did some more calculations from a few formulas in on of my turbo books. and based off 130' inlet temps, 6500 rpm, I found that our engine at 145whp(approx 170bhp) at 6psi(like a few of the kits) have roughly 112% VE based off the equations in the book. based off that it should take about 13.2psi (assuming an absolute ambient pressure of 14.7 so factor in for that) to make 200whp(or ~234bhp) at 112%ve or if you even figure 100%ve at 6800rpms will take approx 15psi.
also have calculated pressure ratio's for pressure drop accross the Intercooler and factoring in pressure drop through the air filter.(assuming 14.7psi ambient pressure once again) factors used: air filter ~1psi drop and IC ~1.5psi drop.
6 psi 1.62
PR
8 psi 1.76
PR
10 psi 1.91
PR
12 psi 2.05
PR
15 psi 2.28
PR
now the interesting part lets throw some elevation into the mix. just for memory's sake 6400ft elevation was roughly 11.5psi ambient on a cool day so we'll use that for reference. same factors for air filter/ic drop.
6 psi 1.81
PR
10 psi 2.19
PR
15 psi 2.67
PR
just some more variables for those who are thinking about boosting at elevation. it can change you mind on turbo choices in a hurry. also temprature has a big factor in this as well. colder air has a higher density which ultimatly effects DA(density altitude or in simpler terms barometric pressure)
oh for mapping purposes 145whp at 112% VE equated to 18.4lb/min and 200whp equated to 25.92lb/min for those whould like to know.
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