Originally Posted by
pajeff02
Hand filed the bumpstop down on the throttle body. I didn't feel comfortable going at it with a die grinder as there isn't a whole lot of room to work. Placing it flat on my workbench, with the PCV source line hanging over the edge, allowed for good control and a firm hold. I measured the thickness of the bumpstop before I started and it was right around 0.325" (measurements in the pics are off just a touch -- I only have two hands!):
I worked it down a little at a time and kept checking the angle of the throttle blade relative to the housing. It isn't exactly 90 degrees now, but sure is a whole lot closer. Chris warned me that he had issues after shaving down his bumpstop and I felt it best to keep it on the safe side to see what happens. Final thickness of the bumpstop was 0.262", so I removed a total of 0.063" of material.