how much hp will a ls3 block handle
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how much hp will a ls3 block handle assuming its fully forged/studded and about 416cubic inch, i would think the block would flex or crack before any internals went anywhere or broke? i see people makin 800's on stock ls3's, so i assume a forged one will take all you can give it? how would this compare to a forged lq block
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With good internals, 800-1000whp is pretty doable. You'll have the standard oiling issues at some point and it will be hard to keep bearings in it. The aluminum blocks are only so strong. They all flex eventually.
Jack
Jack
We pushed around 1050rwhp thru one with stock crank, forged rods/pistons, ported ls3 heads, ls3 intake, gts76 turbo with billet wheel.
Stock bore. Around 16psi
Stock bore. Around 16psi
Last edited by gnx7; Dec 11, 2014 at 04:46 PM.
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The mains and webbing in the LS3 block is stronger. 36% stronger than the LS1 block according to GM.
Also, the water jackets were slightly redesigned to strengthen to upper portion of the cylinder liners.
Also, the water jackets were slightly redesigned to strengthen to upper portion of the cylinder liners.
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The iron 6.0s are stupid thin between cylinders . we are talking ~.100 wall thickness. Just the steel liner alone is thicker than this on a ls3
I know this
A 4mm rod can fit between there easy.... So figure wall thickness with a 4.03 bore /4.4 bore space even perfect with no coreshift
I know this
A 4mm rod can fit between there easy.... So figure wall thickness with a 4.03 bore /4.4 bore space even perfect with no coreshift
Mine has been making 789rwhp for 3 years. Friends TT 5th gen was making 950rwhp before he decided to built it. Currently at 1145rwhp with his combo on 18psi. Plenty stock and forged have been making over 750rwhp for a long time.
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wow THANKS for all the repsonses i love having alot of opinions, and yea i wondering if it the ls3 was a better choice over the iron, but it seems like they both hold about all a 4 bolts head will hold down anyways..or 1000-1100 wheel? and i like the added wall thickness on the ls3's for sure!! so a fullly built one as badass you can build it, basically will handle 1k wheel all day? assuming everything else is done right
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The engine you sold me is going to make more power 
JK. Man the LS3 you bought will make more power than you will need. I think you will be pleasantly surprised. Fastest 18 year old alive ha ha
JK. Man the LS3 you bought will make more power than you will need. I think you will be pleasantly surprised. Fastest 18 year old alive ha ha
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yea that engine i sold you i was going to push hard!! and sold bcus was going lsx until i came across the ls3, just havent really seen many people on tech talk about boosted ls3's. lol but im tryin to be!!! i know theres probly rich 18yo's that can afford anything to be faster than me..but im probly the fastest f body thats my age??
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its also awesome hearing the info on how good the ls3 actually is compared to a 6.0, i know its supposed to be the strongest gm aluminum block, so if its as good as a lq block and its alot lighter.. i guess its the best thing next to an lsx or crazy rhs/c5r blocks
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and yea i mean with a t6 turbo maybe like 91mm and 22-24psi onna stroked ls3, that should make some damn power!! not what im running but awesome knowing the block can handle it
anymore setups out there? or opinions