519" SOHC Build

[WConley]

Bill -

Excellent explanation.  This agrees perfectly with what I learned at Ford and in tribology (lubrication) classes in grad school.

A journal bearing creates its own oil film by pulling oil in from a source.  There only needs to be enough oil available to keep that film going under all conditions.  Actual pressure inside the bearing film reaches thousands of psi, way beyond the capability of our oil pumps.

The benefit of excess oil flow is to carry away heat, especially in rod bearings.  You want as much volume flow as the system (clearances) will support without building up excessive pressure.  Like you explained, too much pressure just wastes power and beats on cam gears, etc.

[ScotiaFE]

I thought the factory was 110 psi at the filter mount and then a vent at
the rear main at about 80 psi.
I have two stock vent springs and one is thicker than the other.
Melling pegs the sideoiler at 125 psi at the gauge.
During Jay's oil test and using my basic math skills this is what I think I would see at the rear main bearing.
110 psi on the gauge at the filter mount. 84 psi at the rear main bearing at 180* oil temp.
Approximately 24% reduction.
The Genesis block is not actually drilled for the vent at the rear of the block
This is right in line with what Ford was doing back in the day.
I plan on spinning my 427 to at least 7500 rpm.
I love the sound of a high winding pump. 

[Djr031987]

Hey I am working on a SOHC build myself, I was trying to hunt down one of those Paul Monroe gear drive sets. I was hoping you could tell me where you got yours from. It would greatly appreciated.

[jayb]

You can get them directly from Paul; his email address is paul_munro1@bigpond.com.  I believe he has a US distributor on the East coast, but I don't know the guy's name.  Email Paul and I'm sure he can give you the info.  He doesn't always respond to emails real fast, so give him a few days to respond after you send him one.