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Overheating is a wives tale. CNC-Motorsports Chevy 400 short blocks have quickly raised the bar to a new level in offering high quality performance short blocks at an affordable price. Its going to be a street car and raced at the strip about once a month. I had a good luck using SRS Probe pistons for my 350/383 builds with 5.7, 6.0" rods). Another good reason to build a large displacement small block that builds torque rather than horsepower is the evil stuff that can and does occur at high RPM. :yes::yes::yes: Comp Cams Xtreme 268 cam and whatever lifters. VERY easy to obtain, cheaper, less rpm. Quite a few years ago, my son and I built a 400 for a '79 K10 he had at the time. I … Definatly spend the money on getting it checked out before going nuts. A cam around 270 duration 550 lift. If playback doesn't begin shortly, try restarting your device. it will be backed by th350 w/ 2800-3200 stall and a posi 3.73 rear. Don't forget to drill the steam holes in the heads. Organized people are just too lazy to look for their stuff... http://www.chevelles.com/forums/showthread.php?t=386745, http://s145.photobucket.com/albums/r215/jrn182/Rick/Chevelle In Burlington/?start=all, VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. It takes alot of drilling to get it in balance. Like anything else, proper prep and machine work is key, especially on a 400. I got them at a local race shop. I've used Kieth Black hyperuectic pistons and never had any problems. I took it apart and inspected and all looked real good as if the engine had very few miles. Good luck. Last month I had posted about doing a 305 build for my 65 C10. SBC CHEVY 406 ASSEMBLY SCAT CRANK 6" RODS WISECO FLAT TOP 4.155 PISTONS 400MJ. This means the balancer and flywheel need to go to the machine shop also for balancing. Doesn't really matter too much bout lifters, I think I used Federal Mogul. CNC dart short blocks have become a huge hit among racers and performance enthusiast all over the world. The 1947 - Present Chevrolet & GMC Truck Message Board Network, http://67-72chevytrucks.com/vboard/s...ight=406+BUILD, http://www.ebay.com/itm/SCAT-SBC-CHE...b0c1f0&vxp=mtr. High volume oil pump, new flex plate and harmonic balancer, then get the whole rotating assembly balanced. I have seen plenty of bad blocks that were not 400s. This means the machine shop will not like you when it comes to balancing the flywheel. I have read the book by David Vizard about max perf SBC on a budget. Car ran 11.60s on motor with nitrous cam, never sprayed motor though. I want to put the engine in my Z, but may also put it in something else later. They tend to break somewhere in front of the front-most rod throw. Rockers have started pulling them up. I hear 400's have overheating problems. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! Main studs on a 2 bolt, align hone the mains, plug the steam holes, square … It seems to be a new trend, alot of guys do not drill steam holes anymore. 400 sbc, AFR 210 heads, nitrous cam, 350 trans with 3500 stall, 3.73 gear, 950 HP carb. ^what he said about the heads. These days with pistons designed for 5.7 and 6 inch rods on the 3.75 inch stroke, it's easy to build a 406 (.030 over 400) that makes more power, gets better mileage, and lasts longer than the old 400. These are a little bit more expensive than your standard hypereutectic slugs, but can handle abuse or bad gas. 400sbc 550hp build progress. This will go into my 70 ELCo down the road. Stock 400 cranks do not tolerate RPMs above 6000 or so very well over long periods of time. Alot of guys do not drill steam holes anymore. have to be particular about deck surface, for sure mls head gaskets and quality head bolts, sonic test bores to check for core shift. Re: 400 sbc build. Was going to mention that until I saw burnin oil's post. stay away from 4bolt mains. We have the ability to custom build you just about any combination the way you want it. This will be for near daily use and occasional rice-burner/Ford bashing. 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. A lot of folks remember the 400 as a truck engine, but that's because they were strangled by small heads. Compression seemed pretty high? The 6.0-inch forged-steel rods (also … It was intended as a low performance, high-torque engine primarily used in Chevy's heavier passenger cars and light-duty trucks. If you want to spend big money you can have it internally balanced like the rest of the small block family but it will take heavy metal, ie mallory being added to the crank. With a 150 shot of N2O it ran a mid 11 sec quarter until the pistons finally gave out. Stock 400 cranks do not tolerate RPMs above 6000 or so very well over long periods of time. There is something to be said for an ultra-powerful 400-plus cubic inch small block that spins to 7,000 rpm and makes gobs of horsepower. Anything and everything is open to suggestion. Another book I have found to have some good info is "How To Build Big Inch Chevy Small Blocks". Longer rods than the stock 5.565" are a good idea since pistons are widely available for such combos.". CHEVY 400 ASSEMBLY SCAT CRANK 6" RODS WISECO -12.5cc Dh 4.125 PISTONS 400-MJ. I bought the car with the 400 in it, and I recently came across why its not making a whole lot of power (Its making 210hp,325tq to the wheels.). If I were building an open track car that would live between 6000-8000 RPM, I would seriously consider this. 400 sbc build Discussion in 'High Performance Modifications' started by carhead22000, Feb 11 , 2021. 400sb were always autos. Afr composite intake with Holley 750DP. 400 pistons You can go with 400 pistons that are 0.060" over and purchase custom aftermarket rods that will be basically sbc small journal 2.000", with a center to center of 5.500". I used a CompuCam in the 215 duration range with 10-1 compression, stock 350 heads, intake, exhaust, computer and smog gear (plus a performance chip). Using heads, a camshaft and intake system designed for optimum power in the 3,500 to 7,500 RPM range will not be very easy to drive on the street, but a well thought out 350 CI combination designed to produce power from 2,000 to 6,000 RPM can make 400 … Have seen a lot of guys go wrong thinking they can change flywheel/flexplates at will like other SBC. Be careful on the assembly though. There will be a big difference in compression between the static numbers listed above and the true DCR. JavaScript is disabled. The 400 CID Chevy small block engine was produced from 1970 until 1980 and was the largest displacement engine made in that platform. And, stock rods need upgraded bolts (which have to be "special" 400 bolts", and then reconditioning, and by the time you do all that, you're more than halfway to a good set of aftermarket ones anyway, but you still have nothing but a bunch of stock short ones. Still playin with trucks, even at my age. Get the crank turned and polished, use 5.7" long rods, (stock 350 rods) resized and use ARP bolts. I am pulling the heads now to pin the studs. This SBC 400 only has 60K actual miles, so its all still standard on the bore, rods and mains and has very good oil pressure. What are you looking to use for this 400 build? It's not unreasonable to get 400+ HP from a SBC 400 with high flowing modern heads, intake and carb with the proper cam shaft. 400sbc 550hp build progress - YouTube. Yeah I thought my last stock 400 crank was good to about 6500 RPM too, until one day out of the clear blue (typical cast crank failure mode: no warning, just breaks) it broke off at the front of the first rod throw... motor still ran, drove itself up to the engine hoist.... flushed a whole bunch of $$$$ in balancing, filleting, etc. The book explains in simple language what is required, and what to look for when rebuilding 1st GEN SBC. Interestingly I am fascinated by by Danny Popp/LPE's LS7 388 destroker. If you have a 400 SBC, please list your build-ups. Put some work into them and they will run circles around a 350. I'm looking to build a 400 sbc. The 2-bolt vs 4-bolt Chevy 400 small block debate rages on with no end in sight, so in the meantime Budget Build Garage begins the 400 sbc disassembly. my present engine I had the caps dowel pin to block before line bore. Tap to unmute. Post. I've been building 400 sbc's for a few years. I would let budget and piston selection guide this. It appears that the previous owner took the top end of a 305 tbi, (stock 1991 camaro motor) and slapped it ontop of a 400sb. Sort by See all Rotating Assemblies. Freedom is not caring what others think of you, Your gonna be pushing it unless you go with good heads. Page 4 of 5 ... Because I am flirting with this exact idea. 400 sbc build. x2 on the 400 SBC being external balanced. And with any 400 build, it is advisable to deck the block to help the gasket seal. No steam hole here. This approach has a lot of merits but comes with a slight drawback; all 400 ci small-blocks utilize siamese’s cylinder walls that are known for creating air pockets in the cooling jackets when a … The difference is only .05", 5.65" vs 5.7". 14 results. SBC Custom Kits: 383 Complete Engine Kit • 383 Stroker Kit/Stage 1 • 383 Stroker Kit/Stage 2 • 383 Stroker Kit/Stage 3 • 383 Stroker Kit/Stage 4 • 427 SBC All Aluminum • 434 SBC 650hp SBC Custom Builds: 400 SBC All Aluminum • 400 SBC N2O Street/Race • 400 SBC Dart SHP • 427 SBC Short Block • 434 SBC 650hp on Pump Gas Location: hells training ground (aka Ariz). I was thinking bore to 406 use the sbc350 size crank and 6.0 rods, afr 195cc heads with pistons to make 11.0.1 compression. Shopping. Watch later. Anything mass produced is going to see core shift and thin spots. I'll throw my 2 cent's worth in here as well. I've had a bunch of 400s and loved all of them. or have to worry about the engine everyday. Once balanced these parts will not be able to be replaced without a rebalance of the rotating assembly! Im looking to get 500 HP out of it if possible. Leading many builders to strap a set of 350 heads atop a 400 based short-block. Even an entry level one sounds appealing. Small Block Chevy 400 MAXED on the Dyno - Velocity Stack TestedNick's Garage. 400 sbc build. The small journal will allow for more clearance between the rod and the block/cam. "One other place you might want to consider aftermarket stuff is the crank and rods. After this you can run a standard balancer and flywheel. Shop the Best SBC 400 Street Kits and Forged rotating assembly kits for turbo, nitrous, or street. After my son crashed the K10, we put that engine in an '85 IROC, with a TCI TH350, 3.73 detroit locked 9". I'm a big block guy, but if I were to build a small block it would be a 400. any recommendation on which lifters to buy? 2bolt steel caps and arp studs. I currently have the block a stock crank .030 over forged flat top speed pro pistons and a comp XE274H cam. I love 400sb Also. Good cyl head, cam around 240ish at .050 +- should get you there or real close. Should make about 500HP on pump gas right? Hay everybody, I have a 400 block that I was looking to build up. I wouldn't sell them that short though. We started out with a stock rebuilt short block, bolted on a set of Vortec heads, and slid in a Comp XE4262 cam, performer intake and 750 Holley. Did you buy it off Craigslist from a guy in Clovis? 1991 Camaro RS w/T-56, 406,AFR195s,XE284,RPM airgap,10.8:1,770 street avenger,1 5/8 shorties,3" hooker aerochamber, weight jacks, Koni yellows, Eibach racing springs(850/175), Sphon panhard bar. You have to conduct some paper experiments with the heads, pistons and camshaft as these are closely tied together. 1971 chevelle SS conv. If you're using a stock block, make sure it has the additional coolant hole in the middle of each deck. then google silvolite compression calculator and figure out the DCR to ensure that it will run on pump gas. If you had a good shape stock sbc 400 how would you build it? Been there! The 400 small-block is rapidly becoming a scarce commodity on the Bow Tie performance scene. It seems to be a new trend. They tend to break somewhere in front of the front-most rod throw. The heads were machined and ready to go when I got it and the block had yet to be torn apart. Would like to go with different heads (currently 993 heads). Quite a few years ago, my son and I built a 400 for a '79 K10 he had at the time. I had a 327 parts motor at the house from a friends brother that had a 6" "T" cracked in both sides of the lifter gallery between the center cylinders! Procomp Electronics also supplied the 4.0-inch forged-steel stroker crank, which combined with the 4.125-inch bore produced the desired 427 cubic inches. If your bore is original and straight enough, reusing the stock rods and pistons with a 64 cc chamber can get you to about 9:1 if you deck the block. So many 383s have been built that stock 3.75-inch stroke 400 cranks are more difficult to … I have the heads I need. I think the pistons had a 22cc dish, comp was 9.8:1 with 64cc head. If you run a stick shift this may be the best option. THe reason isn't "HP", as such, but rather, RPMs. Even stock they are nice. I also dont 100% agree on the statement about finding engine builders in the shop. Finding the right one takes time and talking to alot of people to try and find a good one. Put a good set of 215cc - 230cc runners with good compression and a good cam and you'll have your 500hp. The thing was a grunt meister and lit up my 33x12.50 tires at will. More looking for what makes a good cam for these motors for low end too, this is a trail truck. Available $1,595.00. So I have been thinking a 400+ short block and an after market block is the way to go. I was really surprised at how strong that engine ran. Forged bottom end of course. And, stock rods need upgraded bolts (which have to be "special" 400 bolts", and then reconditioning, and by the time you do all that, you're more than halfway to a good set of aftermarket ones anyway, but you still have nothing but a … Custom Balanced race kits at CNC-Motorsports Ring size doesn't really matter. DCR is the actual compression that takes into account for valve timing. The block is fine too, built several 400's with 500+ in a street/strip application, a few over 600. down the tubes... not the first one I've seen do that, by far... one of my little brothers still has the piece of the crank sitting on his coffee table... A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. dark rosewood metallic w/ black top/stripes/int. He never responded to my email, this would make sense why, haha. There are 31 classic Chevrolet S10s for sale today on ClassicCars.com. Share. I currently have a 69' Corvette coupe with a ZZ3 small block, M-20 Muncie and 3.70 axle. Info. Not that any of that is "bad"; just, not necessary at that power level. You can either reuse the stockers or switch to standard 5.7 rods as mentioned. Thanks in advance Willy:beerbang Add to cart. Sold the car about 6 years ago.Daily driver and my only car for work for 4 of the 6 years I owned it. Tore mine apart yesterday. Also lots of good info on 400 blocks. I bought a 400 SBC block the other day. The 400 ci engines definitely make more horsepower and torque compared to the smaller cube small blocks. They are the bastard motor of the small blocks. Any recommendations on what makes a good build point for a 400 sbc? Hello! Not needed unless you really want or its going into a daily driver in rush hour traffic. For a production block daily driver I'd back off to about a 450hp 500tq goal. I have aqcuired a 400 sbc and want to build a performance oriented motor with an eye toward value and bang for the buck. Hi, I have a 1991 Chevy Camaro RS that has a 400 sbc in it. I was really surprised at how strong that engine ran. Engine has about probably 2000 miles since it was built. I have just a couple of thoughts to add. You need to make sure that the engine assembly is balanced correctly as they are the only one that are externally balanced. Just an opinion. For a better experience, please enable JavaScript in your browser before proceeding. The rods are 0.065" shorter than the stock rods to make up for the extra stroke. For 500 HP, there's no need for aftermarket blocks, exotic and $$$ racing parts, etc. Fresh 30 over rebuild that cracked during initial break in. 402/4sp bench. We started out with a stock rebuilt short block, bolted on a set of Vortec heads, and slid in a Comp XE4262 cam, performer intake and 750 Holley. I'm currently building a SBC 400 with 6 inch rods and an internally balanced bottom end. SBC Custom Kits: 383 Complete Engine Kit • 383 Stroker Kit/Stage 1 • 383 Stroker Kit/Stage 2 • 383 Stroker Kit/Stage 3 • 383 Stroker Kit/Stage 4 • 427 SBC All Aluminum • 434 SBC 650hp SBC Custom Builds: 400 SBC All Aluminum • 400 SBC N2O Street/Race • 400 SBC Dart SHP • 427 SBC Short Block • 434 SBC 650hp on Pump Gas Available $1,595.00. I built a 400 previously for a full size Blazer. Builders are like auto parts counter guys, some are good and some can't even get a spark plug off the shelf. SBC 400/406 Assemblies. Coolant in cylinders; fresh 400 sbc build I recently finished a 400 sb build that someone else started. Avoid choosing parts that are too "big." Copy link. More listings are added daily. Under resto. Add to cart. Make sure the block is Ok, then bore to .30 over. by rfoll » Wed Oct 14, 2020 5:22 pm. Along the same lines I would recommend a 'bathroom companion": "How to Rebuild Your Small-Block Chevy" by David Vizard (ISBN 1557880298) - I have original edition of this book dating back to early 80's, with all pages dog eared and oily covers. Marv, good catch on my CRS! Shooting for around 450 hp and 500 tq. Is there any way to push 500+ hp without it being a pain in the but to drive everyday?

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