Pressurized center main bearing?

[BRENT in 10-uh-C]

Originally Posted by 1928 Sport Coupe

[ModelA29;2289017]Jim Brierley's book 4 Bangers and me has a photo on page 39 where the tube is feeding all 3 mains. I'd think an orifice in the line would be desired to make sure the other areas still get enough oil.]

I have a few questions about this thread.
If you pressurize the center main bearing why not all three?
Is there any advantage or disadvantage to doing all three?
Would the oil tubes in the valve chamber going to the bearings need to be plugged? Or could the pressurized oil be run through the valve chamber tubes?
How would either affect the oiling to the camshaft.
I have not had a Model A engine apart in 30 or so years so I am a little rusty on the internal workings.
Sorry if I ask stupid or too many questions.
Thanks

In a nutshell, there really isn't a need to pressurize all three. The size of the rear main bearing is WAY more adequate than needed, and it receives plenty of oil thru gravity. If you were to pressurize the rear main, then you must figure out how to effectively, -and reliably seal the rear of the rear main to keep it from leaking oil out into the flywheel housing. The tubes that feed the mains are the same tubes as used for the horn rod and the center hood rod. They are a rolled tube that will leak if pressure is added. The camshaft oiling is not compromised.

[alexiskai]

Originally Posted by BRENT in 10-uh-C

I guess I should start by saying these aren't my design. I have been purchasing these from Ron's Machine over the years.

If anyone's interested, I called Ron's and they said the kits are available for general purchase for $45 plus shipping.