Ported/Aftermarket TB discussion

[Murlo26]

I think Scheides was saying that a 75mm TB on the X has better idle control than on an 8/9 or DSM because it uses the butterfly valve. Not that going to a giant TB makes it have a better idle.

[scheides]

Originally Posted by Murlo26

I think Scheides was saying that a 75mm TB on the X has better idle control than on an 8/9 or DSM because it uses the butterfly valve. Not that going to a giant TB makes it have a better idle.

This. All I was saying was that the idle control on the X is a lot better than the dsm & evo8/9 so running a bigger TB (or bigger cams) is less of a problem for driveability.

At what point the 75mm is actually going to be 'needed' or outperform a 64mm (and with what intake manifold behind it) is what I'd really like to know.