This is the Zilla'* TB. Many of you know that I took Damemorder'* lead on cutting out half the MAF support some time ago. I finally took it that little extra step tonight, last minute touches before it goes back on the car.
When the throttle is open, our TB'* have the heads of two screws exposed that hold the Throttle plate. Also, the face of one side of the shaft is milled flat for the screws. So what if the throttle is at WOT? the heads of two screws and the BOTTOM half of the throttle shaft are a restriction. What if you milled the opposite side of the shaft flat as well? What if you countersunk and put in flathead screws? Gain maybe 2% flow? What the hell, nothing to lose, and my own labor is free.
Zilla TB, already ported for the MAF support, before milling the shaft (note the round throttle shaft in this view):
Opposite end of the TB (note the OEM flat for the screws that hold the plate in this view):
Also before milling. Due to focus, you can barely discern the flat side of the shaft and the opposite round side before milling:
Let the milling commence:
Spare STOCK throttle body showing pan-head screws sticking up (these are exposed from the side at WOT):
Same view of the Zilla'* TB after countersinking flathead screws:
View of the new flat on the formerly round half of the shaft:
View into the STOCK TB, showing the round half of the shaft:
Same view of the Zilla'* TB, clearly showing the Porting and Milling:
If you're going to do it, go all the way.