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I bought a MW aluminium driveshaft used, sent it to a race shop to be shortened and after doing a test weld, they said the weld wouldn't take, possibly because it had been heat treated.
Mick




i just bought a new Mark Williams 3.5 aluminum driveshaft this week, all new 1350 u joints and they told me should see around .0400 from a mild steel shaft.
its 11 lbs lighter than a steel shaft, meaning a lighter rotating mass means faster times.
Russ at mark williams said my 52" aluminum driveshaft will hold up to 7700 rpms at 850 hp no problem. my tranny yoke and pinion end is chemically bonded and not welded and tested.



Do an accurate back to back to back to back test and post the results........

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true but when your class racing like Myron is evey .01 helps. bracket racing it will make no difference..





As you know, in class racing he's got to weigh a certain weight.........If he's already at weight, and installs an 11LB lighter driveshaft, he'll have to add 11LBS to his car..........and I guarantee he won't even see .01 gain by going to that, no matter what Professor SuperStockRacer says....."its 11 lbs lighter than a steel shaft, meaning a lighter rotating mass means faster times.".............

Now, like I'd mentioned earlier, if you're overweight, and need to lose the 11LBS, then it's something to think about.........