Quote:
Originally Posted by cofo11
10psi is 10psi as the measurement is not taken at the turbo but out of the downstream system, (ie intake pipes and manifold). Now a larger turbo will make a higher boost number and will be running at a much lower percentage of capacity than a smaller turbo at a given boost number. That's where the benefits are derived.
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You have to take flow into consideration. 10psi out of a large turbo is a lot more cfm than the same psi out of a small turbo.