The Ford Barn - Flathead Engine Bore???

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CC33	11-04-2011 08:39 AM

Flathead Engine Bore???

Is 60 over the max bore for a flathead?

Ed Pitts

11-04-2011 08:48 AM

Re: Flathead Engine Bore???

Which block do you have?

flathead4rd

11-04-2011 09:10 AM

Re: Flathead Engine Bore???

On an 8-BA block you can go to 3-3/8" if you have it sonic tested first. Most go to
3-5/16" to be safe. On the 59 blocks I'm not sure of the max bore.

CC33	11-04-2011 09:27 AM

Re: Flathead Engine Bore???

Quote:

Originally Posted by Ed Pitts (Post 300632)

Which block do you have?

It's a '36 LB.

JM 35 Sedan

11-04-2011 09:31 AM

Re: Flathead Engine Bore???

some say to be on the safe side .060" is max for the early 21 stud blocks. I've only ever gone .030" over on mine so I'm not sure. I know some have taken a '37 block to .080 over but that year block may have thicker cylinder walls.

Ed Pitts

11-04-2011 09:39 AM

Re: Flathead Engine Bore???

Here is a previous discussion on the issue that you have. Ed

http://fordbarn.com/forum/showthread...light=max+bore

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