The Ford Barn

Bob Bidonde · 06-03-2022, 09:54 AM

If I put an oil pressure gauge on a Model "B" engine, how much pressure would I see on the gauge while cruising at 50 MPH?

Jim Brierley · 06-03-2022, 11:56 AM

With hot oil, probably less than 1 lb. With cold oil, maybe 3 lbs.

CWPASADENA · 06-03-2022, 11:55 PM

My "B" engine will run 6 lbs. hot at 2000RPM. About 1 lb. at idle. Babbit bearings, about 18K miles on engine.

Chris W.

Benson · 06-04-2022, 03:23 AM

My Model B engine with Babbitt and 20 K (ON REBUILD) runs 2 to 3 lbs hot at Idle (450 RPM) and 8 to 9 at 60 MPH.

Bob Bidonde · 06-04-2022, 08:33 AM

Thanks all for your replies. I thought that the Model "B" would develop higher oil pressure than you all report. I likely will not bother to install an oil pressure gauge.

johnneilson · 06-04-2022, 08:44 AM

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Bob
The B motor in stock form is not a pressurized system. It is an attempt at directing the oil to the bearings. With a couple small modifications the system can be pressurized. Of course pump and drive will need attention too. I run approximately 30-35 psi on street motors and 60-70 on the race motors.
John

johnneilson · 06-04-2022, 08:45 AM

Bob
The B motor in stock form is not a pressurized system. It is an attempt at directing the oil to the bearings. With a couple small modifications the system can be pressurized. Of course pump and drive will need attention too. I run approximately 30-35 psi on street motors and 60-70 on the race motors.
John

Synchro909 · 06-04-2022, 07:27 PM

My B motor is equipped with a warning light, not a gauge. The light comes on at 9 psi and the only time I see it is when doing a Right hand turn - that's when the pump is drawing in air, not oil. Actual pressure at 50 mph - I don't know but it's enough.

06-03-2022, 09:54 AM	#1
Bob Bidonde Senior Member Join Date: May 2010 Location: Long Island, NY Posts: 4,113	Model "B" Oil Pressure If I put an oil pressure gauge on a Model "B" engine, how much pressure would I see on the gauge while cruising at 50 MPH? __________________ Bob Bidonde

06-03-2022, 11:56 AM	#2
Jim Brierley Senior Member Join Date: Jun 2010 Location: Temecula, CA Posts: 4,251	Re: Model "B" Oil Pressure With hot oil, probably less than 1 lb. With cold oil, maybe 3 lbs.

06-03-2022, 11:55 PM	#3
CWPASADENA Senior Member Join Date: May 2010 Location: PASADENA, CA Posts: 1,931	Re: Model "B" Oil Pressure My "B" engine will run 6 lbs. hot at 2000RPM. About 1 lb. at idle. Babbit bearings, about 18K miles on engine. Chris W.

06-04-2022, 03:23 AM	#4
Benson Senior Member Join Date: May 2010 Location: Cen~Col - Central Highlands Posts: 2,757	Re: Model "B" Oil Pressure My Model B engine with Babbitt and 20 K (ON REBUILD) runs 2 to 3 lbs hot at Idle (450 RPM) and 8 to 9 at 60 MPH. Last edited by Benson; 06-04-2022 at 11:00 AM.

06-04-2022, 08:33 AM	#5
Bob Bidonde Senior Member Join Date: May 2010 Location: Long Island, NY Posts: 4,113	Re: Model "B" Oil Pressure Thanks all for your replies. I thought that the Model "B" would develop higher oil pressure than you all report. I likely will not bother to install an oil pressure gauge. __________________ Bob Bidonde

06-04-2022, 08:44 AM	#6
johnneilson Senior Member Join Date: Jun 2010 Location: 34.22 N 118.36 W Posts: 1,181	Re: Model "B" Oil Pressure Sponsored Links (Register now to hide all advertisements) Bob The B motor in stock form is not a pressurized system. It is an attempt at directing the oil to the bearings. With a couple small modifications the system can be pressurized. Of course pump and drive will need attention too. I run approximately 30-35 psi on street motors and 60-70 on the race motors. John __________________ As Carroll Smith wrote; All Failures are Human in Origin.

06-04-2022, 08:45 AM	#7
johnneilson Senior Member Join Date: Jun 2010 Location: 34.22 N 118.36 W Posts: 1,181	Re: Model "B" Oil Pressure Bob The B motor in stock form is not a pressurized system. It is an attempt at directing the oil to the bearings. With a couple small modifications the system can be pressurized. Of course pump and drive will need attention too. I run approximately 30-35 psi on street motors and 60-70 on the race motors. John __________________ As Carroll Smith wrote; All Failures are Human in Origin.

06-04-2022, 07:27 PM	#8
Synchro909 Senior Member Join Date: Jun 2014 Location: Melbourne, Australia Posts: 8,043	Re: Model "B" Oil Pressure My B motor is equipped with a warning light, not a gauge. The light comes on at 9 psi and the only time I see it is when doing a Right hand turn - that's when the pump is drawing in air, not oil. Actual pressure at 50 mph - I don't know but it's enough. __________________ I sometimes wonder what happened to the people who asked me for directions. Even at my age, I still like to look at a young, attractive woman but I can't really remember why.