LS2 bottom end for boost?
Le Mans Master
Joined: Dec 2005
Posts: 6,999
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From: Southeast TX
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Joined: May 2010
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Ok so i bought the crank.
Does that change things as far as compression ratio goes? Do you still feel ok running 10:1 on pump gas, 10 psi, with 402ci?
I live at about 1100ft above sea level, and the local track is at 5100ft (West coast canada, mountains)
With a 10:1 compression ratio and all things factord, I calculate a dynamic compression of about 12.5:1 under boost and a cylinder pressure of 145 psi using a ABDC of 70 degrees. Both of which drop at altitude. Do those feel like safe numbers?
Anyone have any more insight with cylinder pressure? What do you feel is safe?
Does that change things as far as compression ratio goes? Do you still feel ok running 10:1 on pump gas, 10 psi, with 402ci?
I live at about 1100ft above sea level, and the local track is at 5100ft (West coast canada, mountains)
With a 10:1 compression ratio and all things factord, I calculate a dynamic compression of about 12.5:1 under boost and a cylinder pressure of 145 psi using a ABDC of 70 degrees. Both of which drop at altitude. Do those feel like safe numbers?
Anyone have any more insight with cylinder pressure? What do you feel is safe?
