Ported/Aftermarket TB discussion

[Goat Blower]

A 75mm is way overkill, I learned that the hard way on my GSX, I never could get it to idle right even after converting it to use DSM shaft seals. Seeing that others were in the 9's on stock TB's, I would never go back to some crazy one like that unless I was building a 1000whp track car. I wouldn't go any bigger than a bored out stocker on a street car.