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·Exactly what fuel system upgrades did you have to do to accomodate the higher PSi??
TexasMX6GT said:Umm, actually, 18 psi is kind of ridiculous. From everything I've heard/read about the stock turbo, after 14, the increased heat of the charge air overcomes the extra power you'd make. 15 psi is where is loses efficiency. I dunno how different it would be for higher elevations, but, for normal elevations, 14 psi is about as high as you would wanna go on the stock turbo.