Re: Question on e36 big bore throttle body

[Matt6481@xxxxxxx]

David,
DON'T DO IT!!! Maybe on a racecar where top end is the most important, but 
the truth on all M50/TU engines is that the throttle body is NOT the 
performance bottle neck. A throttle body bored even just a few mm will give a 
few hp (less than 3 at peak, which probably won't coincide with your stock 
power peak) and take back just as many hp at certain rpm points because it 
will actually create a vacuum!! I think that at this address:

http://www.lycaeum.com/m50tu/index.html

you'll find dyno sheets for an M50TU with the Throttle body and you can see 
the up AND DOWN fluctuations. Not quite the same as our M50 engines, but 
close enough!

Matt Malfa
92 325is

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