rear upper control arm hole ?

[Busa Vinny]

when i put mine in i used the middle holes,but once i put the behind the seat panel on i wont be able to get them out,if i put them in the upper holes i wont be able to get them into another hole anyway so im having second thoughts on where to put them,
ANYWAY, my question is,what exactly will change using the upper or lower holes,like ride height or handling,i dont plan on doing too much drag racing ,mainly street use with the occasional track day, thanks....vinny

[Richard Oben]

The higher the hole the better the straight line performance. The lower hole will work without too much hp. The wheel hop issue is part of the equation. If you plan on no drag racing go low. Cheers Richard.

[d isham]

I believe one of the influencing factors causing the wheel hop issues is incorrect pinion angle. I guess I would use what ever hole gives you the desired pinion angle. There was a great deal of dicussion on this on the old other forum and I believe a -3 degree was the concensus for being the desired pinion angle.

Doug

[bill32]

I discussed this with the factory. Their recommendation was to use middle hole for all normal driving conditions. Other holes are primarily for Race applications. Upper hole is for better traction for Drag Racing, lower hole is for better handling on road course racing.