View Single Post
Old 10-22-2019, 05:12 PM   #18
Synchro909
Senior Member
 
Synchro909's Avatar
 
Join Date: Jun 2014
Location: Melbourne, Australia
Posts: 7,496
Default Re: Model B crank in Model A

Quote:
Originally Posted by johnneilson View Post
The last "B" crank I put into a "A" block ground mains to 1.850 dia and used rod bearings from a saturn motor. The line bore just cleared the bolts.

Grinding the crank to "A" main dimensions is just asking for trouble, especially if cross drilled and the proper corner radius is not achieved.

If I remember correctly, the "B" crank flange will also probably need to be turned down to fit in the cap or block.

This is a logical conversion if going to turn up the power/compression and breathing.
Agree 110%
__________________
I'm part of the only ever generation with an analogue childhood and a digital adulthood.
Synchro909 is offline   Reply With Quote