Quote:
Originally Posted by Ferruccio
Since no two N54's have exactly the same horsepower stock, how does, say, a higher stock horsepower N54 get affected with the same type of tune? (Piggyback, ECU flash, etc) Does the tune become more powerful by a similar "multiplier"?
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Most tune only cars see a bump of about -50whp. If your car made 250whp stock, you
should expect about 300whp on the same dyno. If it is a factory freak 300whp car then you
should see about 350whp on the same dyno.
But as sear has said, there's are too many variables to say anything with a huge degree of certainty as pertains to HP gains and estimates.