I've done some searching around this forum and I still haven't gotten a sure answer for this question yet.

1. How much rwhp can a Lt1-6spd car make before you worry about breaking the 1le aluminum driveshaft at the track? I believe mine is a 2.5".

 

It's all about how hard you launch. I'd generally say drag radials or slicks and that thing is gone. Although I've seen them go into the 9's.

-Dustin-