Which one is better and will a 1pc hold up to the 450ish Hp/Tq I am making. I also run slicks at the track so not looking to wipe everything out. It will have a drive shaft loop. The one i am looking at is a 1 pc 4in aluminum.

 

Seriously?

2 piece is clearly stronger. 2 short pieces will maintain integrity vs a long 1 piece.
You're a Crew Cab. why would you even consider a 1 piece?
People break a 1 piece with regular cabs. You'll damn sure snap one with a crew.

 

yeah seriously!
That's why i asked, and my ride is a ecsb. Seems like the carrier bearing would be the weak link.

 

i haven't heard of anyone breaking a 2 piece driveshaft, so i think you'll be ok. the 1 piece break all the time though

 

Looks like CC i your sig.

As stated, i've NEVER seen a 2 piece break. I've had mine up to 134mph at 6448 rpm on 275/45/20"s and have had NO problems with the carrier.

 

I agree, I have had mine up to 156 on the dyno and no problem here either. I'm just asking a question and checking to see if my idea that a single piece would be stronger. But i see that you and other think that the 2 piece is the way to go. I was just looking for input.

 

Try a search in the drive train section for Aluminum. See if you can find some threads on aluminum driveshafts.
However I don't think many people can properly build an aluminum driveshaft long enough for an ECSB and if they do I doubt it will hold much power.

 

dont go alluminum done tried it lol like mentioned on other site, it flex's at WOT, mine flexed to much and twisted and snapped

2pc is the way to go or stay in you case

 

Coolio Thanks Bro

 

2 shorter drivelines set at correct u-joint angles are much more stable at high speeds under load than one long driveline.