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"more efficient" at higher boost pressure, compared to pump gas (91-94). The efficiency of the turbo goes down b/c as you increase the boost pressure you create more heat (think Ideal Gas Law PV=nRT). V, n, R are constants, so if you increase P, you increase T. Even if you are delivering more air (i.e. higher boost), the air gets hot beyond the point for it to make any more power. You exchange P for T, and don't net any more power. 19 or 20 psi can be fun for short shots like WXY has done on stockers and on race fuel (the race fuel is harder to ignite, therefore reduced the likelyhood for detonation from all the added heat), but not as a DD. Why claim "I have 4xx HP" if you can't drive it that way everyday? Hopefully you understand... SS
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"I haven't been everywhere, but it's on my list."
-Susan Sontag "All the people cry, 'we want more'"
-Big Stuff Fuller "If you have no lag, you have no turbo."
-Corky Bell
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