max hp

[LSblaze]

What's the "safest" max hp on boost can an ls block hold before you must sleeve..Just curious....:thinking:

[SiRed94]

What's the "safest" max hp can an ls block hold before you must sleeve..Just curious....:thinking:


There is no exact number but with that R/S ratio and piston size, I wouldn't push past 350. You always hear 450 etc. but they are treading on very thin ice.

[SiRed94]

But other things factor in, like if stroke has been changed, tuning, piston weights, if the block is posted and or block guarded.

[LSblaze]

nothing done to internals....just bone stock

[SiRed94]

nothing done to internals....just bone stock

Well, in that case, the sleeves are the least of your worries. Piston ring lands, or rod bolts will fail way before the sleeves.

[SiRed94]

And if by some miracle the rod bolts don't stretch, the rods will bend/break shortly after.

[LSblaze]

Thanks for the info...I was just curiuos to know how far I can turn up the boost before I decide to do the internals.

[LSblaze]

Thanks for the info...I was just curiuos to know how far I can turn the boost up before I decide to build the motor.

[scttydb411]

stock internals i say 100whp over stock and it stays a reliable daily driver. the further you go the less reliable it becomes. i've tuned some to 150whp over stock w/o probs, but you're rolling the dice. with rods, pistons, headstuds-the sleeves are good for 400-500whp on a good tune...i usually say 400whp to give yourself a good margin of error. i've tuned a few on stock sleeves past 500whp that held fine, but i wouldn't expect much if you go that far.