Thats the 2nd shaft I've ever actualy seen that broke. The other was years ago in Dan Dye's blown alcohol modified street Cuda.
Doug Monte Smith broke one years ago, running a load of nitrous and over 1,000 hp. That kind of a combo would provide the shock and or torque load strong enough to kill stock shafts. So depending on your combo, like mine, under 1,000 hp should live a while. The 655 motor we are going to install is well into 4 figures and peak tq was almost 970lb/ft n/a. We are going to run it n/a and hopefully get it into the 8's. Then the plan to put a dual fogger on it, so a 9" type rear and a TH400 derived 'box are to be installed before we press the button. I'd like to keep it all mopar but I can't see either the 727 or the Dana 60 living with it all
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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