Sbc 400 compression test. 2:1 compression on pump gas .
Sbc 400 compression test 2 compression ratio and with 76cc heads will have 7. Prior to hooking up the electronics, we ran the EFI intake with a carburetor. May 2, 2008 · As mentioned above get the starter mount end brace to supports the end of the starter and bolts to the block. cast #186 he Sep 2, 2013 · Hello, this auction is for a pair of completely assembled aluminum small block chevy cylinder heads. I did a compression test and every cylinder was 175 to 178 psi. 9*C Here is the engine build for this test: SBC 406 10. These heads will fit all 262-400cid engines from 1955 through 1999 and are nearly identical to ProComp Motorsports heads part number P3002S. Vacuum line runs to ported spark, not full vacuum manifold We built a "327" SBC the hard way by combining a 283 crankshaft and a 400 block. its got 4 valve relief flat tops, comp 270 cam . 050 . So I was wondering if that compression Is considered to be low? May 30, 2005 · Question on what you all think I should do with this engine. Reviews. Running 104 octane race gas, it made 642 horsepower and 568 lbs. . The cam is a Crane 113941, 216/228, 272/248, 112 lsa. . Pulled off the head and as expected the head gasket was blown between 4 and 6. GM dealer item or JY. I suspect a broken valve spring as the cause. - Car Craft Magazine Jul 31, 2020 · I'm with Hutch. 740" crank throw + 5. The are just restalled gm oem 12" 2200 stall th350 Converters. 0 while the same engine with 76cc chamber heads will have a 8. Feb 3, 2015 · The LM1 engine found under the hood of a Z28 shares the same key internal dimensions the non-Z28 350-cu. Dec 16, 2013 · -317 casting 400 bored . 030-inch 350 with a 4. but that's for smaller, less racy hydro rollers in cruiser type builds. Mar 5, 2024 · Most gas engine’s compression should be between 125 and 175 PSI while a diesel will generally fall between 275 and 400 PSI. If you want to run regular fuel you may want to call one of the cam makers and choose a slightly different grind to reduce compression. I have a Burn 2 Chip, and due to the noise of the camshaft on 400 (no roller) It was recommended by a few to disable it. 5:1 compression Apr 16, 2022 · And about 2yrs ago, we built a hyd roller 400 for my son's 73 Corvette, with GM massaged 400 heads-----BB performance. Another commenter stated I would need to run at least 91 octane (which I'm fine with) Sep 15, 2014 · A simple compression test will tell if the valves are too tight. With the engine cold, all 8 cylinders ranged from 170-180psi. I tested the compression of each cylinder which came out to be around 125 for each cylinder. This was measured from the drive wheels. The SBC 400 is the only small block engine in the Chevrolet V8 line. Apr 24, 2007 · HERE is what i have a 1955 chevy w/ 400 . It is best to test with the engine warm, but I was just looking to see what the variation looked like. Mystery 454 unknown internals, been sitting for years in the shed. I have have a few people tell me that it must have some type of upgraded piston in it. i assume it had 882 casting or the like 76 cc heads when complete. May 1, 2011 · Assembling the 400 Small Block. Aug 15, 2019 · Modified BPE 400 SBC — NA vs. 050 deck height Pro-comp 210 aluminum heads, 2. I'm consuming 1 quart of oil every 150 to 200 miles. However, the side of #6 was burnt through the top ring. Looking for thoughts on my compression test results as shown in the attached image. Would putting tese on the 305 in the '84 hurt more than help? but guessing 76cc heads will give you a 7:1 compression Apr 12, 2014 · The stock chevy block, not so much due to the main webbings. In 5,000 miles and three different checks of the cranking compression, it has dropped from a high of 190 to as little as 120 pounds. 02/1. 7" rods mahle flat tops with reliefs for pistons 236/242 hyd roller 111lsa, +3 advance ground in . Engine specs listed Mar 15, 2023 · Doing a compression test, is a good way to measure the condition of, the rings, cylinders, and valves. No worries about piston compression height, stroker clearanced oil pan, small base circle cam, rod to cam clearance. I have a 817 block sbc 400 that was recently rebuilt by my mechanic buddy and me. This is because the condition of the battery, variations in ambient temperature, and the effects of the presence or lack of oil (if the engine has been sitting) around the rings which helps seal them, can all affect the results. This engine comes with Blueprint aluminum heads which have a 220cc intake port and a 64cc combustion chamber which puts compression at 10. 200 dome. I am thinking they did a hot test with high torquing starter, engine build was pretty much spot on the same. 93:1 compression Weiand stealth intake manifold Quadrajet HEI headers w/ 2. When the oil is at full on a stock dipstick, it nearly touches the rod bolts at the bottom of their arc. Aug 1, 2008 · With more than 15 inches of vacuum and 175-180-psi cranking compression with either head, this setup is optimal for an entry-level, 10:1, 355ci small-block Chevy. Jun 15, 2011 · A leakdown test is simply performed with the engine at TDC of the compression stroke, for each cylinder. 50:1 compression ratio, two-bolt main bearing caps and hydraulic lifters. 17 years ago my son was born so i sold the nova thinking i wouldnt be at the track no more. 8:1. 560" compression height = 9" Feb 2, 2014 · I like a superstat 195 for daily driver/work sbc's and a superstat 180 for running weekend warriors, street/strip, high compression, big cammed sbc's. Will the compression test really tell me anything about oil consumption? Apr 7, 2011 · Was looking at fast burn aluminum heads and a compression ratio around 10. Our 329 SBC's first dyno session revealing valve float. 6:1 I have about 6000 miles and never had the need to check the compressions yet. 1956 210 del rey sedan 383 700r4 12 bolt posi. 7 compression ratio. 672, 256/264, 108, solid roller cam with 4/7 swap •Morel Ultra Pro lifters •T&D 1. The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain: small block 400 engine compression Dec 9, 2002 · I was thinking it was HRM for some reason - maybe thats why I couldn't find it. always use torque plates when finishing the cylinders. This makes a compression test only a mediocre test at best. 3 compression. A 400 with a set of AFR 195 Eliminator heads, a hydraulic roller cam like the XR282 or 288 a dual plane intake and you are there. Remember to write down each of your findings. Scat 9000 Cast Crankshaft 3. So, if your engine is running rough or is lacking power, consider doing a compression test. They built a 12. hyd 500 lift cam and a set of 76cc 882 heads on it 2. Chevy Firing Orders. That said, the SBC 400 had a gross horsepower rating of 265 horsepower and a net rating of 150 horsepower. 040 suddenly you've got a meat eater that's happy on 89-91 octane pump gas. The 406 made 618 horsepower and 559 lbs. What do you guys think? Worth a shot dropping it in and giving it a try? I can see a double roller chain thru the gap in the valley so someones been in it. I don't recall if we did that test before or after we ran the boat on the lake. I want to put on a set of 462 64cc heads what i'm looking for is what is the compression ratio on the motor and if i change to the 64cc does anyone know of a site that can help me out. 2 compression ratio. The last 400 I built (but milder ~450hp and 10. Pay attention to windage on 3. Compression tests mean very little because of the cranking speed of the starter, battery life, inconsistency, etc, etc But that being said, your wet numbers look . ProCharger F-1A, E85 (non IC) Our first test with boost was to install the ProCharger F-1A supercharger and run it on the injected small-block using E85 and no Mar 11, 2018 · 400 sbc compression Jump to Latest 8K views 6 replies 7 participants last post by camaro_fever68 May 21, 2018 Jun 5, 2014 · A cranking compression test won't tell you what the Real compression ratio is. 2. 00 x 3. An 305 engine with 5cc flat top pistons and 58cc chamber heads will have a compression ratio of 10. Someone I spoke to said these are pretty high for an SBC350, but it could just be a very stock cam (limited/no lobe overlap, increasing compression on a test). But there's no saying for sure w/o checking. in small-block: 4. Also, it is important to perform a compression test every time a tune-up is done, as part of preventative maintenance. Sep 21, 2009 · I have a sbc 400 2 bolt main out of a 1977 chevy truck the heads on it are the 882 76cc chamber. Every spark plug has oil on its threads. May 6, 2009 · I recently bought a complete SBC 400 engine that's been sitting for years in a climate control building guy said it was pulled out of a wrecked car but was running I want to do a compression check what are good compression numbers to look for?Thanks Nov 16, 2009 · To me, a 427 SB is overboard for that goal but that is JMHO. 60 64cc chamber calculates to 412. Factory 2 or 4 bolt blocks are about the same strength wise since either will hold up to more power then the deck of the block can withstand unless you O ringed the deck. the low-compression 400 managed to make 376 hp and almost In this video I describe the 2 400 SBC engine builds that I have in progress. It has nothing to do with steam holes, but everything to do with sheer cubic inches. Did a compression test, all cylinders except 4 and 6 were at 150-155psi, 4 was at 100, 6 was at 40. 48 LR, low compression (calculated 8. Videos. 5" dual system 2. 680/. Air coming from carb is from a leaking intake valve. 6:1 compression ratio. It currently has a Compcam 274 flat tappet in it and I dont like the lack of Dec 3, 2008 · What pistons are in the "recently rebuilt small block 400" ?? Stock type 12cc dished w/58cc heads get's you around 11. 6 shaft rockers •Comp Cams billet double Feb 18, 2024 · 1971 sbc 400 ci. of torque on E85. EFI Part of the upgrade performed on the small-block 400 was the installation of a single-plane, EFI intake from Edelbrock. assuming this how much compression could be expected if a 64 cc head would be used with a stardard felpro blue gasket set ?? i can't find a compression Apr 6, 2022 · 400 sbc Cast-iron 3973487 heads (76cc) - the early LOW compression hi-perf engines (ie Vettes, 71-72 Z28s) Holley Truck Avenger Carburetor (670 cfm) MSD Pro-Billet Distributor (8360) with vacuum canister (point-style). If you fix the . 30 over (406) that has pop up dome pistons i think around . it is a 511 casting two bolt. Buyer's Guide. 580 lift both intake/exhaust johnson hyd roller lifters afr 220 heads race ready port version holley strip dominator single plane intake 4 hole hvh 1" spacer 1/2" of it sits recessed in the intake Oct 17, 2015 · i bet you can rent one from an auto parts store. Oct 7, 2014 · Just looking to see what other peoples combinations with stock 400 chevy small blocks are resulting in numbers wise. Motor is a 350 TBI 1994 C1500. Static compression was 8. you've gone beyond that cam/rpm wise so you need more spring. News. My camshaft recommendation was based on the 1. The 400 SBC is in Big Block territory, and cooling system needs to be setup accordingly. 3:1 I have a new set of AFR 195 Eliminator heads with a 65cc combustion chamber. Jan 1, 2012 · Because the cam is relatively mild, this may not have happened. - fordman66: 12/12/2024 14:06; RE: How to do a compression test and leak down test on Chevy small block quesions. Im not sure of the stock compression ratio but i think its 9:1 (each piston has a 9 stamped in it). I have aluminum heads they ran vortex heads. 750, with a 7/16 6 inch rod and a Mahle piston, we ended up with 10. My engine has a bit over 500 hours right now. That was with a different compression gauge. 030-inch Dec 4, 2022 · The 350 small block chevy has been swapped into just about every chassis - in later years the 383 sbc became the swap of choice thanks to its increased low-e Apr 6, 2020 · Did a compression check today, motor has been surging badly at idle until warmed up. NOPE, don't discount what can be built from a good 400 core, ESPECIALLY when a small block is needed to more or less retain a stock SB look ----- such as for a 55-7 Chevy. It debuted in 1970 and went into production for ten years. Aug 16, 2019 · Modified BPE 400 SBC — NA vs. 155 bore x 4. Nov 27, 2021 · •434 cu in Small Block Chevy •4. We also used a smaller 750hp Holley carburetor instead of the 850 Ultra HP employed in the single-plane test. 02 valves750 Holley, victor jr intake, and a good msd350t trans 3500 stall and a 9in ford rearend w/ 389 gear,,, shifts at 5500 rpm the car only has been running 12,98 on Feb 16, 2012 · Head studs are a good idea for this application, be carefull to get them sealed, the water will come right through the threads at the nut on top. 9. The flat tops were matched to these rods. Dec 7, 2002 · What's the best way to achieve a moderate compression ratio around 10:25:1 on a 400 SBC? Is it better to use flat top pistons and a larger combustion chamber (74cc) in the head, or to use heads with average-sized combustion chambers (64) and dished pistons? Sep 26, 2018 · A great case in point is Ford's much maligned 400 with the piston crown . Run with the carb, the modified engine produced 524 hp and 486 lb-ft of torque. CNC - 3 points compression change alone is worth roughly 56 HP according to DD2k when going from 9:1 to 12:1 on a run-of-the-mill 400 HP 383 small block. I also describe problems that I have encountered including tight rod and main b Aug 25, 2014 · question for all the pontiac guys: I have a pontiac 400 (406) KRE 74cc alum heads, mild crower cam Pistons are not the best just TRW stock replacement with 4 valve reliefs The compression ratio is around 9. 080 inch down the bore, that engine will ping on 110 octane av-gas with only an 8 to 1 compression ratio. 700" rods + 1. ) Attached a pic of the dynamic compression ratio calculator and it comes out just a hair over 9:1. 56 gears and high stall converter. 25-1 compression 300 hp 380 ft lbs tq @3200 rpm 1970 350 2bbl 9. Dec 7, 2014 · small block 400 engine compression Engine & Drivetrain. Dec 12, 2016 · The piston slap when it is cold was happening when it was carbureted, I think it just got a top end overhaul before I got it. Dec 20, 2006 · 1970 400 2 bbl 9. A 400 because of the longer stroke and bore creates more compression than a 350 with similar deck, cam and flat tops. It’s a 79 SBC 400 that ran like crap. Jun 22, 2024 · Needs compression & 3500+ stall. May 23, 2023 · Our test engine is the same 406ci small-block we used for the single-plane intake manifold test, with a change to more conservative cam timing that is closer to what would be typical for a dual-plane intake manifold–equipped engine. What is the piston brand And part number? Was the block decked when machined? Most of the mild "2500 stall" converters suck. Nov 20, 2012 · Swapped in a '74 SBC 400 in place of an oil burning, oil leaking, under-powered and tired 305. it is from a 73 impala csa code 150hp 2 brl rpo is lf6. 4 days ago · Externally balanced. This engine performed very well for what it is. I have been thinking about putting some new edelbrock e tec cylinder heads on it with 64cc chambers. I built it for $500. The cam is hyd roller, 234/238 @ . Let’s delve into the specifications of this iconic engine. My plan is to clean and check of course, then run the same rods (resized as needed) and pistons, turn the crank, and hone the block. Magazines. Nov 8, 2005 · im wondering what i kind of gains and compression i could get out of running a set of 350 vortec heads on my sbc400. High compression is easily achieved on a 400 sbc. 5 to 1, cam somewhere in the 230-240 duration and lift in the mid-500's on a 113-114 centerline, Edelbrock air gap intake, Holley 850HP carb, headers with x-pipe exhaust. Feb 13, 2024 · Chevy 400 Small Block Engine Specs. Pre Oct 28, 2021 · The cold and dry test should not present more than a 15% difference between the high and low cylinder, my preference is 10%. Oct 12, 2024 · The 400 in my truck burned an exhaust valve. just a bolt together deal. The Chevy 400 Small Block engine is a legendary powerhouse known for its performance and durability. You can hear where air is leaking from, to determine what is leaking. As I recall, I got about 175-185 on the cylinders on that one. 060 over, stock style replacement dish pistons. the dealer specified tool is J 26999 Compression Gauge if you want the GM tool specified for the May 23, 2007 · I have a set of 1980 400 small block heads. Jun 3, 2014 · Hi this is my first post here so bare with me. 565" rods + 1. ProCharger F-1A, E85 (non IC) Our first test with boost was to install the ProCharger F-1A supercharger and run it on the injected small-block using E85 and no May 21, 2008 · If your deck is zero on a 400 I would not consider anything but 76 cc aluminum head. Aug 24, 2020 · All music created by www. the pistons have a dish. The oil didn't change the compression any. Sep 30, 2013 · Compression test results can be inaccurate and inconsistent. 7 engine has a knock did a compression test at 280k today. That camshaft is way too small for 400 cubic inches, we don't know what your final compression ratio is and that is too small of a carburetor for 400 cubic inches with any decent cylinder head. Cyl 1-170, cyl 3-170, cyl 5-90, cyl7-160 Cyl2-160,Cyl4-150 , Cyl6-140, cyl8-170 Any reason for low compression Oct 1, 2004 · A crank compression test can tell you a lot about an engine and we will be going over the numbers. Compression test with a push in type tester 100-110 psi. May 6, 2009 · I have a sbc 400 engine that ran fine on the engine stand I did a compression test and leak down test and everything looked good but today i looked at the sieds of the block and it looks like cracks on both outsides of the blockone on each side see pictures, is my block cracked?Thanks Aug 13, 2006 · my buddy has a stock std 400 short block that he wants to go thru. 25 to 10. ford 400 compression test|My SBC 400 Compression Calcs : suppliers tried the search function---got way too confused for my own goodran a compression test on my F250 today (400 cid) and got numbers ranging from 95 psi to 125psi. Oct 21, 2023 · 1. Try a17 ratio rocker also May 1, 2009 · The number 8 cylinder on my 350sbc is fouling its plug every 400 miles. 0-1 compression 265 hp 400 ft lbs tq @2400 rpm 1970 350 4bbl 10. You guys can keep telling him that go for it 500 hp is safe on a 400 sbc, but my engine builder even told me, 400 hp is very skeptical on a 400 sbc block without any detonation problems with a forged bottom end. 4 bolt mains are weaker than 2 with these. I got readings of 165-170 on all cylinders. 72:1) and the small intake ports. 67 cid with 8. Magnum 280H-10 May 13, 2013 · According to the numbers I decoded from the 1970 350 I just bought it should be "300 HP" and 10. What is good compression for a small block Chevy? Dec 10, 2015 · Opinions on a compression test. 25-1 compression. i drove a 72 nova on the street for over 30 years with very high compression 482 cubic inch big block, 4. Already checked vacuum leaks, timing, etc. The rings and pistons look good and the engine does not have blow by. The difference between the dry and wet test shouldn’t exceed more than 20 to 25 percent for any cylinder. per all data, make sure you have ALL of the glow plugs removed when testing, engine RPM must be 140 or higher and 300 PSI is the minimum pressure, 50 PSI is the maximum variance cylinder to cylinder. 30 over,KB dished pistons,standard rods,Profiler All American heads with 202 intake 195 runner and 72cc chamber. see if you can find somebody that has a stock hei distributor and coil, you could borrow. 155 X 3. There is not a direct correlation between compression ratio and compression pressure because of cam timing effects. 75" stroke motors. 750 hp carb, 11. A leak down test would tell you what you need to know, a compression test will do if that's what you have to work with- just check the p-rods and realign the cam gears first before testing. what you need is a cylinder leakdown test to tell you exactly what is wrong with it. I did a compression test too and all cylinders are between 148 and Nov 9, 2021 · thank you very much guys,im building this motor for a 92 foxbody. 268/280 Advertised duration224/230@. the current heads are 882 heads that have been pocket ported, triple angle valve Jun 9, 2013 · He's good with the stock 400 SBC short block and the Edelbrock Performer RPM cylinder heads. 875" crank throw + 5. 2:1 compression on pump gas Feb 1, 2005 · - Dynamometer test session results for 400 Small block Chevy-Ambient air temperature: 18. of torque. 560/. 7:1 static compression) had no detonation as long as the tune was right and you really wanted to run 93 with it, not the 91 octane. Save Share NA Modified BPE 400 SBC — Carb vs. 560" compression height = 9" 350 SBC = 1. You need a 1 and 3/4 in preferably 1 7/8 inch primary header and 3 inch exhaust to let that thing breathe. Compression test were decent, but one cylinder on the passenger side was lower. Jun 23, 2023 · Did a compression test cylinder 1 has 100-120 psi. It has a new Scat crank,is bored . - Kingfisher567: 12/12/2024 14:13; RE: How to do a compression test and leak down test on Chevy small block quesions. The less you can bore the cylinders the better. A compression test is simple to learn and only requires a few basic tools. Compression test results are: 1) 145 2) 140 3) 140 4) 145 5) 145 6) 145 7) 145 8) 150 OEM SBC GM 4BBL intake manifold, spread bore, casting number 346250 - $150 Edelbrock Carburetor, 600 CFM, square bore, electric choke - $135 Mar 24, 2023 · SBC 400 stock bore/stroke - world motown block 5. 080 back to around . 700 I-Beam Rods, Keith Black Hypereutectic -5cc Flat Top Pistons, 2-PC Rear Seal Learn More NA Modified BPE 400 SBC — Carb vs. Spring you've got are listed as for hydro roller use. - Super Chevy Magazine. 48-inch bore and stroke, 8. not saying its better than yours, just saying I have no problems running a stock Nov 17, 2009 · As for the 400 block prep,always deck a 400 block to make it truly flat. Modded by bending thr fins more, increasing clearance and or Apr 19, 2022 · I have a 1971 chevelle with a 400 small block. 750 Stroke, 400 Main, Scat 5. Results #1 170 #2 180 #3 100 #4 182 #5 92 #6 175 #7 180 #8 182 Added Oct 13, 2020 · I've verified my rods are stock 400, 5. com ! Nov 7, 2012 · Here is some examples. just to experiment with. I used a Sig Erson RV camshaft in the 400 SBC that I built for my pick up. 656. BenSound. Mar 24, 2021 · I have a mildly built 400 in my '57 Chevy and just did a compression test on all cylinders just to check engine health. Basically stock short block otherwise with HV oil pump. Cylinders 2-4 all have 210psi. Sep 3, 2022 · I have a 400 sbc with 125 compression per cylinder. Still much lower than the 185 that is average for the others, but about double the dry compression test. I then went to harbor freight tools and bought a leak-down tester and put it on #3. 5 to 1 cr. Comes with a harmonic balancer and valve covers (red, not in photos) Price is $400. I first did a dry test and then a wet test with a little oil down the spark plug hole. test engine. Apr 11, 2021 · Buy High Torque 3HP Mini Starter 18492 Replacement for SBC BBC 350 400 Dual Inline 168 Tooth Ring Gear 350 400 (up to 14:1 Compression Ratio) we test each May 3, 2010 · I was able to test all the cylinders. Jan 16, 2008 · I recently did a compression test on my 69 that I just bought, it has a 71 400 small block and the numbers that I got averaged out at about 230 psi. 0-1 compression 250 hp 345 ft lbs tq @2800 rpm This comparision shows that with less compression and a 2bbl carb the 400 is equal if not superior to the 350 with a 4 bbl and lots more compression. Stock 400 short block with Vortec heads, headers, Performer RPM with a Quadrajet. NA Modified BPE 400 SBC — Carb vs. New SBC 400 Won't Fire - It RUNS! Aug 3, 2018 · I checked compression on another 94 PS 190 with 350 TBI when I was shopping in 2013. I am running a very stock 350 with 76 cc heads. As well as lots of smoke when it’s running. 4:1 compression, 406 cubic inch small block Chevy by combining the good parts from the broken 360 with a bottom end based on a block from a 400 cubic inch small Chevy. Does this seem fine for 76's? I will be adding vortecs with a 64 cc. 73 rear gears Aug 11, 2023 · Typically to turn more rpm you would neat something like 145-160# seat with 375-400# open load. Jan 17, 2010 · Compression Testing and What You Can Learn From It - EricTheCarGuyHere is a video on performing a compression test on an engine to assess it's mechanical con Dec 12, 2024 · RE: How to do a compression test and leak down test on Chevy small block quesions. May 28, 2020 · I recently stripped down my 350 small-block Chevy because of loss of compression over the last three years. he suggested we also test a set of the GM Performance Products large port Bow Tie Vortec heads. Jul 20, 2005 · i am putting new heads on my 400 sbc and i was wondering what compression i would have if i went from the current 76cc head to a 64cc head. Feb 18, 2008 · I have finally got around to testing my compression on my SBC before my rebuild to drop on new heads and cam. Our 360ci Small Block Chevy dyno mule is broken! So, we’re going to take the parts we can salvage, put them in a bigger 400ci Small Block and turn it 7000 RP Jun 6, 2020 · Also reason I checked is I seen a hot rod mag cam test article where they ran 5 cams, one of the cams was xe268 and they reported 175 on compression test, all testing was done at west tech. well now im building the foxbody for my Oct 6, 2017 · Hi guys, I am looking at purchasing the 508HP Blueprint Engines 400 Long Block. History of the SBC 400 Debuted in 1970. - cyclones30: 12/12/2024 14:25 Jun 11, 2023 · Stock rod length 400 SBC has a 1. i raced it every weekend and most of the time i drove there. Came out of a Nova that had a few goodies, headers, "Thunder series" double pumper, Torker II manifold, vacuum can, MSD pro-billet distributor & MSD "Blaster SS" Coil. I then did a wet compression test on #3 by putting about 30 mL of 30w oil in and then the compression jumped up to 120psi. 530 lift on a 110. Comp advertises 357 with crap old time SR head’s with that cam, headers and decent intake. 470 lift, 224 duration, full length headers, running a performer intake which id still run for the vortec style heads, customized 650 double pumper. 000 stroke •11:1 compression •Dart SHP block •Callies crank •Scat H-beam rods •CP Carillo Bullet pistons •AFR 245 NPP heads 70cc •Custom grind . No carb or intake on it. 030 over bore Extreme energy cam shaft hydraulic flat tappet. Oct 1, 2009 · The crew from RaceKrafters Automotive Machine will show you how to perform a dyno test on a TPI Chevy small-block engine. 050, 477/480 lift. Another 305 engine with D cup 12cc pistons with 58cc heads will have a 9. -ft. Taking the Scharader valve out of the compression tester hose and blowing compressed air into the cylinder while on tdc it has a lot of air coming out the oil fill. The Future Oct 14, 2004 · a compression test wont confirm engine work that needs to be done. the size of the camshaft in relation to the compression ratio of the engine could very well create 110 psi in an otherwise healthy engine, with the only problem is that the cam is entirely too big. Get a heat reflecting starter motor wrap and shield the starter from the headers heat. From a mechanical perspective, you will need to know how to properly remove the spark plugs on the vehicle or equipment you are testing and properly disable the ignition system and fuel system, the latter if the vehicle is fuel injected. 56" compression height piston GM did the Ford trick of lengthening the stroke and shortening the rods Most aftermarket pistons are for long rod combos 400 SBC = 1. Apr 13, 2007 · The head’s and cam you have with the right supporting cast will make a 350 pump out an easy 400 ft lbs and 400 horses on an engine dyno. I autocross a lot and I started to get blue smoke on deceleration so I pulled the plugs after my last event Nov 17, 2011 · As a sequel to our ultralow-compression 400 from May we build a 406ci small-block Chevy that can make 501lb-ft of torque and 466hp on pump gas. This V8 engine was produced by General Motors from 1970 to 1980 and is still highly sought after by automotive enthusiasts today. Another commenter stated I would need to run at least 91 octane (which I'm fine with) Aug 29, 2019 · 1997 k1500 5. It's a 355 small-block (+0. So I was wondering what compression ratio that would make? Mar 26, 2020 · I had a very nice thick 817 production block, bore and stroke 4. It appears to have been rebuilt once, but the block was not decked. 22cc dish. If one or more cylinders looks to be way off in PSI, you can re-run the test again just to check. On top is a Speeddemon 650 on an RPM intake. wlflhw hfajg wxnw irpi hunrjku meiekr rsrym apxq umk jppq