09-20-2012, 06:57 AM
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Originally Posted by Wheeliest
 just so you know, most SS race built motors for club racing they use the thinnest factory bearings available for rods and crank. so its not necessity to match the codes.
for a perfect build, you would use a brand new crank, along with brand new cases and start completely fresh. |
There are numbers on the crank, engine cases and rod ends...Those are used to find the correct bearing size..And usually is more then one different size in one engine...
The chances of getting a used crank that shares the same numbers as your engine is like a million to one...If its too tight they will fail right away, if its too loose they will fail very soon also...
Running loose tolerance for a race engine is for power, but not for reliability...And theres a huge difference between running loose tolerance that has been measured and calculated and just using a different crank without the proper bearings or even checking the clearance