question about valve springs
question about valve springs i've heard alot of talk about stock valve springs hanging open under boost i was just wondering what springs ppl were running and at what boost levels. i have a 2000 t/a and am trying to work out the final bugs of an sts install i am currently only running 5psi and was also wondering how high people were running on stock internals
is 10-12psi out of the question with only upgraded valve springs?
is 10-12psi out of the question with only upgraded valve springs?
my engine is not stock anymore......but when it was I had comp 918 springs with comp pushrods...http://www.exoticperformanceplus.com....html?item=522
also ran 10psi with a tr224 cam (stock shortblock)
also ran 10psi with a tr224 cam (stock shortblock)
I think anytime you push the boost past 5 - 6 PSI you'd want to run some dual valve springs and hardened pushrods. With higher boost levels you'll start to experience valve float.
I am at 7psi. Stock engine. Upgraded to TSP hardened pushrods and LS6 valvesprings (higher seat pressure than the stock LS1 springs and very affordable since I was on a budget). If I were to boost higher a stronger spring would be needed though (and and engine rebuild 
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just do the math. intake valve area minus the stem area times the boost pressure. i would shim the springs to offset the extra pressure, making sure the coils still have adequate clearance.
