yOU HAVE more power then a spacecraft, these kinds of questions are so out in the open it to hard to say. weather, barometric pressure,............feel free to bash me but this is one question a guess can't even say.
I need a 75 mm throttle body, and I have a 65 if You wanna trade and maybe some cash. Let me know what you think. Mine is just polished up by me so it looks new.
90 % of the time the same same question is asked. And I may not reply to because it gets old but who likes to come back to the same forum to see the same info not 10 times but 11 whole times.
believe me or not its pretty good you can put it on a stock casting and use a permanet marker to color on the inside of the gasket and then port that baby out!!
but I'd say about 1/8