What bolt hole do you guys set the first heim joint of the torque arm in on the drive shaft safety loop brace?(short torque arm) it has 4-5 different holes.. I'm assuming the top one is where i'd want to be? I'll post a picture with what I'm talking about soon if that helps

 

It depends on how hard you want to hit the tires. Mine is in the 2nd from the top. Make sure to reset pinion angle no matter where you change it to.

 

^^^ good info... We send the bolt in the second from the bottom as a starting point and it will get you down the track. Run the car there and see what the launch looks like.

There is no majic one position that is better than all the others, it all depends on your car. Available traction, type of tires, tire pressure, low gear ratio and rearend ratio, launch rpm, shocks settings will all come into play at some point.

 

what is the ideal pinion angle for a "race car" on drag radials?

 

It all comes down to the angles your car is setup at. Pretty much the instant center point -where the LCA and torque arm angles hit. I ussually set mine out infront of the car and see how it hits the tires.