5.0L FORD BLOCK SPLITTING-FACT OR FICTION?
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- čas přidán 30. 07. 2020
- FULL 5.0L FORD RESULTS. DOES IT REALLY SPLIT AT 500 HP? IF NOT, WHAT IS THE REAL NUMBER? IS IT POWER? IS IT TORQUE? IS IT DETONATION? CHECK OUT THIS VIDEO WHERE WE RAN 10 DIFFERENT 5.0L COMBOS AT OVER 500 HP USING NITROUS, BLOWERS AND TURBOS. PLUS STORIES ON MY OWN SUPERCHARGED 5.0L RUN AT WOT FOR 32 MINUTES-DID I EVER HAVE A 5.0L BLOCK SPLIT?
I have been racing small block Fords for almost 40 years .l have had 302 blocks with close to 600 hp and never split a block but back then there was no internet maybe that's why I never split a block.
I built and refreshed a .040 over 289 for a guy years ago. Every year his budget got bigger, but he wouldn't have a 302 or 351. Cast crank, side ground and shot peened stock rods with 5/16 ARP rod bolts. Got the compression up past 12.5 -1, roller cam etc. I begged him to keep it under 6500 rpm. Engine lasted 2-1/2 years until the stock oil pump drive broke at around 7800 rpm. Replaced the crank and 2 rods. Back at the track in 6 days. Car still has same block today, 38 years later.
Probably casting lottery. Imperfections in the castings.
I know exactly what the problem is, the problem with the 302 is... It is not a 4.8, 5.3, 6.0 LS engine.
Personally I blame squirrels
Well.... didn’t we just talk about this? Thanks Richard 💪 keep the RPM low and good harmonics
My stock roller block 347 with twin turbos made 700 to the tyre and ran 9.3’s at 150 for years and never split a block, broke plenty of gearbox’s, I always only ran race gas and meth injection at the track so I think it has a lot to do with detonation or bad tune.
I’ve been running a 95 roller block for 2 yrs now. It’s on a 200 shot of nitrous, heads cam intake carb set up. It’s at 602 hp, no issues at all. About 120 10lbs bottles thru it, still strong.
Ran a .030 over 302 for 3 years, 5,6, sometimes 7 passes a night 3-4 nights a week with 100-150 shot of gas every pass. TRW power forged s*"get pressed pin pistons, stock rods, back yard ported 289 pistons with bigger valves. Never had a problem. Took timing out for nitros passes. However,,,,,,, before that motor borrowed a plate to shoot for street race. New to nitrous, didn't take any timing out!!! Dumped a big shot of gas on it with bout 37-38 degrees of timing. Blew both head gaskets and cracked 5 pistons. Made it home! The block didn't crack!!! Reused it to race 3 seasons 4 nights a week. Don't know how they manage to split a block? 500 shot of gas????!!!
I saw a 600hp+ 347 stroker split. The crank was in great shape after the failure and was measured to be over 100g out of balance. With the short deck, I think it is because of high RPM without having an internally balanced rotating assembly.
This guy is awesome been watching all his videos lately. awesome work and so much time gone in to all this
being a machinist my guess would most likely be an inconsistency in the casting material/block, things like the way its cooled after casting can effect and impuritys in castings, hard spots, air pockets,softer than normal blocks,core shift ect there are many reasons a block could split and it might just be the block at fault as mass production some times cuts a few corners to make production numbers.people used to let blocks bake in the sun once to harden them up not sure it works thou
Mickey Thompson ran many different blocks at high RPM.
Being one of the old farts around here, and being a small block ford guy, I was always told via magazines that the hydraulic roller blocks could develop cracks in the lifter valley out past 550/600hp and could for short term run 750+. And that early non roller blocks could take more sustained loads and rpm. I've never seen a test showing that problem, I have seen split blocks, but not the circumstances why they were split. what I've never understood is how a 2 bolt main block could keep the mains in it long enough to split the block.. I've always figured it was detonation that killed the block, not the actual hp number. And this probably stems from 1 guy with a bad block on a dyno and a couple turbos not retarding timing, and people perpetuated the myth.
Detonation and RPM. Another great video Richard!!!
Running 13lbs on my explorer p-head block with only aftermarket pistons. The assembly was balanced with the lighter pistons. This video gives me some confidence to upgrade to AFR heads and shoot for the 600 mark!
It’s when the stock harmonic balancer comes apart and the motor “ shakes the baby “ until bad stuff happens.
WFO for 32 minutes!? Dude you are a hero :-)
So cool , Love when myths are explained and sometimes busted , great video learning so much with every video thanks
It's gotta be the flowmasters.....