The Ford Barn

charles in east texas · 08-12-2013, 03:53 PM

Do 39 thermostats go in the head or in the hose at radiator?
What is the ideal fuel pressure to carburator for a stock 53 V/8?
Thanks, Charles

ford38v8 · 08-12-2013, 04:03 PM

'39 stats drop into the head, flush with the top of the hose bib, held there by contact of the hose itself, being of the same diameter as the hose.

Ideal fuel pressure for all stock flathead Fords is between 2 and 3 pounds. Less than 1 pound will not consistently open the needle valve, starving the engine, and more than 4 pounds will hold that valve open, flooding the carburetor.

charles in east texas · 08-12-2013, 04:23 PM

Thanks,
I was told they went in the hose at the radiator, but I didn't think that was right.
2-3 pounds fuel pressure. Thanks again, Charles

ford38v8 · 08-12-2013, 04:34 PM

Sponsored Links (Register now to hide all advertisements)

Charles, I believe there is an aftermarket thermostat that goes in that location, but the stock Ford unit would be at the head.
I would think that a radiator location would be much less responsive than the location close to the source of the generated heat, but what do I know?

08-12-2013, 03:53 PM	#1
charles in east texas Senior Member Join Date: May 2010 Location: Winnsboro, Texas Posts: 463	39 Thermostats Do 39 thermostats go in the head or in the hose at radiator? What is the ideal fuel pressure to carburator for a stock 53 V/8? Thanks, Charles

08-12-2013, 04:03 PM	#2
ford38v8 Senior Member Join Date: Jul 2011 Location: SF Bay Area Posts: 6,645	Re: 39 Thermostats '39 stats drop into the head, flush with the top of the hose bib, held there by contact of the hose itself, being of the same diameter as the hose. Ideal fuel pressure for all stock flathead Fords is between 2 and 3 pounds. Less than 1 pound will not consistently open the needle valve, starving the engine, and more than 4 pounds will hold that valve open, flooding the carburetor. __________________ Alan

08-12-2013, 04:23 PM	#3
charles in east texas Senior Member Join Date: May 2010 Location: Winnsboro, Texas Posts: 463	Re: 39 Thermostats Thanks, I was told they went in the hose at the radiator, but I didn't think that was right. 2-3 pounds fuel pressure. Thanks again, Charles

08-12-2013, 04:34 PM	#4
ford38v8 Senior Member Join Date: Jul 2011 Location: SF Bay Area Posts: 6,645	Re: 39 Thermostats Sponsored Links (Register now to hide all advertisements) Charles, I believe there is an aftermarket thermostat that goes in that location, but the stock Ford unit would be at the head. I would think that a radiator location would be much less responsive than the location close to the source of the generated heat, but what do I know? __________________ Alan