A guy asks a question about pinion angle to put his car together to go racing. What does he get? A load of Poindexter horse crap that does him zero good, and may confuse what he's doing. The physics of angles are no mystery to anyone with high school geometry, and basic trig. Does any of that crap get the guy to the track? In no way does it do anything of benefit. He has what he has to work with, and that's that. We also know what is effected by changing angles. Does the guy working his butt of to go to the track need any of that?