High rpm 400 sbc The numbers I posted earlier were from 1970 passenger cars and were the gross figures most of us are more familiar with. . Any suggestion. Before I do What is a Great CI Combo ? I have a friend who spins his BBC to 7200 in a Chevelle and my Boat turns 6500 on a 3/8" rod bolt basicly stock Nothing beats the aural gratification of an 8,000 rpm solid-lifter SBC running at full song. 565 rods, they are at least 40 years old, have been through unknown millions of stress cycles, one rod bolt stretching at high rpm will usually result in engine failure and its Buy STEINBRÜCKE High Performance Red Cap HEI Distributor for Chevy gm SBC 283 305 307 327 350 400 BBC 454 396 427 Small/Big Block 65k coil 7500RPM: Distributors - Amazon. 48 LR clearly favors low to mid range torque. and above 5252 rpm any engine's horsepower number will always be higher than its torque number. Sure there are a lot of LS swaps going on but for gen 1 SBC, 400 still seems the way to go. I do not have a pick-up yet. Bill Perfect Circle Doctor of Motors certification SAE Member (30 years) ASE Master Certified Engine Machinist (+ two otherASE Master Certifications) the ideal rod/main clearance in a 500 HP @ 7,000 RPM SBC might btw I would NEVER reuse the 400 sbc 5. 5-11:1 About the motor:400 chevy, Stock cast crank turned . standard bore. Like lluciano77 said, its a good set up but compression may be a little high. with good rod bolts installed. its in a 77 3/4 ton, th350 trans, mild cam (unsure of the specifics) and not sure of the pistons or rod length, edlebrock performer intake, holley 600 4bbl carb with manual choke, vacuum It's a small block chevy 400 cubes. 55, I would keep what you have and add some 1. 06 inch Height. 0 out of 5 stars 18. It has a 400 flex plate and I just replaced the harmonic balancer with a external balance type. I'm having a SBC 400 built with the following parts. 750 stroke in a 350-type block with 4. At 5252 rpm the horsepower and torque SP383 Deluxe Crate Engine. I have a 400 block and a forged 3. 383 chevy, hot street or race combos youll want a decent baffled 7-8 quart oil pan and a windage screen and a top quality ignition, on any engine you build but obviously the chassis and headers , etc. unless other mods like a different cam and forged pistons and better rods etc. 04 It would drop oil pressure at high rpms and come back to normal under 4000 rpm. I paid less than for a "full" internal balance, but I still can use cheap and available neutral-balanced I have run 4. (low rpm torque) build high cylinder pressure (early intake valve closing point) and What is the safe RPM limit for a Street / Strip stock Chevy 400 Small Block Crank with factory GM 5. 0395 Quench I would think the E 210s are best suited for higher RPM serious racing and the velocity would be down compared to a 185-195 at lower rpms. A 400 has the torque to pull a higher gear. Regardless of port volume all these heads flow about the same cfm until some 0. 033" should be no problem at only 6000 rpm. For a street car with a SBC I think a 406 is hard to beat. 75" stroke isn't a limiting factor until you get up around 7500 or thereabouts, for a 350 it's close The engine pulls hard past 6500 rpm but I'm thinking I should set my rev limit at 6000 due to the rods. Buy A-Premium Engine Aluminum Dual Plane High-Rise Intake Manifold Compatible with Chevy SBC, V8 305 327 350 400, 1957-1986, Buick, Cadillac, Chevrolet, GMC, 1957-1986 SBC Small Block Chevy Aluminum Performer Dual Plane RPM Intake manifold 350 70 SS Camaro, 454 Alum. Save Share I run a 400 with high compression and a cam with a 114o lobe sep. 400 SBCs aren't known as high rpm motors stock, I think it would work with the TPI. I'm running Sportsman ll heads, rpm intake 18cc dished pistons in my 400. and put one light and one medium spring on the mechanical advance. Has anyone compiled a list of the model #'s for SBC Retrofit lifters with the newer high RPM capable versions vs. 1321 posts 400 sbc - stock bottom end ~ 22 cc pistons ~. High Rise, RPM, 350. It also costs more to convert from external to internal. Compare SB 383 Chevy Rotating Assem. About the motor:400 chevy, Stock cast crank turned . (Road racing). 72:1) and the small intake ports. I want to add what I know about ultra high RPM all out race engines such as a purpose built sbc to rev to 8,000- 11,000 RPMs. It is a street/strip car and year round driver anywhere from 15*F-90*f depending on the time of year and when the roads are dry enough, I like to take it out and drive it like it is meant to be. always accurately measure the crank main journals, and remember the crank and block bearing sizes on a 400 sbc and 350 smc are different as are the early 283-327 sbc. It is a 400 sbc, SHP block,solid roller cam and lifters,no restrictors. SBC 400 Bored to 408 Probe Forged Pistons 10. Just looking for a nice street engine that won't see high rpms so I'm ok with the stock length rods and I'd like the CR to be between 10. volume & pressure? Or high volume & std. Save Share The Shark Tooth pump is quite a bit more expensive than the standard small block pump but for a high-tech, high rpm small block it might be a great addition. ProPower engines Guru Posts: 8789 Joined: Sun Jan 21, 2007 6:16 pm Always wanted a 400 under the hood and I've come across one and just want some feedback on the potential compression ratios with the parts. com FREE DELIVERY possible on eligible purchases High Performance: 75,000 high voltage coil spark through 9,000 RPM, upgrade for racing 400 Most 400's came with a 2 barrel carb,but there was a lot of 4 barrels too. Send Private Topic [inpost_gallery post_id=2305 group=”1″] The Test Heads. 030 I see 3 basic choices when choosing what kind of engine to build. the motor is a . Jump to Latest The bigger bore is what you want, stroke is optional depending upon your desired RPM range (where in the power band you want that power). I Re: Bearing clearances for high rpm sbc? Post by Racerrick » Tue Oct 24, 2017 12:27 pm RCJ wrote: ↑ Tue Oct 24, 2017 10:25 am . Jump to Latest Rebuilt Holley 850 double pumper. Using 1 7/8 headers and no mid range dead zone WOW Dart 400 SBC. At lower RPM, it Some stroked crankshafts "may" exhibit some flex at high RPM is the main pin to rod pin overlap is significantly reduced - or nonexistent. The deal is a rebuilt . Worked for I currently have a 355 SBC in my Impala with another Lunati hydraulic roller, this one 219/227 @ . Piston speed w/a 3. Save Share Reply Quote Like. Since you used stock rod bolts, that will be your I am just curious what is a safe max RPM range for a stock class "SBC" Stock crank (442 casting), ARP rod hardware. Besides, think what your family and friends will say when you roll up with Miss Biker Chick. If the block hasn't been bored, the going price around here is $150-175 for common castings and 509's bring more. 5:1 Total timing was 35 Degrees. 350 crank + 400 block + main bearing spacers = high revs safely. It will then rise back to 40-50 when I let off of the throttle. 60 valves that flow 300 at . Here in Canada it was a $500 engine claim rule. Two versions available, designed for power and easy installation. Most likely closer to 2500. selected must match the . 020 or more down the hole vortec heads - modified for lift up to . Save Share At high rpm, the alt is putting the highest load on the belt so any slack in the belt is built up between the crank and the alt on the waterpump side and it will climb out of the pulley where it makes the shortest bend. I'm shooting for ~600 HP/torque NA plus another 100 shot of go juice. my tow rig is a 72 gmc,with a 350 400 SBC short block with SCAT 4340 I beam rods, Probe dished pistons w/ Total Seal 1/16th inch rings. A 10/20 509 is supposed to be the best of all. ) Hi guys,so I have a freshly rebuilt by my mechanic buddy 817 sbc 400 block bored . But, if your after something that can stand longer durrations of extreme load, perhaps a little more rpm, then the big block will have a better The Performer RPM Small Block aluminum cylinder heads are designed for Small Block Chevy 265, 283, 302, 305, 307 327, 350 and 400ci engines up to 2003. Profile Page. Muscleparts. 5 10bolt 4. A. 165 Bore) 3. i've tried adjusting the carb and timing to a few different settings and it's still there. com FREE DELIVERY possible on On the other hand, the Chevy 400 small block provides increased power and torque, making it well-suited for high-performance or high-load applications. Plus I a limited to the changes I I hope to get started on my non-Chevelle project in a couple of months, and would like to hear from you gents who have a strong high performance street driver engine built around a SBC 400 block, or have experience with them. I want to build a low rpm high torque 350 for a Chevy 4x4. . 425hp @ 5200 rpm and 470 lb ft torque @ 4200 rpm on the dyno. But the 400's being high RPM motors? Maybe a fully modded one. 7 I beam rods, speed pro hypereutectic pistons, balanced rotating assembly, Performer RPM 64cc heads and regular Performer RPM intake Lunati Voodoo p/n 10120704 dur @. 6 60 ft. 050" is 233/241 and lift is . then u can decide on a camshaft. Running in Aftermarket blocks, heads, rotators and valve train components can RPM just as high as you can $pend. 600 lift. 001 X Journal diameter. 3:1 compression with . wmv - YouTube Crower's high performance camshafts, crankshafts, connecting rods, roller lifters, rocker arms, valve train components and large variety of aftermarket engine parts for international and domestic automobiles, diesels, boats, tractors, motorcycles, and trucks. in a 53 Studebaker with a ZFsix speed transimission and in 6th gear it had almost the same vibration . I sold it and the owner put it on a Dyno at a Automotive Tech. It has a nice flat torque curve that stays above 400 ft. 30 in a 68 Firebird. The reasoning behind this, hi 68chevelle cuin heads rpm cam ?? To all seems true enough 400 dyno with small cam / small inlet manifold / small head flow and csa . 10/1. Engine Tech - Building a 10,000 RPM SBC - Oklooking for advice :shock: I'm thinking about building a high rpm sbc and not sure what cubic inch will live longer. are used, simply because swapping from a 78cc to about a 61cc -64cc vortec head will more than The quest to build a 400 horsepower small block Chevy is a classic ambition for many hot rodders and car enthusiasts. the more traditional and cheaper low rpm models #s? I've started, anyway: Crane: Regular- 11529 High RPM- 11532 Morel: Regular- 5372 High RPM- 4602 Lunati: Regular- 72330 High RPM- 72430 (I believe rebranded Morel I've been enjoying the information on this site for quite some time and have decided to present my ideas for my 400 SBC build up for the board's review and comments. com FREE DELIVERY possible on eligible purchases. Will rise quickly to 65-70 upon acceleration,then drop to ~20psi. 0003 Boost your classic SBC's performance with Holley's new Hi-Ram EFI intakes. 050. The 10:1 compression I think I will try a fluid damper before an engine swap. 04 I am just curious what is a safe max RPM range for a stock class "SBC" Stock crank (442 casting), ARP rod hardware. both the compression ratio and the RPM's are getting a little high for my build . The old small journal forged rods have been seeing those rpms since those motors came out. I did run the # off the back of the engine and it is a 350. -86 Z28, -73 sbc 4bolt, -385cid 3. 10 gears, moser full lightweight spool,33 spline moser axles, C-Clip elim,moser rear girdle, SSM 400 sbc freeze plugs. Some daily diving and weekend mudding. 565 rods, they are at least 40 years old, have been through unknown millions of stress cycles, and are well known to be a rather weak design, that was originally designed for a lower to mid rpm torque engine, one rod bolt stretching at high rpm will usually result in engine failure and its comon for only the intake, Buy Voltstorm Complete HEI Distributor - High Performance 7500RPM 65K Coil for Chevy GM SBC 283 305 307 327 350 400 BBC 454 396 427 Racing Power Small/Big Blocks Red Cap: Automotive - Amazon. i. esp. Not a high RPM screamer by any means but it should be fun as the torque is available anywhere in the curve. 0002,-. If you are worried about rpm at 80 mph on the highway, change the gear. Improve high RPM range; Large This N/A 10,000-Plus-RPM Small-Block Ford Makes 3 Horsepower/Cube. Aluminum High Rise Intake Manifold Single Plane by The highest rpm 400 I have is in the 56 Corvette. The car (69z, 4 speed, 4. Maximum power for low to midrange rpm, high rpm suffers. You won't be over 5,000 rpm anyway. Cam, and how much rpm can a 400 handle. 26" tall tires, and having a 130 mph trap speed will produce a high RPM at the end. My experience with balance problems is that they get worse with RPM, higher the RPM, worse buzzing. 75 crank, Crower 6" maxilite rods and Brodix heads with 2. solid ft had a 106lsa to help keep dynamic compression up since it was about 10:1 static compression ratio I've got a '71 vintage 350 Chevy in my deuce sedan and I've got a vibration that starts about 1800 rpm. Bigger cubes will make more pony's but might expire sooner. My car is a 65 Beaumont, 3100 lb car and goes like stink. 1971 started the decline of compression, the retarding of cam timing and the end of the high horsepower era. 【Compatibility】:This aluminum intake manifold compatible with 1957-95 Small Block Chevy SBC 350 400 【Specifications】:Providing power over a wide RPM range, Basic Operating RPM Range: 3,500-8,000;Height: 5. 73 open. Stock 400 sbc motor. Once I hit the 3000 RPM mark the motor pulled nicely. A HotRod Pro Posts: 250 Bearing clearances for higher RPM in a SBC? Discussion in 'The Hokey Ass Message Board' started by Hot Rod To Hell, Apr 25, 2011. 400's can make awesome power under 5000 rpms, if building a high rpm engine the holes can be filled and splayed caps installed to strengthen the block. 350 vs 400 SBC. 700" rods with a 600 gram forged piston? Wouldn't a block live longer at 7000 rpm, making 400 HP, than it would at 6000 rpm, amking 600 HP? Randy. 99 More Info. +. 10 R&P. Oil pressure at idle 40-50 psi. Save Share For a daily driver / weekend warrior which doesn't need to be under long durations of heavy load or high rpm, loose the extra weight and go with the 400 small block since the specs are nearly the same. We could've winged the AFR 195 CNC-headed beast to eight grand but we'd already so i have a 400 sbc, and am looking to put some older style 350 heads on it. ON this 350 I was running a 6qt Milodon Vega oil pan which didn't have a lot of room for a typical windage tray. Some bigger heads are in my upgrade plans. 400 inches of valve lift have taken place (see Fig 1). That really woke up my old 400. Jump to Latest Below that higher rpm, it is also difficult for a carburetor (or carburetors) to get a proper signal across the venturis to meter fuel properly. Fire the beast A stock sbc can and will take high rpm if they are complemented with good parts such as arp rod bolts and good valvesprings as those are usually the deciding factors in keeping a motor together. As for 400s not being as popular, i have not seen that. I want to spin this motor to 6500 RPM without ever having to worry about it. 800-inch stroke with 4. 02/1. 195 afr heads flow to approx. Email Report CNC BLOCKS N/E Senior Member Posts: 989 Loc: NORTH EAST Reg: 12-12-03. 07-03-06 08:21 PM - Post# 963242 Hi Guys, I had an SBC back when I was in high school. 40 over, splayed 4 bolt mains added (was a 2 bolt), decked for cleanup only. 06 inch Height: Intake Manifolds - Amazon. Hot Also a 400 main being larger than a 350 I would lean towards . I have a rebuilt 400 sbc with a rebuilt 2004r that has a very noticeable vibration from 1200 to 1700 rpm. 565 factory rods that looked anorexic to a factory 5. 6 valves, guide plates/screw-in studs, flat tappet hyd cam (if I remember correctly) about . Yes, I know I have a mismatch with the heads/cam/intake. We usually spun it to 6800 RPM. It's my belief that increasing the RPM range will aggravate the engine's faults and waste some of the What is the safe RPM limit for a Street / Strip stock Chevy 400 Small Block Crank with factory GM 5. View (43) $164. Compression was 9. com FREE DELIVERY possible on Need less to say on 383 ,,395,,400 410 sbc . I think the problem for the high-rpm break up was that lack of fresh grease under the coil. The intent here is to run four pairs of the Dart Platinum Pro 1 heads having intake port volumes of 180, 200, 215, and 230 cc. But if you want to go above 5500 there are several better engines out then a sbc to run above 5500 rpm and still make similar power in a more controlled manner. Crower leads the market with 55 years experience manufacturing high quality custom products at an affordable price. Do you guys idle higher than 1200 ( witch i thought was high) but im not sure if im restricting my power or am i around where i should, when i road tested it today ran good but didnt seem to feel like all the power was there How to get over 500 lb-ft of torque from an HT383 Chevy small-block 383 stroker engine. It's hard to tell at WOT, but at part throttle, it gets to almost 15:1 above 4500rpm. If you are not going to be turning any high RPM you should not have any problem with the stock crank and rods, just add some good rod bolts and get some pistons to give you the compression ratio you want. That 400 was a great engine. I have also received PMs We did the exact same thing in the late 90's. 002"/0. 526 comp roller tip rockers poly locks, and magnum chrome moly Post: new build high rpm chevy small block (Topic#287671) jacksonbuiltracing Forum Newbie Posts: 53 Reg: 09-29-12. For 1 you can forget about driving this car on the street in any civil manner. ,4 valve relief KB dished pistons,Profiler AllAmerican 195 runner heads with a Speed demon 650 on an RPM intake. e. 550", gasket matched, smoothed combustion chamber ~ 9. I recently built a 400 small block with "D" shaped dish pistons, 906 Lean at High RPM. Depending on what you want to do that can be a good thing. It’s also present in P or N, so my focus has been the flexplate. 5:1 or higher range and match the cam duration and lift to maximize It's got a New Process 435 four speed, coupled to a t-case (high 0. 5:1 compression. I thought I would post the dyno numbers to show what motor I produced with some of the help and insight I received from people on this website. its in a 77 3/4 ton, th350 trans, mild cam (unsure of the specifics) and not sure of the pistons or rod length, edlebrock performer intake, holley 600 4bbl carb with manual choke, vacuum SBC 400 stock bore/stroke - world motown block 5. 69 SS396 Cortez Silver(SOLD) 69 Pro Tour - LS3/T56 (SOLD) If you don’t push the limits how are you going to find the weak spots? USMC- Retired My car: 1970 Chevelle Factory 12 bolt /4-Speed Malibu -Dual stage wet nitrous with heater & purge - Holley Strip Dominator, Speed Demon 750 CFM - (All MSD distributor, blaster 3 coil, 6AL, & 3 stage retard) - 4 wheel disk brakes - Aeromotive Fuel system – Boss 338 18’s - There are two local to my area racers that are running high 10's on a good day and usually 11 teens with sportsman II heads (ported) on a 355ci SBC engine, that runs 10:1 compression, an RPM intake, a 700DP carb, and a Flat tappet Solid lifter cam! Buy Voltstorm Complete HEI Distributor - High Performance 7500RPM 65K Coil for Chevy GM SBC 283 305 307 327 350 400 BBC 454 396 427 Racing Power Small/Big Blocks Red Cap: Automotive - Amazon. 7 rod in my opinion or it was just because it was that much 16 isnt high, a good running small block like timming, at least 20 initial, DEPENDS ON BUILD OF SMALL BLOCK TOO your timming her by ear, hows she like 16? any pinging? how she start? heavy springs = high rpm). Hi, I also have a vibration from around 1600rpm and up. The 400 stock crank and pink rods are I have a sbc 360 hp and a carter performer 625 carb ,im idling around 1200 rpm right now at 14 timing. 08 gears. 871:1 high range) and 4. Kinda thinking about a 302 but open to suggestions. I did read that a de-stroked 400 with 6” rods would work a great deal less at high rpm and give me good longevity, with less stress and wear. Recently tuned with new cap, rotor, 8. You might have inadvertently gotten a small block 400. 08 or 3. It needs to run on 87 octane too. What name brands are best for cranks,rods Buy A-Premium Engine Aluminum Single Plane High Rise Aluminum Intake Manifold Compatible with SBC Chevy 350 Engine, 3000-7500+ RPM - Small Block Vortec - 6. However, it managed to increase its displacement by modifying the internal dimensions. 5:1 comp, Eagle 5. stock pistons, 5. B. 0025", but the identical parts in a 1500 HP blown 8500 btw I would NEVER reuse the 400 sbc 5. 004" piston to wall clearance, 3. Unless being built for high rpm usage it is not anything to worry about. The engine was professionally rebuilt and supposedly all of the rotating assembly was assembled with matched (by weight and dimension) but not dynamically balanced. However, this particular project is outside of what normally comes out of the DESTROKED 400 SBC: GM 400 Block, bored . Getting sufficient fuel pressure with my electric pump. Since you said racing is not a high concern, I would go for a nice sedate 434 cid. 5800--6100 requires single plain for higher rpm peak vic jnr etc HI AFR 220 on 400 cuin peak hp about 6400 -6500 Afr 227 on a 400 cuin peak about 6800rpm 260+SR DESTROKED 400 SBC: GM 400 Block, bored . You might make a little more top end with a Victor, but less torque. 5" stroke reaches max long term dependable piston speeds at about 400 rpm lower than Buy A-Team Performance - HEI Distributor 65K Coil 7500 RPM - Compatible with Chevrolet GM GMC SBC BBC 262 265 267 283 302 305 307 327 350 383 400 SBC & 396 427 454 - Super Red Cap: Distributors - Amazon. the more traditional and cheaper low rpm models #s? I've started, anyway: Crane: Regular- 11529 High RPM- 11532 Morel: Regular- 5372 High RPM- 4602 Lunati: Regular- 72330 High RPM- 72430 (I believe rebranded Morel 4602s) Howards: Post: Update on misfiring on higher RPM's (Topic#135251) Chevyboy62 Super Senior Member Posts: 3514 Age: 45 Loc: Charles Darwin Middle Sch Reg: 02-10-02. 600? were the test engines valve train tops so i have a 400 sbc, and am looking to put some older style 350 heads on it. When I took my 400 block in to the machine shop and asked about splayed caps I was told by them they would put the splayed caps in if I really wanted them to but they were very clear that they had seen guys fill blocks almost solid for drag cars and do just about anything in their power and had never seen a 2 bolt 400 block take more than about 600 HP with high RPM. ProPower engines Guru Posts: 8789 Joined: Sun Jan 21, 2007 6:16 pm I'm sure it depends on the specifics, but I think in general, the higher powered lower rpm block will live longer. 050 still makes plenty of low torque right off idle. The small block Chevrolet engine, known We assemble with precision to maintain balance and durability at high RPMs. The 6” rods were a must with higher compression because the pistons would be NewbVetteGuy wrote:Has anyone compiled a list of the model #'s for SBC Retrofit lifters with the newer high RPM capable versions vs. 565 rods. 7 rockers. 10 deck clearance with flat top pistons crane soild lift cam 561 lift set @ 28 & 30 ex a couple KEY factors in getting any smaller displacement SBC engine to perform well, is your going to have to get the static compression ratio up in the 10. 020, 10. User Info. I had another SBC 425hp. The 6” rods were a must with higher compression because the pistons would be Better mufflers-yes. Performer heads are designed with compact combustion chambers and high-flow ports to increase throttle response and overall performance throughout the RPM power band. I have one "pure stock" engine that has over 1000 racing miles on it with a normal high rpm of around 6800. Compatible with 1957-95 Small Block Chevy SBC 350 400 I also once had my one and only stroker build and was a 377 cubic inch aka 383 but it had a standard bore as the block was new and the rotating assembly was a used 400 small block crankshaft that was grounded under and the rods were the poorly made 5. You can make it into a stump puller, drive all day or head to the track if you want. A 400 SBC block produced with 2 bolt main caps is a stronger block than the 4 bolt main version even though the main cap clamping force is greater with 4 bolts. 48 LR, low compression (calculated 8. If you plan to use a tunnel ram on a street motor, use a loose torque converter to get the motor rpm's up past what a stock converter would That wasn't a typo. Small Block, 708 HP plus nitrous. We plan on testing different distributers, locked and with a timing curve. Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar. 700" rods with a 600 gram forged piston? Are there any special things that So really to build a high-rev small block, need a good flowing set of heads (I was running ported Dart II heads), a solid camshaft can't be beat for high-rpm durability, single plane manifold and matched carb (of course We used a AFR 195 head with modifications and a performer RPM air gap intake with a 1 inch open spacer. I have a 400 SBC running at about 500 HP, In short, even if 400 SBC with forged flattop pistons (probably around 10. 7" rods FWIW, 390 RWHP is good for mid-high 11's @115 MPH with a 3800 lb. 11:1 compression and sees 6,500 rpms. I currently have a 69' Corvette coupe with a ZZ3 small block, M-20 Muncie and 3. You could probably substitue less expensive pistons and rods for this power level Buy A-Team Performance - HEI Distributor 65K Coil 7500 RPM - Compatible with Chevrolet GM GMC SBC BBC 262 265 267 283 302 305 307 327 350 383 400 SBC & 396 427 454 - Super Red Cap: Distributors - Amazon. 70 axle. It has a Scat crank, compcam xe274 cam,9 to 1 comp. com FREE DELIVERY possible on The quest to build a 400 horsepower small block Chevy is a classic ambition for many hot rodders and car enthusiasts. us. 005. Soft on low rpm maximum power in the mid range and the higher rpms. I used a Sig Erson RV camshaft in the 400 SBC that I built for my pick up. Even at 0. I have a wideband in one bank of the exhaust. I had a 3. School and found it had low fire at that RPM. Top. They bring top dollar here $250-300. The intake runners are optimized for high RPM operation, allowing in many cases using vortec heads on a 400 plus displacement sbc short block is basically a bad idea if your goal is impressive hp levels, rather than low and mid rpm torque. Built it 22yrs ago, . 65 or 1. com FREE DELIVERY possible on eligible purchases 3000-7500+ RPM - Small Block Vortec - 6. And it worked. For those RPM's I would stay away from a factory 400 '69 Malibu with an '84 454 (461), Isky 270 cam, GM HEI, Edelbrock 650 cfm AVS, high-rise intake, headers, 3" exhaust, TH 400 with 2000 stall, 2. With this combination my cruise RPM will be between 2400 and 2600 depending on tire choice. Yow! So much to do, so little time Top. Most of what I've read elsewhere indicates that a stud girdle is not a good option and splayed caps are necessary once the 400+ HP mark is breached. light flat tops, 64 cc 041x heads 055 intake and stock if your serious about building a high rpm screaming sbc I can,t think of anything Ive built or seen built that sounds better or pulls harder than a PROPERLY BUILT 377 , thats a 400 block with a 350 crank, it will spin at Wouldn't a block live longer at 7000 rpm, making 400 HP, than it would at 6000 rpm, amking 600 HP? Randy. I built it out of a 400 block, and a 350 crank, with bearing spacers (before you could get thick bearings for said purpose), that came out to about 377 inches. I am getting popping/misfiring above 5000rpm and high load. 5mm MSD wires, and Bosch spark plugs gapped at 0. 400 SBC Daily Driver Buildup. Make sure to back off the idle after setting the timing. 43:1 rear axle gear ratio with a posi-trac and the I've finally got the results for the 400 SBC that I have been asking all kinds of questions about lately, from differences in valvespring pressure, to crankshaft and block reliability, manifold porting etc. I don't agree with all this casting numbers hoopla,but a lot of people do. 526 comp roller tip rockers poly locks, and magnum chrome moly You might have inadvertently gotten a small block 400. The crank would break after 400-500 miles and if the rods weren't polished they might break sometime before that. 030 over, flat tops, 1966 double hump heads that have been gently massaged, stainless 2. is my carb taking a crap on me??? Buy Aluminum High Rise Small Block Chevy SBC Vortec Hurrican Single Plane Intake Manifold 350, DM-3318: Intake Manifolds - Amazon. 7 Rods Balanced Rotating Assembly Decked . Another thing to look at is the groove itself. #5 and #7 plug wires reversed? #4 and #6 It's got a New Process 435 four speed, coupled to a t-case (high 0. Send Private Topic View Profile. If you’re planning a basic junkyard 350 small block build under 400 horsepower the two bolt main block is up to the task. The vacuum advance unit also has an effect. 040 400, it comes with a new edelbrock carb, new victor jr intake, Kb hyperutectic pistons, 882 heads with comp springs, 292 cam, new pro billet distributor, alum weiand water pump, new hi torque starter, K&n air cleaner etc. Larger Dave . Should i be looking at std. 75" cast Scat crank, at . 400 SBC with a cast bottom end in an IMCA modified. 2 offers from $14889 $ 148 89. Aiming for a ton of torque that comes in early in rpm range, no strip time anticipated. 5 roller rockers. You may get away with 6000 for a few seconds before you shift. 030 over 350 . 29 400 SBC timing question. If I wanted to build a small block chevy that could spin up to 9000 rpm and survive, what should I base the engine off from. The Shark Tooth pump is quite a bit more expensive than the standard small block pump but for a high-tech, high rpm small block it might be a great addition. The use of main studs (even with a full 1 turn past zero lash i have easily turned 5k rpms + with any sbc/bbc with stock hyd lifters with a mild perf cam so check you'r valve adj. Any thoughts on The 400ci SBC engine with a 1. /lbs. from "a TPI and a 400 SBC are mismatches, the tpi is made for low end torque and the 400 sbc is made to make lots of power at high RPM's" Now, I know the TPI is done by 5000 rpms. Skip to main content. , One Piece, Flat Top i have a . But, to build a proper stroker that can spin fast enough to make the power of a high reving small block will probably cost just as much. 0045". It has ported fuelie heads, high rise gm intake and open headers. Some of the HEI vacuum units have too much. What should I do for pistons. , the ideal rod/main clearance in a 500 HP @ 7,000 RPM SBC might be 0. 0025 on both rods and mains on something that wasnt stock Tony GOATROPER02 The 400ci SBC engine with a 1. Especially when you consider a stock Chevy 350 hp rating from the factory has been as high as 330 horsepower. 75"x4. 4. GM I see 3 basic choices when choosing what kind of engine to build. Building a High RPM 400ci SBC to Replace Broken "Compression Obsession" - Engine Power S10, E6&7 We are the Official Marketplace for the Engine Industry. 030 over), edelbrock performer intake, mild cam and a q-jet 750 cfm carb right now. 005-inch bores to generate exceptional low-end High RPM SBC ? I want to build a SBC that will turn some R's . The load capacity of the "hydrodynamic wedge' that supports the crank and rods drops rapidly as the clearance increases, so it's important to not run much more than enough to ensure distortion doesn't cause parts to 'ground out'. The small block Chevrolet engine, known We assemble with precision to maintain balance and destroking a sbc 400. paulie. 5:1 or higher range and match the cam duration and lift to maximize the port air flow rates in the upper rpm range, and that will generally require selecting a solid lifter cam, use of tuned If you don’t push the limits how are you going to find the weak spots? USMC- Retired My car: 1970 Chevelle Factory 12 bolt /4-Speed Malibu -Dual stage wet nitrous with heater & purge - Holley Strip Dominator, Speed Demon 750 CFM - (All MSD distributor, blaster 3 coil, 6AL, & 3 stage retard) - 4 wheel disk brakes - Aeromotive Fuel system – Boss 338 18’s - if it was me ide put a 400 small block in it. Jump to Latest The itty bity DZ 302 was capable of flowing every bit as much as a big block because of high rpms. a 350 with its 3. 034" quench; with a 7500 rpm limit it would just polish the carbon see-through on the piston top where it met the quench areas of the head. THANK YOU. The engineers at Holley designed these intakes to support small-block Chevy engines with displacements from 265 to 400 cubic-inches. 039 gasket HEI - MSD street fire and with those two iskys . i understand there needs to be steam holes drilled, and the engines are balanced differently. heads are where all your power and torque is. Whereas a typical stroker uses a 400-Chevy-type crank with 3. 600 lift 314 intake duration 314 exhaust duration 252 on both at 050) 1. I would suggest 1/4-1/2 turn past zero lash for a hyd perf cam,some people use 1/8 turn past zero lash but that will often give you some lifter noise at startup. It is definitely rpm related (not vehicle speed). Stock 400 rods are the weak point in 400's. As far as I'm concerned its a mild set up. 390 in; Satin aluminum finish; This intake manifold is made with natural satin finish lightweight aluminum of superb quality, which has high 1972 Nova 400 SBC, M-20 2001 Camaro SLP SS 6. But for prolonged periods of more then 20 minutes 4500 is as high as I would push a sbc. Crower's high performance camshafts, crankshafts, connecting rods, roller lifters, rocker arms, valve train components and large variety of aftermarket engine parts for international and domestic automobiles, diesels, boats, tractors, motorcycles, and trucks. time I hope my BBC RPM Crower's high performance camshafts, crankshafts, connecting rods, roller lifters, rocker arms, valve train components and large variety of aftermarket engine parts for international and domestic automobiles, diesels, boats, tractors, a couple KEY factors in getting any smaller displacement SBC engine to perform well, is your going to have to get the static compression ratio up in the 10. What solved the issue for me was running 1 quart less oil which moved the oil level away from the crank and putting a stock pickup on the oil pump. I've considered everything from a 283 build to a LT1. That pulled hard all the way to 7000rpm, thanks to some seriously hogged out heads that a retired racer neighbor hooked me up with. pressure? Or high volume & high pressure? My oil pan is 7'3/4 deep. These are externally balanced engines, with balance weights on both the harmonic balancer and on the flexplate. 050 lift. I say around 5000rpm even though your peak horsepower rpm will be higher. 4 Compression 5. 510 lift and about 235 duration at . they make alot of torque. 505/. My 400 is internal balanced at the flywheel end, and external balanced at the damper end. It would come apart for freshening every 10-12 races or so. If it was stuck open at high RPM is should show more pressure but at idle it would be low of course. The engine measures around 28″ x 26″ x 27″. The link below was posted by one of Building a High-Rev SBC Motor, Just build a 377 de-stroker. Carb is a AED 750 CFM. When it comes to cranking serious torque from the classic Small-Block, it’s hard to beat the 383 stroker combination, which uses a long, 3. Cubic inches is like Indiana Jones with a btw I would NEVER reuse the 400 sbc 5. 030" forged pistons, . i've got a sb 400 chevy ( . We revved this thing almost to 8,000 rpm with hydraulic lifters in the block. Crankshaft Stroke: This directly contributes to the engine’s displacement and torque curve, influencing i have a . What name brands are best for cranks,rods Hello fellas I'm having a problem with my "el cheapo" SBC with it involuntary rev limiter It misfire and pop at exaust at 6500 rpm and abovethese are the details that might explain the problem, I'd like somebody can point if yes or not : The dizzy is an Accel single point converted by a mallory E-spark point eliminator kit grounded to the intake. rookie Guru I have always been a fan of high revving small blocks, if I had the funds I would do an 81 Cutlass Cruiser Wagon; 406 SBC, 12:1 comp, Hbeam rods,forged crank, Comp Solid roller 4/7 swap 673/672 lift, Victor Jr, AFR 220 heads, Comp roller rockers, custom built 945 hp carb,Trans Specialties Th350 Ultra bell and transbrake with ATI 8" 4000 stall, 8. Maximum rpm will be 7500-7800. The dizzy is a MSD Streetfire hei,It has headers a th350 tranny with shiftkit,2500 stall and posi rear The 400's even with a cam over 220 degrees duration at . Lunati says my cam's powerband goes to 6200 rpm. However, it suffers from lower fuel economy, higher repair costs, and potentially lesser longevity compared to The 72 Impala 400 had 170 hp @3400 rpm and 325 ft lbs of torque @2000 rpm with 8. Ive got a 350 4 bolt main block bored 60 over, stock heads and crank. 10 deck clearance with flat top pistons crane soild lift cam 561 lift set @ 28 & 30 ex I can surely use this as a basis for another 400 SBC project I have in the works, perhaps upgrading to a solid roller cam, a victor jr intake, and a bigger cam with a higher stall to get to the 500HP mark. same with compressionbut one must compromise with compresssioni would highly recommend balancing the motor,figuring out gear ratio,weight of the vehicle and cruise rpms. Sure, you could run a bigger cam in that 400, but with those gears, 3. 56 rears) will not be driven that often, I just want to try it just to show it can be done. That wasn't a typo. After that I got into sprint cars and engines got much more expensive. I plan on running pump gas on the street and race fuel at the track. The dizzy is a MSD Streetfire hei,It has headers a th350 tranny with shiftkit,2500 stall and posi rear 400 SBC with forged flattop pistons (probably around 10. 565 rods, they are at least 40 years old, have been through unknown millions of stress cycles, and are well known to be a rather weak design, that was originally designed for a lower to mid rpm torque engine, intended mostly for pick-up trucks and luxury cars with automatic transmissions. My camshaft recommendation was based on the 1. But I never had this high of compression. Joined: Aug 19, 2003 Posts : 3,036. After all, Ben Strader is the High Priest of High RPM. 039 head gaskets Flow Tec 200cc heads Holly strip dominator intake with 2” riser Holly HP750cfm double pumper carb hi guys, i'm driving myself crazy trying to figure out why i'm getting a "popping" sound out of the carburetor at high rpm's. Compromised power across an intake manifolds rpm design avg on low rpm semi strong on mid and avg power on top end. C. 5:1 comp) 200 psi cranking compression Thats why I went with a stock HEI, as I have run them before up to around 6000 rpm. It's my belief that increasing the RPM range will aggravate the engine's faults and waste some of the engine's potential. If your measurements are correct . Hi guys,so I have a freshly rebuilt by my mechanic buddy 817 sbc 400 block bored . I was thinking about SRP flat tops and a comp cam solid roller around 250/260 @ He's good with the stock 400 SBC short block and the Edelbrock Performer RPM cylinder heads. 030 over 350 in 79 camaro having miss fire or skip above 4500rpm. New motor, 383 stroker,victor junior heads, Milodon SBC stroker pan, pick-up, and hi-press/hi-volume pump. race weight A-Body if you can get a1. It must be an internal pump and not a titan,for cost and configuration issues. Your compression is on the high side but aluminum heads will support that compression ratio. 48 stroke Flat top pistons with valve relief Comp cam hydraulic 12-470-8 (. That RPM Air Gap and that one inch spacer will just work fine on that 400, especially with those 3. if I'm more than The higher the RPM the more advance you need ,at 9000 rpm on my small block I run 44 degrees total! If not my spark would be after top dead center because the piston speed at high rpm is faster then the spark at the plug and the initial burn; The combustion also needs time to expand in the cylinder to push the piston down if you don't advance enough the piston 400 small block 40 over (4. High Performance: 75,000 high voltage coil spark through 9,000 RPM, upgrade for racing Engine Tech - Building a 10,000 RPM SBC - Oklooking for advice :shock: I'm thinking about building a high rpm sbc and not sure what cubic inch will live longer. If you've got some low rear gears you'll quickly climb in to the meat of the power band with a lower stall converter. It is going lean at higher RPM. Connecting engine builders & buyers from around the world. It appears to drop at higher RPM after reaching a good pressure on the way up. 0L M6 425WHP 98 Jeep Cherokee 4x4 Daily beater. I have a 400 SBC running at about 500 HP, In short, even if Internal balance can be easier on the bearings and crankshaft, particularly at higher RPM. We could've winged the AFR 195 CNC-headed beast to eight grand but we'd already The SBC 400 has the same dimensions as previous and succeeding small block engines. 8500 rpm answers my question. 400 sbc advantages and disadvantages.
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