110" case bore

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Apr 26, 2014 | 08:39 PM

07fsxt

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From: Kansas

110" case bore

Do I need to case bore a 110 to get 120 internals to fit?

Apr 26, 2014 | 09:16 PM

qtrracer

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From: SoCal

Quote:

Originally Posted by 07fsxt

Do I need to case bore a 110 to get 120 internals to fit?

I believe the 4.060" cylinders have a bigger spigot than the 4" cylinders. Plus the crank needs to be changed to a 4 5/8" stroke version.

Apr 27, 2014 | 10:51 AM

07fsxt

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From: Kansas

Thanks

Apr 27, 2014 | 03:45 PM

wurk_truk

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From: Ashland Ohio

Case boring will not work out very well on 110s. 110s use an o-ring for base cylinder seal. That o-ring is already next to the studs. Bigger bore takes a base GASKET, and with a 110, all of the available real estate is gone, because that block was originally o-ringed. It can be done, and is done regularly, but oil leaks, etc are a common occurrence. Hell, even older 110s had oil seal issues. I do NOT recommend going bigger with a 110.

Apr 27, 2014 | 07:56 PM

07fsxt

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From: Kansas

Thanks, just the kind of info I was looking for.

Apr 28, 2014 | 05:57 AM

Hillsidecycle.com

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We have converted probably 2 dozen 110" engines to accept the spigot bore ID of 4.322" for S&S 4 1/8" cylinders, building 124"ers.
No issues with those.
Scott