Quote:
Originally Posted by malibu795
PR or pressure ratio..
4:1 PR is 45 psig or 60psia if we round 14.7 to 15psi for easy math and sake of debate..
Round to nearest "10" for debating...
If you're shoving an additional 1500cfm Into an engine that does 350cfm the Engine is moving 1850cfm at PR of ~4.3:1
1500cfm is roughly 91lb/min air flow
S480 will push ~120lbmin or ~2000cfm
I talked about this in my FL60 thread in getting a better turbo to put on my 8.3 12V
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ok, you're taking into account the forced induction. so would we need to change the VE to a hypothetical 2.8(?) instead of the .80?
also, my maths a little different but i'll use the actual numbers and 4:1 PR. for the 6.7 its 1416 CFM to lb/min, 1416 x .076 = 107 lb/min.
so to efficiently fill a 6.7L air pump at 3800 rpm and 60psi, you'd need 107 lb/min of air. (is this a fair mathematically conclusion?)
and for a 6.2L air pump at 3800 rpm and 60psi, you'd need 100 lb/min.
5.9L = 96 lb/min