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Old 07-06-2017, 05:32 PM   #15
malibu795
 
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Name: malibu795
Title: 2wd numb nut
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Join Date: Mar 2007
Location: s. charelston ohio
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Posts: 6,730
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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adam
99 3500HD LBZ/4l85 C&C semi retired hotshot
07 3500hd LMM RCLB hotshot, GT4088R, ovals
99 FL60 mutt
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