Alot of performance shops have been telling me that with a stock 302 block they can handle only 500hp before you break stuff and crack the block I was wondering if thats true cause I have a stock block with about 380 rwhp and I wanted to get a supercharger and push as mush horse's as possible.
True or Not !!!
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BrutalStang
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1EVIL88VERT
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try the search buttom their has been alot of debate about this subject.....general view being 500hp and up you have a time bomb....
And others are over 500 HP with no issues. It is all in the driving mentality, build (how the powerband is, method of achieving that HP), tune, etc.
I would not want to take a chance on scrapping internals with more than ~450HP myself, but that is kind of conservative.
Good luck.
I would not want to take a chance on scrapping internals with more than ~450HP myself, but that is kind of conservative.
Good luck.
To the best of my knowledge anything over 450rwhp is considered a time bomb...however there have been people with as much as 600rwhp on a stock block...however I would not recommend it. Check out www.turbomustangs.com for more information...but if I were in your shoes...i would be getting a new block
mbsprinks281
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04sleeper
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Might I ask what combo you are running to get 380 RWHP with a stock block?
And your garage says 404.7 RWHP?
And your garage says 404.7 RWHP?
Paul Perreca
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- Mar 30, 2005
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The internals are not the problem.. I think there were forged internals in the 5.0 until they moved to hypereutectic in 92 or something, not sure on the year. The block can't handle that much power and cracks. Haven't heard of any internals alone breaking under that kind of power unless there was another problem as well.
Dbeck002
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The rule of thumb for the 5.0 is 450 RWHP. Yes people have made a lot more but that is rare.
I'm pretty sure that if you were to slow time down in your engine making 500 HP and wanted to see what breaks first, stock internals or stock block. It would probably be the block.
Block begins to crack, crankshaft experiences the smallest bit of bending and cracks, after crankshaft cracks the rods are forced to twist to an angle and bend while cracking pistons or breaking other sh-t. Generally this is what happens.
I'm pretty sure that if you were to slow time down in your engine making 500 HP and wanted to see what breaks first, stock internals or stock block. It would probably be the block.
Block begins to crack, crankshaft experiences the smallest bit of bending and cracks, after crankshaft cracks the rods are forced to twist to an angle and bend while cracking pistons or breaking other sh-t. Generally this is what happens.
1986 H/B 9.5 to 1 hypertecnic pistons, ARP bolts, 6.5 quart oilpan, cloys timing chain, clevit bearings and chromemolly rings. Motorsport E303 cam, motorsport high rev lifters, motorsport hard-end pushrods and Crane 1.7 roller rockers 70 bbs throttlebody, Trick flow heads, Elderblock intake manifold, 24 pound injectors, Trans is a comp c-4 three speed reverse acting with a hurst shifter with line lock, Rear 4:10 gears, Mac long tube headers and flowmaster exhaust, sub frame connectors ford posi unit, New interior just did switched to dark gray, These are my mods on the car.
go to the user CP and paste all of that in your signature so it shows up every time you post.
That combo doesn't look to me like it would produce 380rwhp....maybe 280rwhp? How many cubic inches is it? Although your compression ratio isn't really high, I wouldn't put too much boost on it...optimal compression ratio for forced induction is lower than 9.5:1.
That combo doesn't look to me like it would produce 380rwhp....maybe 280rwhp? How many cubic inches is it? Although your compression ratio isn't really high, I wouldn't put too much boost on it...optimal compression ratio for forced induction is lower than 9.5:1.
TheUser said:
Roger that.
I run a somewhat similar combo with TFS heads and a blower and don't put 380 to the ground. Those 24 lb injectors won't handle that kind of power unassisted either (by that I mean your FP would need to be between 60 and 70 psi). You didn't say where the block came from (or maybe I missed it) but 86 pistons are forged. If the block is rebuilt there's a good chance that your bore is .030 over then god knows, what pistons you've got in there. I can't imagine anyone wanting to rebuild an 86 block (or any for that matter) with hyper pistons unless he was just doing the buld to sell the car. I would be VERY suprised if you were putting even 280 to the wheels. Time for a trip to the dyno and get an idea of where you're really at. 
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