The Ford Barn

1962300 · 01-06-2018, 11:20 PM

I have an electrical sending unit in the back of the block feeding the gauge on the dash.

Since there is another "line out" feed, next to my current sending unit, I would like to add a small mechanical gauge to live there under the hood.

Anyone know what numbers I need the gauge to go up to?
60 pounds?
80 pounds?
More?
Less?
What max pressure is normal for this year flathead?

Thanks!

pooch · 01-07-2018, 12:23 AM

What does your existing gauge say ?

That should give you a guide.

It would prob be wiser to use the other fitting for a by pass filter.

tubman · 01-07-2018, 07:04 AM

I don't know about the '46-'48 cars, but factory specifications for an 8BA engine is for the relief valve to open at 57 lbs. Given this, I think an 80 lb gauge would be a better choice.

edhd58 · 01-07-2018, 06:57 PM

Sponsored Links (Register now to hide all advertisements)

Mine runs 50lbs at 60mph. I'd go with an 80lb gauge to be on the safe side.

01-06-2018, 11:20 PM	#1
1962300 Senior Member Join Date: Jan 2011 Location: Long Beach, CA Posts: 181	1946-1948 Flathead Oil Pressure I have an electrical sending unit in the back of the block feeding the gauge on the dash. Since there is another "line out" feed, next to my current sending unit, I would like to add a small mechanical gauge to live there under the hood. Anyone know what numbers I need the gauge to go up to? 60 pounds? 80 pounds? More? Less? What max pressure is normal for this year flathead? Thanks! __________________ Matt Allyn 1932 Ford Roadster / 1949 Mercury Coupe / 1949 Harley Davidson "45" / 1957 Cadillac Eldorado Biarritz Convertible / 1957 Lincoln Premiere Convertible / 1959 Lambretta TV175 / 1962 Sunbeam Alpine Convertible / 1962 Chrysler New Yorker Station Wagon / 1962 Chrysler 300H / 1962 Chrysler 300 Sport / 1964 International Travelall / 2015 Tesla Model S

01-07-2018, 12:23 AM	#2
pooch Senior Member Join Date: Sep 2010 Location: South Coast NSW Australia Posts: 2,596	Re: 1946-1948 Flathead Oil Pressure What does your existing gauge say ? That should give you a guide. It would prob be wiser to use the other fitting for a by pass filter.

01-07-2018, 07:04 AM	#3
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,319	Re: 1946-1948 Flathead Oil Pressure I don't know about the '46-'48 cars, but factory specifications for an 8BA engine is for the relief valve to open at 57 lbs. Given this, I think an 80 lb gauge would be a better choice.

01-07-2018, 06:57 PM	#4
edhd58 Senior Member Join Date: Jul 2014 Location: Guston,ky Posts: 653	Re: 1946-1948 Flathead Oil Pressure Sponsored Links (Register now to hide all advertisements) Mine runs 50lbs at 60mph. I'd go with an 80lb gauge to be on the safe side.