all this from a +5 mm increase in the TB? SIGN ME UP! Haha, well, if I plan to bore mine out, I'm going to have to machine my own throttle plate, but that shouldn't be a problem- just get the diameter of the new intake size and lathe down a piece of aluminum, drill two holes (mabye even put the holes in the right places?). Now this introduces the question....will I have a lip from the opening on the intake manifold and have to grind (plastic, I know) that out, or will it accept a bigger bore TB?

Thanks for the advice also, Regal. Since I have Vanos, don't you think that my motor would make better use of more airflow in the mid to upper range?

At the very least, even if I can't bore the thing, I plan on knifing the edge of the throttle plate and grinding down those small set screws that hold it in place and running it through the flowbench to see if it helpes.

Dan in Gainesville