Dual carbs
 

Flathead- Anyone run dual carbs with just mech pump?

Re: Dual carbs
 

A good mechanical pump, feeding the fuel to a fuel block, then to the carbs works great.
That is how the dual carb engine in my '36 has been hooked up since 1954..

Re: Dual carbs
 

I've run them that way in the past, on my '47, '51 and '53 however, the new gas (and other factors) have prompted me to go the electric fuel pump route.

Re: Dual carbs
 

Hi Vic I'm heading in that direction still trying to figure out a issue.

What is Fuel block? Pic?

Have an interment problem - driving w just mech pump car will begin to starve for fuel - hit elec pump and it corrects problem - it happens all different times - driving 40-50 or coming to stop at light

Re: Dual carbs
 

Your mech pump is faulty. A good one has all the flow you will ever need.

Re: Dual carbs
 

The mech fuel pump is fairly new. Like your thinking when car was doing this I replaced it.

I'm now thinking that my electric fuel pump (since its is well over 20 years old) - could it be a vacum leak with the rubber hoses connecting the electric fuel pump?

I am not leaking fuel, but could air cause same symptom?

thanks

Re: Dual carbs
 

Been running two 94's on a 59 AB with stock pump for a year. No problem's yet.

Re: Dual carbs
 

"Fuel block" - think small manifold. One fuel line in and multiple lines out. One line in from fuel pump and multiple lines out to carbs, fuel pressure gauge, etc. May be made from round, hexagonal or rectangular stock, with or without mounting feet, tabs, etc.
Check speed parts catalogs for pictures. Hope this helps.

Re: Dual carbs
 

Andy,
A couple things to be aware of.........
The obvious is an alcohol PROOF not resistant diaphragm
and
The valves in the pump should be phenolic not the common 'rubber' type
used in most store bought pumps. The 'rubber' ( don't know the actual material )
valves do seal better initially but do not hold up like the old style phenolics.
The above is my opinion only, I respect the opinion of everyone here.
Charlie ny

Re: Dual carbs
 

Charlie

I heard a lot of good things about your pumps - do u sell just the diaphragm/rubber or does one need to buy whole pump?

Re: Dual carbs
 

[QUOTE=adileo;1095167]Hi Vic I'm heading in that direction still trying to figure out a issue.

What is Fuel block? Pic?

In my earlier contribution to this thread I meant to attach a pix of the dual carb setup on my '36 w/59AB, had a brain hiccup and lost my train of thought.
The fuel block and fuel lines are clearly visible mounted to the left side of the firewall.
The manifold is a Offie Super, wide spread, carbs are Stromberg 97's.. Fan mount is a cut down '39 2 brush generator with the blade mounted in the stock position.
Generator is a side mount attached to the right head..
I have two oil bath air cleaners, gutted out for paper filters, because the '36 was my daily driver for many years. I operated the car on many unimproved roads and construction sites in Idaho and other western states.

Re: Dual carbs
 

[QUOTE=blucar;1095869]I love the fact that this was a daily driver for you. That's just awesome!

Re: Dual carbs
 

I have run the stock pumps of which Charlie NY rebuilt all over the place and for years in my avatar and my old 40 coupe. I do have an electric setup in line for cold starts and then I shut it off.

But I will repeat myself here here on this forum in that I have used a capfull of Yamalube on every fill up for the same amount of time. Look it up - it's what the boaters use to keep the effects of the alcohol in the gas at bay and keeps the rings free since their engines sit for long periods of time like some of ours do ...

Re: Dual carbs
 

Tom

Their motor oil, 2 stroke oil or their outboard oil? Curious about this.

Tim

Re: Dual carbs
 

i have been driving flatheads since high school (1955-59) and i have had nothing but problems with mechanical fp's and always go electric. vapor lock used to drive me nuts but i have never had vapor lock with an electric pump, didn't know you could. i know all about tradition and keeping things stock and you can run everything to look stock or toggle switch your electric so you can shut it off, or whatever. but, i really do think it is wise to have one. just my humble opinion.

Re: Dual carbs
 

Sounds like wise advise.

Re: Dual carbs
 

Folks I know how threads can get off track:)

I have an electric pump

I have an interment problem - driving w just mech pump car will begin to starve for fuel - hit elec pump and it corrects problem - it happens all different times - driving 40-50 or coming to stop at light

I liked running off mech pump and only use elec as backup and cold starts.

I'm thinking now that the issues is old rubber lines to electric pump which is over 20 yrs old - like barns feedback if that could be culprit

Re: Dual carbs
 

Is the electric pump allowing enough fuel through it when it is switched off and only the mechanical pump is working?
May be there is a blockage in the line or at the tank which moves from time to time and it needs the power of the electric pump to overcome it.

I had a 39 once that had a small piece of stone that used to suck in and out of the fuel pick up in the tank at various times and it nearly drove me nuts till I found it.

Re: Dual carbs
 

Kinda off topic, but can't resist posting a bit of "Old School" prankery..
During the late '40's a common prank to play on "car guys" was to drop a few grapes into someones fuel tank.. The grapes would roll around in the tank until one of them came in contact with the fuel pickup tube. The grape would suck tight to the fuel line cutting off the flow. Once the engine died the pressure would bleed off, releasing the grape. It might be several days before the grape again came into contact with fuel line, killing the engine. In the mean time many repairs to the fuel/electrical systems had been done.
In about 1947 a friend of mine had a '36 Ford 2dr slant back, all dolled up with the accessories of the time, the car would quit running about once a week, poor Eddy was at his wits end trying to figure out what was wrong with that car. To add to his problems he had a very violent temper, which he would loose when the car quit, on several occasions Eddy tore an antenna off of the car and beat it with the antenna like it was a bad kid. Of course this caused a lot of body damage which Eddy would have to have repaired..