The Ford Barn

Paul Bishop · 05-06-2026, 07:58 PM

Has anyone put a Model B oil pump in their Model A engine and what changes were needed if it is done. I read this was possible to increase oil pressure

quickchange · 05-06-2026, 08:38 PM

yes no difference, pressure is controlled by resistance. to get more flow there are a number of things you can do ,reduce diameter of shaft, open up intake , we did one on a drilled crank etc & it blew the oil filter off at 90psi , drilled the pump stem & brazed on a relief valve from a V8 one ,Still got that pump after 45 years ,

Big hammer · 05-06-2026, 10:06 PM

I have a reprinted book with Fords service manual and in it it covers modifications to the original pump to increase oil volume ! I recommend everyone have a copy of the service manual !

Bob Bidonde · 05-07-2026, 09:53 AM

The Model A & B oil pumps are interchangeable and have the same performance. Pump B-6600 was A-6600-B.

J Franklin · 05-07-2026, 12:30 PM

Sponsored Links (Register now to hide all advertisements)

I have a B pump rebuild kit available if anyone might want to try it. Priced at "A" Kit price.

05-06-2026, 07:58 PM	#1
Paul Bishop Junior Member Join Date: Apr 2026 Posts: 6	Model B Oil Pump Has anyone put a Model B oil pump in their Model A engine and what changes were needed if it is done. I read this was possible to increase oil pressure

05-06-2026, 08:38 PM	#2
quickchange Senior Member Join Date: May 2010 Location: Nelson. New Zealand Posts: 2,069	Re: Model B Oil Pump yes no difference, pressure is controlled by resistance. to get more flow there are a number of things you can do ,reduce diameter of shaft, open up intake , we did one on a drilled crank etc & it blew the oil filter off at 90psi , drilled the pump stem & brazed on a relief valve from a V8 one ,Still got that pump after 45 years ,

05-06-2026, 10:06 PM	#3
Big hammer Senior Member Join Date: Jun 2014 Location: Land of Lincoln Posts: 3,631	Re: Model B Oil Pump I have a reprinted book with Fords service manual and in it it covers modifications to the original pump to increase oil volume ! I recommend everyone have a copy of the service manual ! __________________ Don't force it with a little hammer tap, tap, tap get a bigger hammer tap done

05-07-2026, 09:53 AM	#4
Bob Bidonde Senior Member Join Date: May 2010 Location: Long Island, NY Posts: 4,379	Re: Model B Oil Pump The Model A & B oil pumps are interchangeable and have the same performance. Pump B-6600 was A-6600-B. __________________ Bob Bidonde

05-07-2026, 12:30 PM	#5
J Franklin Senior Member Join Date: May 2010 Location: Oregon Posts: 6,581	Re: Model B Oil Pump Sponsored Links (Register now to hide all advertisements) I have a B pump rebuild kit available if anyone might want to try it. Priced at "A" Kit price.