LS2 valve springs under boost?
09-15-2005, 09:52 PM
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LS2 valve springs under boost? I will post this elsewhere, but I am curious about the FI crowd. I am ready to tune my LS2 GTO w/ STS. No internal engine mods, but I am seriously considering dropping in a set of 918's and hardened pushrods tomorrow [dyno tune Monday]. BUT: are these the LS1 springs, or are they LS6 springs? If they are LS6, are they up to 10+ psi boost?
09-15-2005, 10:36 PM
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With no engine mods at 10psi and 11.0cr I dont think you`ll have to worry about the springs, cause that engine wont last very long. I would suggest spending the $$ on some AFR 225s 72cc chamber which will get your compression under 10.0 and make more power as well as making the combo much safer. 
09-16-2005, 07:15 AM
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Trust me, we will be monitoring carefully...and spraying the methanol during the tune.
Realistically, we are looking for 500 rwhp, perhaps a bit higher, but not trying to build a race car. My gut feeling is that we won't need 10 psi boost. I am simply trying to sort out the issues of valve float. The LS2 pulls quite well to the redline STOCK...just wondering what some backside pressure on those valves may do.
Realistically, we are looking for 500 rwhp, perhaps a bit higher, but not trying to build a race car. My gut feeling is that we won't need 10 psi boost. I am simply trying to sort out the issues of valve float. The LS2 pulls quite well to the redline STOCK...just wondering what some backside pressure on those valves may do.
