Originally posted by Geo:
Ok, then this could actually explain it. Understated stock hp (makes one question if the E36 325i should even be in IT then) and sloppiness from the factory. Find the best parts, blueprint the cams (grind new from billet), figure out optimal cam timing, improve the breathing. That could all add up.
The cams don't need to be ground - the tolerances are tight. The biggest one-time change was the exhaust. When I built my first ITS car, I put on a set of aftermarket headers that were about the only ones available for a gain of a few HP. Now, as a spin-off of World Challenge development and having a fellow BMW racer with contacts, we have a computer generated exhaust that shows amazing gains.

I have quit arguing about Comp adjustments - not worth it. But, seemingly small attention to detail items like this can be worth more than you would think. Shouldn't be too difficult to build something similar for an RX-7, 240, Pcar, or anything else if someone is willing to do it.


------------------
-----------------------------------------------------------
James Clay
http://www.bimmerworld.com
Engineered BMW Performance
World Challenge/SCCA/BMWCCA Racecar Rental
Genuine OEM and Used BMW Parts
(540) 639-9648
-----------------------------------------------------------