The Ford Barn

jetmek · 07-17-2022, 09:47 AM

So if the pics load here is a new one on me. Set of FMco rods from a 8ba have the oil squirt holes in a different location so the holes in bearings dont line up? Rod next to it is from another set for comparison. Anyone else seen this? Prob not worth the effort to drill new holes. Whatta yall think?

deuce_roadster · 07-17-2022, 11:12 AM

For anything but an all-out Bonneville car, I can't believe any difference would be made by moving, enlarging or anything done to those holes.

cadillac512 · 07-17-2022, 11:29 AM

The hole won't matter,( I'd run it as-is) but if you prefer, dremel a small channel to connect the holes.

rotorwrench · 07-17-2022, 11:41 AM

Changing the bearing shell hole size will affect oil pressure. Their placement in the engine is listed in the overhaul manuals for directional purposes. They are directed one way on the right bank and another on the left bank. FoMo Co started using them in late 49 or early 1950 since the part number changed to the OBA prefix which obsoleted the 8BA prefix. Canadian engines may have had some difference or there was a change somewhere from early to late production. The bore hole may not have to align in the rod. It could be adjusted for an edge feed by carefully filing the port on an angle to allow it to feed through the shell hole. All the ones I have look like the top photograph in the OPs #1 post. I haven't seen one like the bottom photo yet.

Bored&Stroked · 07-17-2022, 11:49 AM

I kind of like the looks of the lower rod - just appears "beefier" to me - and a really nice forging.

Would be interesting to weigh the two on a gram scale - just for shits and giggles to see if they have different weights, or maybe "looks are deceiving". LOL

jetmek · 07-18-2022, 05:32 PM

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Well i have never run across a set like these. Im not going to try altering them. They clearly require a different bearing tho

Pete · 07-18-2022, 06:08 PM

Quote:

Originally Posted by deuce_roadster

For anything but an all-out Bonneville car, I can't believe any difference would be made by moving, enlarging or anything done to those holes.

What 2 roadster said.

jetmek · 07-18-2022, 06:30 PM

I get that. Asking if anyone has any info on them…canadian , japanese, edsel fords prototype ???

pistonbroke · 07-19-2022, 09:06 AM

I wish had a picture of them but back in high school I was given a 8ba which I disassembled to ring and bearing. Upon cleaning the rods my shop teacher and I noticed the squirt holes had never been drilled . So after seeing your rods I think ford changed things around a quite bit concerning the big end of the rods between 49 and 53. Tim

07-17-2022, 11:12 AM	#2
deuce_roadster Senior Member Join Date: Oct 2011 Location: Shelton, WA Posts: 3,800	Re: 8ba rod differences For anything but an all-out Bonneville car, I can't believe any difference would be made by moving, enlarging or anything done to those holes.

07-17-2022, 11:29 AM	#3
cadillac512 Senior Member Join Date: Apr 2019 Location: Kansas Posts: 922	Re: 8ba rod differences The hole won't matter,( I'd run it as-is) but if you prefer, dremel a small channel to connect the holes. __________________ "It don't take but country smarts to solve the problem" (Smokey Yunick) '41 Merc Town Sedan / 260" 8CM engine '66 Fairlane four door / "warmed up" 302

07-17-2022, 11:41 AM	#4
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,440	Re: 8ba rod differences Changing the bearing shell hole size will affect oil pressure. Their placement in the engine is listed in the overhaul manuals for directional purposes. They are directed one way on the right bank and another on the left bank. FoMo Co started using them in late 49 or early 1950 since the part number changed to the OBA prefix which obsoleted the 8BA prefix. Canadian engines may have had some difference or there was a change somewhere from early to late production. The bore hole may not have to align in the rod. It could be adjusted for an edge feed by carefully filing the port on an angle to allow it to feed through the shell hole. All the ones I have look like the top photograph in the OPs #1 post. I haven't seen one like the bottom photo yet.

07-17-2022, 11:49 AM	#5
Bored&Stroked Senior Member Join Date: Jan 2011 Location: Central Ohio Posts: 5,070	Re: 8ba rod differences I kind of like the looks of the lower rod - just appears "beefier" to me - and a really nice forging. Would be interesting to weigh the two on a gram scale - just for shits and giggles to see if they have different weights, or maybe "looks are deceiving". LOL

07-18-2022, 05:32 PM	#6
jetmek Senior Member Join Date: May 2010 Location: albany Posts: 466	Re: 8ba rod differences Sponsored Links (Register now to hide all advertisements) Well i have never run across a set like these. Im not going to try altering them. They clearly require a different bearing tho __________________ engine and component overhauls my specialty! Website- www.godevilgarage.com

07-18-2022, 06:30 PM	#8
jetmek Senior Member Join Date: May 2010 Location: albany Posts: 466	Re: 8ba rod differences I get that. Asking if anyone has any info on them…canadian , japanese, edsel fords prototype ??? __________________ engine and component overhauls my specialty! Website- www.godevilgarage.com

07-19-2022, 09:06 AM	#9
pistonbroke Senior Member Join Date: Feb 2021 Location: Perry Mo. Posts: 485	Re: 8ba rod differences I wish had a picture of them but back in high school I was given a 8ba which I disassembled to ring and bearing. Upon cleaning the rods my shop teacher and I noticed the squirt holes had never been drilled . So after seeing your rods I think ford changed things around a quite bit concerning the big end of the rods between 49 and 53. Tim