Twisting drive shafts in two?
Ok, had this happen twice now, in two weeks...I need answers! *sorry, long post*
Blew up my 355, put in a 14:1 383, with a 500 cfm carb. Had a 6.33 gear, car weighed 3504 pound. First night out ran great, stupid amounts of power.
Second night out, put about 53% wedge into the car, and 140-150 lbs of LR bite...she had some NASTY traction. I could just bury the throttle about halfway through, was carrying the LF half the time. Last lap of the heat...rear end BLEW...UP right at 6900 rpm. Broke the driveshaft. I pulled handfulls of pieces out of the housing...it was dead.
I ordered a new driveshaft from southwest speed, borrowed a set of 6.20 gears, checked for binding, clearance...everything I could think of....and went racing the next saturday.
Made it through the heat race, but had a slight vibration start on the last lap at about 6600. All bolts were tight so we went back out. Hooked HARD the first lap of the feature, then at the end of the front stretch at lap 2 it chucked the driveshaft at about 6400.
Now, my confusion. It looks like the driveshaft was held on one end, then twisted and pulled down until it was two pieces.
A few old racers said its not possible...at all! But is it possible with this big engine, a really good hooking set up and a car that weights 3504 pounds to twist a driveshaft in two?
please give me some input!