I found my old thread on fuel flow.
In a nut shell. 1 minute to fill 3/4 of a pint.
I removed everything except the fuel pump.
I just filled a 2.5 gallon gas can.
It took 35 minutes.
2.5 gallons * 4 = 10 quarts
10 quarts / .75 = 13.3 (3/4 quarts)
35 minutes / 13.3 quarts = 2.6 minutes to fill 3/4 quarts.
It seems that the fuel pump is pumping less than half than it should.
Or is my math wrong some place.
Fuel Flow part II
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Mustang1964s
Topic author - Posts: 254
- Joined: Sun Jan 06, 2019 10:48 pm
- First Name: Steve
- Last Name: Bourgeois
- * REQUIRED* Type and Year of Model Ts owned: 1914, 1926
- Location: Waco, TX
- MTFCA Number: 29784
- MTFCI Number: 22970
- Board Member Since: 2007
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Mark Gregush
- Posts: 4962
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- First Name: Mark
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- * REQUIRED* Type and Year of Model Ts owned: 1925 cutdown PU, 1920 Dodge touring, 1948 F2 Ford flat head 6 pickup 3 speed
- Location: Portland Or
- MTFCA Number: 52564
- Board Member Since: 1999
Re: Fuel Flow part II
2.5 gallons would be 10 quarts which would be 20 pints. 20 into 35 = 1.75 pints per minutes that would be 1 and 3/4 cups. Maybe the flow rate looks low, the bowl only fills as needed and may be sufficient for its needs. ?
I know the voices aren't real but damn they have some good ideas! 
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
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Bill Coyle
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- First Name: Bill
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Re: Fuel Flow part II
Hi, Thinking about my Model T running 30 miles per hour.... I get some where between 15 and 20 miles per gallon. Using the lowest figure 15, I would burn 2 gallons in an hour (30 miles). Your pump puts out 2.5 gallons in 35 minutes or (2.5/35)×60 = 4.3 gallons per hour. Therefore like Mark said, your fuel pump flows a little more than 2 times as much as required for traveling on flat ground here in northern Ohio. Hope that is what you are asking. Bill
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Bill Coyle
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Re: Fuel Flow part II
If you just meant to compare it to your old measurement, 2.5 gal = 10 quarts or 20 pints. 20 pints/35 mins = .57 pints per min. Bill
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Mustang1964s
Topic author - Posts: 254
- Joined: Sun Jan 06, 2019 10:48 pm
- First Name: Steve
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- Location: Waco, TX
- MTFCA Number: 29784
- MTFCI Number: 22970
- Board Member Since: 2007
Re: Fuel Flow part II
The beast that I am feeding is a speedster with a touring Frontenac head.
I put the fuel regular in line and did another test.
2 gallons took 23 minutes.
It seems a little faster, definitely not a accurate science experiment.
Now to try to run it and see how far I can go.
I put the fuel regular in line and did another test.
2 gallons took 23 minutes.
It seems a little faster, definitely not a accurate science experiment.
Now to try to run it and see how far I can go.
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Mustang1964s
Topic author - Posts: 254
- Joined: Sun Jan 06, 2019 10:48 pm
- First Name: Steve
- Last Name: Bourgeois
- * REQUIRED* Type and Year of Model Ts owned: 1914, 1926
- Location: Waco, TX
- MTFCA Number: 29784
- MTFCI Number: 22970
- Board Member Since: 2007
Re: Fuel Flow part II
I made some changes in the fuel line setup.
Current configuration now pumps 2 gallons in 28 minutes.
Is this going to feed my thirsty beast?
Current configuration now pumps 2 gallons in 28 minutes.
Is this going to feed my thirsty beast?
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Susanne
- Posts: 1051
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- * REQUIRED* Type and Year of Model Ts owned: Late '15 touring, "Angel".
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Re: Fuel Flow part II
4 gallons an hour? Darn, that sounds anemic for a hot engine, depending how you're feeding it and how hard you push it. I think that's what I spend, maybe a hair less but not much, on my slightly fast but not Fronty-engined '15 touring... I may be wrong, but yeah, I can get more than that out of my gravity fed stock system...
My feeling (and it's like an opininon, and everyone knows what those are worth
) is you want a fuel system that is capable of putting slightly more than what your engine accelerating and holding to WOT will accept, and use your carb float to regulate. If you jump on it hard and it drains your float bowl faster than it refills, then you need more fuel.
And that advice is worth exactly what I charged for it!
My feeling (and it's like an opininon, and everyone knows what those are worth
) is you want a fuel system that is capable of putting slightly more than what your engine accelerating and holding to WOT will accept, and use your carb float to regulate. If you jump on it hard and it drains your float bowl faster than it refills, then you need more fuel.And that advice is worth exactly what I charged for it!