Almost forgot about this thread lol, and yes I thought about that, I think it would be a definate improvement if you were running some good longer duration cams, higher rev limit, and sufficient fuelling, then I think the 55mm TB could become restrictive, especially if you go and compare it to ITB's. Another thing, if you're just tootling along in 5th and floor it, you don't really go anywhere, whereas if you gently ease the pedal in, it picks up alot faster. I think you'd get a much worse version of this if you had the bigger throttle body without the longer duration cam and higher rev limit. notice I use "I think" alot - I have not tried anything myself (yet) - it's mostly guesswork here