Quote:
Originally Posted by kook
Will have a cam and currently has 1 7/8 lts. I want to keep the boost to a minimum. Like 8-9 at most. L99-Ls3 conversion if that matters.
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I'm running a front drive Maggie TVS with mild blower cam, Ported 243 heads (similar flow as stock LS3 heads), LT headers, 3" duals, no cats, and 3.1" pulley. I'm seeing 12psi. Based on that, I'd bet your LS3/L99 would see well over 8 to 9psi with the 3" pulley. If you're looking for 8 to 9psi, you might want to go a step bigger than the 3.0".