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LS3 and boost...

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Old Jun 6, 2009 | 08:33 PM
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Default LS3 and boost...

What all would be required in making a setup on the LS3 to withstand 15-20#'s of boost on a consistant basis? Also the same goes for the L99?

I am not fully knowledgeable on the LS3 or the L99. I would assume different rods and possibly pistons would be a must, but past that I really don't have any idea.

Specifically thinking years down the road when the new Camaro has been out for a while and there are turbo kits available what all would be needed.
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Old Jun 6, 2009 | 08:46 PM
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From the mods in your sig - it seems you are already making good power. Are you thinking of swapping to an LS3?
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Old Jun 7, 2009 | 09:18 AM
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No, it is for the new Camaro, and thinking of getting one if the aftermarket is open to my needs.

Hence when I said; "Specifically thinking years down the road when the new Camaro has been out for a while and there are turbo kits available what all would be needed."
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Old Jun 10, 2009 | 10:15 AM
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what size turbo are tou talking about... for example a t3 w/ 15lbs isnt as much air being pushed through as larger turbo @10lbs (which is more effeciant)

but for what you are asking i would say you will definatly want to add thick metal head gaskets to drop compression some and replace head bolts w/ arp studs. upgrade fuel delivery and add larger injectors. what numbers are you trying to get to as far as hp/tq?
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Old Jun 10, 2009 | 04:47 PM
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Billet main caps and pistons would also be a requirement. Thick headgaskets are not going to change your CR to the point at which you would be safely away from detonation while running 20#'s of boost. A small turbo would unlikely be able to support this. Think more around the lines of a 76mm sized turbo or blower equivilant of the Procharger F1A.

A decent setup with supporting heads and cam with that boost amount should net 750+ to the wheels easily.
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Old Jun 10, 2009 | 06:51 PM
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There is absolutely no reason to run that much boost on a large displacement motor. Simply running the right camshaft to increase the dynamic compression ratio at a reasonable boost level [12psi] will allow you to achieve more power than the stock bottom end will put up with. 20psi is for motors which have no displacement, which is hardly a shortcoming of the LS3.
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