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Message: <blockquote data-quote="94turbostang" data-source="post: 655757" data-attributes="member: 11143">this equation is useless for turbo setups. reason being is turbo size/efficiancy.running 20 lbs on a small knock off turbo will produce low numbers realistically. running 20 lbs on a bigger turbo/more efficient will produce much bigger numbers. like comparing a garrett 44 trim to a hks t-88 turbo with both making the same boost.think of it this way, stick a small straw into a balloon, and blow the balloon up. now take a large straw or whatever and try blowing it up. youll notice how much faster the balloon fills with air using the larger diameter straw. straw=turbo.this is also without factoring ambient air temp and elevation. im almost at denver elevation. take my car to see level and id see a huge difference in numbers. elevation plays a huge factor with cars under forced induction because your trying to compress air to fill the cylinders with more air than the pistons would naturally suck in. colder air= air molecules are closer together. hot weather= air molecules are spaced further apart.im not trying to knock anyones math or calculations. i hope this doesnt cause any drama. im just trying to expand the knowledge</blockquote>