Quote:
Originally Posted by retyler
So at what H.P. and at what RPM should one begin to be concerned. I don't recall any Detroit Iron equipped with a factory installed shield. Maybe I'm wrong.
I have seen a lot of factory cars spin over 6K.
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dont think hp has much to do with it. if you were to pop a u-joint during a powershift, the free revving could easily blow it apart- providing youve got enough valvespring pressure and no rev limiter...
a smaller, yet still very damaging thing can happen in about any car that could be downshifted at high speeds...if someone would try to force it into first at 70mph, the cluch disk will explode- and although unlikely, the exploding disk might possibly fracture the flexplate then flywheel(but they would 'only' be at engine rpm) and still tear up anything in the plane of rotation. Centrifugal force(or centripetal for the sticklers out there) can really tear up a lot of stuff. we built some 3000 rpm wheel lathes at work(twin spindles) and a backshift supervisor removed ONE chuck jaw to repair a locator- told the operator just to run the one side- well the empty spindle literally MELTED a 9.5" tapered roller bearing before it even got up to speed, darn near walked the 40,000 pound machine off its foundation. IIRC, the jaws were 9.5# but at that speed/radius were 25,000 pounds per jaw centrifugal...(BTW- the machines has 1/2" solid steel guarding). centrifugal force aint nothing to play with. I think the formula for pounds of centrifugal force is .000341w*r*n^2(weight in pounds,radius in feet,n^2=rpm squared)...plug in some numbers and they get scary real fast.
