The Ford Barn

V8guy · 03-06-2022, 03:39 PM

In looking thru my parts collection for a future 59A build I have 2 sets of 29 A rods. How much beyond the standard big end Dis. of 2.360 can I go with out having the rods reconditioned or look for oversize OD bearings.

Ol' Ron · 03-06-2022, 05:50 PM

with the standard bearing being .220" thick, you can calculate your clearances. I try to get .002" on the od and .0025 on ithe Id. I always save the old bearings I get before rebuilding. Some of the cad Nickle bearings would flake off under hi oil pressure. This happened during the first few years of racing when I was told to run the hi volume oil pump and #80 pressure. It also broke a cramkshaft cutit off in the filit radius of the crank "Cavation Erosin" The people in the test lad at Bullards said. Still have the picture. Making mistakes , makes you smarter!!
Gramps

flatford8 · 03-06-2022, 08:14 PM

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“ Making mistakes , makes you smarter!!”
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03-06-2022, 03:39 PM	#1
V8guy Member Join Date: Sep 2013 Location: Milwaukee Wi Posts: 91	29 A connecting rods big end In looking thru my parts collection for a future 59A build I have 2 sets of 29 A rods. How much beyond the standard big end Dis. of 2.360 can I go with out having the rods reconditioned or look for oversize OD bearings.

03-06-2022, 05:50 PM	#2
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,985	Re: 29 A connecting rods big end with the standard bearing being .220" thick, you can calculate your clearances. I try to get .002" on the od and .0025 on ithe Id. I always save the old bearings I get before rebuilding. Some of the cad Nickle bearings would flake off under hi oil pressure. This happened during the first few years of racing when I was told to run the hi volume oil pump and #80 pressure. It also broke a cramkshaft cutit off in the filit radius of the crank "Cavation Erosin" The people in the test lad at Bullards said. Still have the picture. Making mistakes , makes you smarter!! Gramps

03-06-2022, 08:14 PM	#3
flatford8 Senior Member Join Date: Jan 2012 Location: Lyman,ME. Posts: 2,889	Re: 29 A connecting rods big end Sponsored Links (Register now to hide all advertisements) “ Making mistakes , makes you smarter!!” A lot of wisdom for so few words!…..Mark __________________ I'm thinkin' about crankin' My ragged ol' truck up and haulin' myself into town. Billy Joe Shaver…RIP