Quote:
Originally Posted by musclecarjohn
Spun mine in the '69 to the 6800 chip on the dyno several times and made 431rwhp with a stock GM driveshaft,never worried about it before,maybe I should?  |
John - Like I've said many times about myself --- Better lucky than smart!
The critical speed of a shaft is really important - and I don't think I ever encountered such things "back in the day" -- but now we're spinning motors to higher revs and with big gears (thanks to overdrive) and maybe we'll see more failures like this.
Luckily I think most of the folks on here that have done big engine swaps - are familiar with this issue - and most likely have already upgraded their driveline - if for no other reason than because they had to make a new one for the new rear and trans... (maybe Lucky AND smart!).
I was thinking back to my drag race days - and can't ever remember a discussion about this - but I was young - and maybe it was already taken care of (Obviously) by the constructors. Back then - all I can ever remember worrying about was the U joints... but they never broke either! LOL