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      03-03-2012, 04:45 PM   #67
Papethova
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Drives: '08 135/ '11 1M
Join Date: Oct 2007
Location: at Death Valley 127

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Quote:
Originally Posted by Zuzu View Post
Actually it's 4Kw, which is about 5 bhp - which is nearly 25% of your claimed figures, so not insignificant.

Where did you get the 4Kw error in calcs from ?
OEM mid pip = 246

N55 pipe = 258.1

the difference is 12.1

I dont think you can use the 242 figure since that was with M off, right?
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