See my sig for engine specs. I haven't had the car to the dyno yet, but the 400 is thumping out some serious power. I just shelled my u-joints tonight. I don't know anything about driveshafts. As far as will they hold up to my engine, will a stock aluminum one from an LS1 car be strong enough, or do I need one with aftermarket U-joints? I don't competetively race the car, it is just a street car, but when I drive it, I do like to cut loose with it from time to time. Will somebody please make a recommendation for me. I know I could probably buy the really expensive one from Spohn, but what will be the best bang for my buck?

Thanks,
Eric

 

A stock driveshaft is probably fine.

Those Flowtechs are probably killing enough power to keep you from hurting anything anyway.

 

I know those Flowtechs suck, but I was so "smart" and put in a 7-quart oil pan per the recommendation of my buddy, so I totally screwed myself for running any kind of large diameter y-pipe. I've got Alston SFC's and a Spohn crossmember, so I can't run longtubes, and the kick outs on the oil pan are so big, the only way the exhaust shop could build a y-pipe that didn't hang way down under the car was to run a 2.25" pipe from the driver side and a 2.5" pipe from the passenger side, y-ing into my 3" cat back. Even if I ran the 1.75" SLP shorties, the y-pipe would still kill me. The car is fast, but trust me, everytime I see that oil pan, I want to shoot myself, and right now, I'm too lazy to go to all of the work of changing it. Sorry that was off-topic; just had to vent about my frustrating exhaust.

 

Bump

 

Thanks guys. I put new u-joints in it for now, and we'll see how that goes.

 

If you get one custom made, get it made from 3" x .083" steel tube. 1330 spicer u-joint yokes should be more than enough but if you upgrade everything to use the 1350 u-joints, you'll never break anything. A u-joint upgrade means you need to get the driveshaft made with 1350 full round ends. The transmission and differential should also get 1350 yokes however conversion u-joints can be used until everything is upgraded.

 

Thanks, I think I've got it under control for now.

 

the ls1 driveshaft made my drivetrain as smooth as a lexus

OH YEAH ITS ALL BRAND NEW
SO EVERYBODY CATCH THE BOGALO FLU-BEASTIES