Flathead Engine Bore???

[CC33]

Is 60 over the max bore for a flathead?

 

[Ed Pitts]

Which block do you have?

 

[flathead4rd]

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]

Which block do you have?

It's a '36 LB.

 

[JM 35 Sedan]

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]

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

http://fordbarn.com/forum/showthread.php?t=41122&highlight=max+bore