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LS2 block capabilities

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Old Apr 25, 2012 | 04:50 PM
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Default LS2 block capabilities
Long story short, I picked up what was supposed to be an LY6 this past weekend. Next morning there is an aluminum engine in the back of my truck... It was an L76 after all, which has the LS2 block. I'm about 20% willing to sell and profit getting an iron block, and 80% of me wants to run the aluminum one. I'm not looking to drop 4k into the rotating assembly just yet, but seeing as my 4.8 takes 20+ pounds of boost regularly, I'm confident it'll last a while.

Question now is flex from the block itself...has anyone pushed it hard enough to figure out where the LS2 actually twists and distorts bores? I don't think my turbo will even make 20psi on a 6.0, maybe 17-18 before it chokes up. Looking for some insight with those from experience pushing these blocks to their limits.
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Old Apr 25, 2012 | 11:19 PM
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Nobody goes fast with an LS2 hm..
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Old Apr 25, 2012 | 11:45 PM
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Curious....at 20psi. What RWHP do you make with the 4.8?

What tranny?

.
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Old Apr 25, 2012 | 11:47 PM
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Originally Posted by LS6427
Curious....at 20psi. What RWHP do you make with the 4.8?

What tranny?

.
Dyno day this weekend, should find out then Guess is around 700-720 at the wheels. Weather permitting, that is... Trans is a 4L80e.
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Old Apr 25, 2012 | 11:56 PM
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700 is cake for a ls2 block.
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Old Apr 26, 2012 | 12:04 AM
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Would it take 950 to the wheels? That's about what I am shooting for when all is said and done.
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Old Apr 26, 2012 | 12:11 AM
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.Yes.
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Old Apr 26, 2012 | 12:38 AM
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Well thats good news. Have you seen it on a dyno, or where at?
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Old Apr 26, 2012 | 12:43 AM
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Originally Posted by smokeshow
Well thats good news. Have you seen it on a dyno, or where at?
All over the place. Just search.
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Old Apr 26, 2012 | 11:05 AM
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Originally Posted by smokeshow
Would it take 950 to the wheels? That's about what I am shooting for when all is said and done.
At this power level, studs and doweled main caps are highly recommended along with forged rotating assembly.
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Old Apr 26, 2012 | 11:17 AM
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Originally Posted by COPO9560
At this power level, studs and doweled main caps are highly recommended along with forged rotating assembly.
Just concerned about the block
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