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.

[scheides]

Originally Posted by 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.

On a DSM or evo 8/9 that use a BISS and ISC, I totally agree. On an evoX, the only form of idle control is the actuation of the butterfly, so these bigger TB's are actually very very driveable. Lomker has had one on his car for over a year now? It idles like a dream.