Indexing a crankshaft
 

Can anyone out there tell me how much HP would be gained by indexing an after market crankshaft from a reputable company?


I understand that indexing a crankshaft is to assure that each and every journal on a V8 engine is exactly 90 degrees apart.


Would this not be tantamount to attempting to build a Formula 1 engine to run Stock Eliminator?


Sarge

Re: Indexing a crankshaft
 

If I needed to get a crank done from scratch, I would probably have it stroked and indexed. Otherwise, I wouldn't bother. Not for a (relatively) low HP and low RPM engine.

Re: Indexing a crankshaft
 

Take what your engine makes in hp and divide it by cubic inches, now figure out the displacement increase and plug the hp per cube into the new formula. That should give you a start. It may increase more due to the compression increase also. Thats what was explained to me many years ago by an old time.class racer.