I don't think there is anything physically wrong with the throttle body or the TPS. The only suggestion I could have is to re-do the setting up process step-by-step, giving extreme attention to every detail.
Whenever we've had an issue like this, where a car requires a higher TPS setting in...
Are you able to post some photos of the throttle body? I’d like to see the shaft with the TPS off, the throttle body fully closed with the idle screw out, and what the throttle body looks like when the throttle pedal is all the way full.
This arm is one of the older style arms with the larger triangle support weld in the middle. We have seen some fitment issues with other teams as well. If you can get a measurement from heim to heim, the "C" measurement in the baseline PDF, that will help determine the appropriate lengths.
Hi Lance, just confirming - are you measuring from the center-to-center of the spherical joints?
The attached measurements are what you should be showing.