The Ford Barn

flathead4dr · 08-30-2013, 12:44 PM

What should the oil pressure be with drilled crank, filter, alum. Head, duel carb ??

Richard in Anaheim CA · 08-30-2013, 01:08 PM

Your oil pressure will depend on how tight the system was built. Every little place the oil can escape, every bearing that isn't minimum and every oil diverted somewhere other than bearings will reduce your oil pressure. Where you place the pickup for your gauge will affect your perceived oil pressure also.

That being said, ideally maybe 35 or 40 psi when the oil is cold, 15 or 20psi when it's hot. When the weather is hot, you have been driving hard, stop and idle, probably almost none.

Richard
Anaheim CA

marc hildebrant · 08-30-2013, 03:49 PM

Richard,

Is that for a stock Model A ? It seems high.

My stock engine runs around 15 lbs at start but drops to maybe 5 at 45 MPH when hot.

Marc

1931 flamingo · 08-30-2013, 04:05 PM

Mark: He's got a drilled crank and probably full pressure system. Not a stock one.
Paul

V4F · 08-30-2013, 05:48 PM

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my full pressure system is preset @ 20# . to much causes leaks . my stock motor had like 8-10 cold & 2-0# hot ................

08-30-2013, 12:44 PM	#1
flathead4dr Senior Member Join Date: May 2010 Location: Eastern WA Posts: 107	Mod A engine oil system What should the oil pressure be with drilled crank, filter, alum. Head, duel carb ?? __________________ Old Fords make funny noises.

08-30-2013, 01:08 PM	#2
Richard in Anaheim CA Senior Member Join Date: May 2010 Location: Anaheim California Posts: 551	Re: Mod A engine oil system Your oil pressure will depend on how tight the system was built. Every little place the oil can escape, every bearing that isn't minimum and every oil diverted somewhere other than bearings will reduce your oil pressure. Where you place the pickup for your gauge will affect your perceived oil pressure also. That being said, ideally maybe 35 or 40 psi when the oil is cold, 15 or 20psi when it's hot. When the weather is hot, you have been driving hard, stop and idle, probably almost none. Richard Anaheim CA

08-30-2013, 03:49 PM	#3
marc hildebrant Senior Member Join Date: May 2010 Location: Cape Cod Posts: 1,128	Re: Mod A engine oil system Richard, Is that for a stock Model A ? It seems high. My stock engine runs around 15 lbs at start but drops to maybe 5 at 45 MPH when hot. Marc

08-30-2013, 04:05 PM	#4
1931 flamingo Senior Member Join Date: May 2010 Location: new britain,ct 06052 Posts: 9,390	Re: Mod A engine oil system Mark: He's got a drilled crank and probably full pressure system. Not a stock one. Paul

08-30-2013, 05:48 PM	#5
V4F Senior Member Join Date: May 2010 Location: ca. Posts: 2,522	Re: Mod A engine oil system Sponsored Links (Register now to hide all advertisements) my full pressure system is preset @ 20# . to much causes leaks . my stock motor had like 8-10 cold & 2-0# hot ................ __________________ V4f