ls3 blocks are they stronger? anything else diff on them? are better?
TECH Enthusiast
Joined: Dec 2001
Posts: 548
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From: Dublin, CA
I'm near done with a forged LS3 for boost setup. The shortblock and parts came from Bruce @ PowrMax, great price, professional work.
Diamond L92 pistons, Compstar crank and rods, 4.060" x 3.622" (376ci), LS3 block, LS3 heads, Stainless intake valves, Comp 921 springs, LS7 lifters, Synergy custom cam, L76 manifold, customized LS2 fuel rail, 75lb injectors.
Diamond L92 pistons, Compstar crank and rods, 4.060" x 3.622" (376ci), LS3 block, LS3 heads, Stainless intake valves, Comp 921 springs, LS7 lifters, Synergy custom cam, L76 manifold, customized LS2 fuel rail, 75lb injectors.
Last edited by blu00rdstr; May 17, 2008 at 04:05 PM.
KCS - I had e-mailed Fraiser at Speed, Inc. a while back and he had mentioned that there was some sort of problem that shows up on a lot of the LS3s where the LS2 seemed to be consistently better. I don't recall the specifics or if he even went into it but basically said the same thing as you. I was suprised to hear this since I would think they would have to meet the same quality standards. If anything I would have thought the LS3 would be better.
I just wondered if these improvements would correct that problem. It would be better to have a slightly bigger bore and CIs.
I just wondered if these improvements would correct that problem. It would be better to have a slightly bigger bore and CIs.
From what I've seen, the aluminum 6.2L blocks suffer from a sort of "core shift". Like the aluminum is cast around the sleeves, and then bored offset leaving one side of the sleeves thinner (as in .070" thick) and the other thicker. Our shop rejects blocks all the time for such problems.
The LS2 blocks seem spot on 99% of the time. I personally feel the LS2 is the better of the two.
The LS2 blocks seem spot on 99% of the time. I personally feel the LS2 is the better of the two.
KCS - I had e-mailed Fraiser at Speed, Inc. a while back and he had mentioned that there was some sort of problem that shows up on a lot of the LS3s where the LS2 seemed to be consistently better. I don't recall the specifics or if he even went into it but basically said the same thing as you. I was suprised to hear this since I would think they would have to meet the same quality standards. If anything I would have thought the LS3 would be better.
I just wondered if these improvements would correct that problem. It would be better to have a slightly bigger bore and CIs.
I just wondered if these improvements would correct that problem. It would be better to have a slightly bigger bore and CIs.
I'm near done with a forged LS3 for boost setup. The shortblock and parts came from Bruce @ PowrMax, great price, professional work.
Diamond L92 pistons, Compstar crank and rods, 4.060" x 3.622" (376ci), LS3 block, LS3 heads, Stainless intake valves, Comp 921 springs, LS7 lifters, Synergy custom cam, L76 manifold, customized LS2 fuel rail, 75lb injectors.
Diamond L92 pistons, Compstar crank and rods, 4.060" x 3.622" (376ci), LS3 block, LS3 heads, Stainless intake valves, Comp 921 springs, LS7 lifters, Synergy custom cam, L76 manifold, customized LS2 fuel rail, 75lb injectors.
TECH Enthusiast
Joined: Dec 2001
Posts: 548
Likes: 0
From: Dublin, CA
