Quote:
Originally Posted by Peter M
I was unable to identify any improvement with a bored throttle body on my modified 3.2. It felt great but after objective testing I proved once again how unreliable our butt dyno is. I did a post on my findings a few years ago.
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as I understand it, the larger throttle plate in an enlarged throttle body allows more air into the engine at the same part throttle position as a standard-sized throttle body. This provides the "butt dyno" perception of increased (part throttle) performance/different throttle response. However, since the throttle body's diameter is not a significant pinch point in a stock or mildly tweaked 3.2 Carrera engine, full throttle performance (as tested on a dyno) is not materially affected.