the driveline angle is fine.. the drop springs i installed in the rear had the wedges for correct angle, i am definately going to double check it but the truck makes 500 to the tire so the stock exhaust tubing drive shaft just could not hold it..... i have made tons of passes with it though but this is the first pass with new set up..

 

Did you break it launching the truck Charlie, or running down the track.

 

damn son 500 RWHP outta a little 4.8 thats impressive whats done to it you running the jug? or is it NA?

 

i think i bent it coming out of the hole cause i felt a vibration then at about 100mph it came out

 

It may have been out of balance and let loose at higher rpms. My stock one has held up fine with 1.5x-1.6x 60' times. I had mine high speed balanced. The 1st time they spun it up, it was quivering pretty good. The guy at the shop said it was within factory specs. After balancing it, he spun it up again and it was perfectly straight.

 

we had one come apart on the dyno on a bone stock truck... aparently our speed limiter has something to do with our driveshaft lol.. i have a guy that is going to shorten a suburban drive shaft for me, the big *** alluminium one

 

sounds like a bad u-joint. Those shafts can handle 500HP without a problem.

 

no it was not u-joints.. they are still in tact LOL... plus they are brand new. Also it twisted it right in the middle and it looks like exhaust tubing, 500 to the wheels with slicks and 4xxx pounds could easily make ground beef out of it, and it did!!!! i also have a 4k+ stall with 2.6 str lol..

 

Crazy, you must have gotten a bad driveshaft based on the data in the link below. http://www.dana.com/Automotive_Syste...propshaft.aspx. Seems like it would be the critical speed (for the long shafts) and the u joints that are probably the weak spots for a good shaft (and the balance too)

Just as a reference, 2200N-m = 1622 ft-lbs, 2500 = 1843

 

i thought our factory shafts were american axle? not spicer... i just installed new joints in it before it broke but they were tested for speed the night before i did about 120... you guys have to keep in mind that if you have low gears its spinning even faster to achieve such speed, like i said i think i twisted it or kinked it coming out of the hole and then it got to wobbling and came apart as i gained speed/rotating mass