CLASS RACER FORUM - View Single Post - Dumb question... +/- .015 on crankshaft

Larry Hill · 02-10-2021, 08:18 PM

Adjusting stroke will not correct index. To fix index try to find a grinder, machine, with new or rebuilt chucks that has index stops at 90*. After its index always check TDC and zero on damper. Rolling the crank to get it to "clean up" @ .020" under while stroking it .014" will some time change the relationship between the two. To check quick index #1 and #6 should arrive at TDC at the same time using two dial indicators.

We use to grind cranks for Kuntz & Craft years ago. In fact we have lost to a 428 heads up with a crank we stoked and indexed for Jim and Keith.

02-10-2021, 08:18 PM	#9
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,662 Likes: 1,953 Liked 10,820 Times in 2,249 Posts	Re: Dumb question... +/- .015 on crankshaft Adjusting stroke will not correct index. To fix index try to find a grinder, machine, with new or rebuilt chucks that has index stops at 90. After its index always check TDC and zero on damper. Rolling the crank to get it to "clean up" @ .020" under while stroking it .014" will some time change the relationship between the two. To check quick index #1 and #6 should arrive at TDC at the same time using two dial indicators. We use to grind cranks for Kuntz & Craft years ago. In fact we have lost to a 428 heads up with a crank we stoked and indexed for Jim and Keith. __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817*