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Old 05-16-2011, 07:35 PM   #1
kendall
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Default drilling holes in the flywheel

i might have to drill some new mounting holes in my flywheel to except a new bolt hole pattern for a 10" long pressure plate. i have heard of guys doing this, wount this throw off the balance on the flywheel?....

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Old 05-16-2011, 07:53 PM   #2
David J
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Default Re: drilling holes in the flywheel

If you get it centered exactly and drill and tap all the holes exactly the same you shouldn't mess up the balance . A drill press with a stop would be a good idea for getting the holes all the same . David J
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Old 05-16-2011, 07:58 PM   #3
denverslim
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Default Re: drilling holes in the flywheel

Maybe drill out a few extra to lighten it up. Old skool...slim
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Old 05-16-2011, 08:01 PM   #4
richard crow
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Default Re: drilling holes in the flywheel

when you drill & tap it you have to have a counter sink for the special shoulder bolts get the proper bolts & mike & measure them so you do the job right
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Old 05-16-2011, 08:07 PM   #5
xix32
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Default Re: drilling holes in the flywheel

this is how I did it, jig drilled a transfer drill fixture. I don't see how balance can be effected when the new pattern is equally spaced from the old one.





Last edited by xix32; 04-21-2014 at 10:40 AM.
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Old 05-16-2011, 08:20 PM   #6
Russ/40
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Default Re: drilling holes in the flywheel

The change of pressure plate will put it out of balance. You need to rebalance with a new PP.
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Old 05-16-2011, 08:44 PM   #7
52merc
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Default Re: drilling holes in the flywheel

thats clever wouldnt have thought of doing it that way simple
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Old 05-16-2011, 08:47 PM   #8
Charlie ny
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Default Re: drilling holes in the flywheel

Kendall,
Gotta be CONCENTRIC. My comfort level is using a milling
machine and a center spindle. If you are located near western New
York I'll do it for free.
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