What would be the max hp a stock block will hold if it a street car with some track use? Are roller blocks stronger than our blocks? Comparing & planning for a supercahrger. No nitrous. The race blocks cost to much at this point in time plus It might be overkill. I'm shooting for 500 hp at the wheels or more if its safe.
500-600hp on stock block i think is about right, might beable it get more out if you splice 4 bolt mains or use a main girdle, but 500-600 would be my limit just my .02
Yeah, I Have An Issue Of Car Craft Where They Got 400hp Out Of A Factory '91 5.0 Block With A Stock Cam.... They Just Swapped The Heads And Added Some Roller Rockers. So I Think 500 Is Very Acheivable And Easily Done
yeah you can make HP but think he is asking what the block will hold before bad things happen yeah that issue , i still kinda hard to believe 400 w/ stock cam
I had one crack making 375hp to maybe 400hp Good news was I reused everything but bearings,rings,gaskets. May have been a bad block
With a GOOD TUNE, you MIGHT be able to make 500+. I've heard of making 650 and more....for a while....but eventually they all do the same thing. Detonate one on a bad tune at 300 HP and it'll probably break. 302s are great little engines that actually fit in a Maverick chassis...but they have their limits.
The early pre-1979 blocks have thicker main webs and decks than the later roller blocks which like to split right from the mains up to the lifter valley. Consensus of most engine builders/racers is that the older blocks are ok for 450-500 hp, roller blocks 400 hp but iffy once you get to 450 hp.
any block that has a hairline crack will spell bad day at the track.. i often wondered what the max was as well. i know i am no where near max... but if you want a 350 HP motor.. what are some of the components needed ? i dont want to go 347... i was thinking a 331 stroker... or maybe not.. but what are the setups to get her close?
FWHP, as told by dyno operators. No need to stroke, that's an easy level for a 302. Good set of heads (easier w/aftermarket), Stealth or RPM intake, matching (or custom) cam, headers and a good exhaust. My combination shown in my signature should make, according to Edelbrock, around 385 hp. I'm a little skeptical of that figure, but I'm probably at at least 350. 'Course there's the magazine article where they slapped on a set of AFR 165s on a stock 5.0 a got 400 hp. I figured my roller cammed 347 with AFR 185s was making somewhere in the neihborhood of 420 hp before a rod let loose.
Thanks for the replys. I was thinking the block might start to go south at about 550-600 hp but was not sure. My current setup make around 310 hp but the ignition dont like to keep up with the revs, start cutting out around 4500. I just need the get a better system. But anyway I came up short so to help out the guys say a supercharger with a carb & low boost will add 100 hp with no problem. If it intercooled than you can run a little more boost to add another 50 hp. This is rwhp. I was thinking with a better ignition & headers I might be around 475 hp. But I was wondering is that going to be 2 much. If it can hold up for a year or two, maybe I can get a better block.
Iron GT40 heads, 600 holley, I forgot the cam but around 280 or 284roller, & headers, on a 302 should also get you close. i often wondered what the max was as well. i know i am no where near max... but if you want a 350 HP motor.. what are some of the components needed ? i dont want to go 347... i was thinking a 331 stroker... or maybe not.. but what are the setups to get her close?[/QUOTE]
What kind of power would the newer H.O. blocks hold, arent they a little stronger due to high nickel content.
