My friend has a couple of these laying around in his garage. I can't seem to find any info on them. I have heard that if they check out ok they can be reused. Anyone have any insight?

Thanks,

Josh

Got one in my Colt. Had it turned down to Std. 440 journals (rod & main) and all seems to be just fine.

Usually you can't put a damper on them and there is no place to bolt a flex plate

Josh, you are correct. I needed to index and rekey the crank.

Can be problems many do not have any register ring for converter. clearances for rods .003plus mains .005 plus

That was all taken care of with the machine work on my crank, Fred.

Thanks for the replies. It will be free so I am not sure if it would be worth the trouble.

If you don't use it. Let me know, I may be interested.

I ended up with a Bryant 4.5 stroke from some buying & selling years ago.I used it in my blown hemi for 10 years before I hurt it and bought a new rotating assembly.Cut it 10/10 and installed a converter ring.It's back on the shelf with nose damage
It had some minor cracks in it when I first obtained it and was told if I'm under 2500 HP that it would be fine.I never went over 800HP with it

I've bought and used them, the crankshaft flywheel flanges are a little thicker than the stock Mopar street cranks are but it doesn't seem to be a big deal. Kieth Black use to sell the adapter rings to push into the back of the cranks to get a register for the flexplates to center off of, that worked well

In the early days of stroker motors for a bb you had to get the journals spray welded and offset ground to make a crank.

I remember being at the mopar nationals when it was still at Indy. They were bringing in a few pallets of used top fuel cranks. These were high end heavy pieces that had cracks in them that were not seen by eye; and were no longer suitable for top fuel. They were all gone in about an hour for about $150-200 each. The word then was they were plenty strong for whatever you could ever do to them NA or even blown to about 2000 hp. I was told they were very heavy and would take a fair amount of work be useable.

I watched a friend go into the wall at 1000' in his car because the "cracked but good for under 2500hp" crank exploded taking some of the block out thru the wheel well and the right front tire off the rim in the middle of 3rd gear. The engine made under 900hp on dyno runs and aside from the dributor cap and wires there was nothing usable left.

If it's tested and shows cracked there is nothing but opinion about what it can take or when it will let go. IMO I'll never use them.

Does KB still sell those adapter rings ? I just bought a new fuel crank from Bryant have a year left on my flex plate ,. ATI sells flex plates to fit these cranks but would rather buy one when I have to .

I might be knocking on the wall of 2500. I can get everything checked out for free and have a choice of a bryant crank and a couple other brands. I will have to check out that adapter ring.

I used mine for heavy metal donation

This was a friends motor that had one of those "should be good for 2000 horsepower" used fuel cranks. His motor made about 800 horsepower. This put the car into the wall at about 1/2 track. It wasn't pretty!!!

If a Top Fuel team is selling a crank (or anything for that matter), 99.9% of the time it's not worth having.....

Top Fuel cars change the crank every 10 runs. Most all the time the cranks that are pulled out have hairline cracks. Some are in spots that can be welded. Long run probally easier to buy a good aftermarket steel crank.