Floatless Carburetors
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Tadpole
Topic author - Posts: 553
- Joined: Wed Jul 28, 2021 7:17 am
- First Name: Tad
- Last Name: Glahn
- * REQUIRED* Type and Year of Model Ts owned: 1925 Coupe, 1926 TT Closed Cab, 1924 Runabout
- Location: Grant's Lick, Kentucky
- Board Member Since: 2021
Floatless Carburetors
Has anyone ran a Carburetor made without a float on their T with success? Seems like something that would have caught on if they worked as well as they claimed? I ask this question with little carburetor knowledge so thank you for your patience.
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speedytinc
- Posts: 4725
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- First Name: john
- Last Name: karvaly
- * REQUIRED* Type and Year of Model Ts owned: 14/15 wide track roadster. 23 touring, 27 roadster pickup, 20ish rajo touring
- Location: orange, ca
- Board Member Since: 2020
Re: Floatless Carburetors
Do you know of an example that has no float? If such a thing exists, how is incoming fuel regulated?
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Scott_Conger
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- * REQUIRED* Type and Year of Model Ts owned: 1919
- Location: not near anywhere, WY
- Board Member Since: 2005
Re: Floatless Carburetors
They are vacuum operated devices. Typically a fine needle on the end of a vacuum pot...as vacuum occurs, the higher pressure below, lifts the pot, opening the regulating needle (which is tapered to vary the mixture of fuel). Some features such as the pot/needle are similar to an SU, but are NOT the exact same thing...they just share a few principles. I'm aware of a couple versions but am not by any means a student of them.
I don't think there was one which could compete with U&J, Zenith S4BF, etc.
At best, I think they were an alternative to stock carbs (NH, L-4, etc). They were fit to lots of cars and I think their scarcity today is indicative of their popularity.
I don't think there was one which could compete with U&J, Zenith S4BF, etc.
At best, I think they were an alternative to stock carbs (NH, L-4, etc). They were fit to lots of cars and I think their scarcity today is indicative of their popularity.
Scott Conger
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves™
Obsolete carburetor parts manufactured
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves™
Obsolete carburetor parts manufactured
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Tadpole
Topic author - Posts: 553
- Joined: Wed Jul 28, 2021 7:17 am
- First Name: Tad
- Last Name: Glahn
- * REQUIRED* Type and Year of Model Ts owned: 1925 Coupe, 1926 TT Closed Cab, 1924 Runabout
- Location: Grant's Lick, Kentucky
- Board Member Since: 2021
Re: Floatless Carburetors
Thank you Mr. Conger, your carburetor knowledge is invaluable!
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Erik Johnson
- Posts: 1055
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- First Name: Erik
- Last Name: Johnson
- Location: Minneapolis, MN
Re: Floatless Carburetors
You've probably seen a floatless carburetor on a lawn mower or snow blower.
Example of a carburetor with no bowl or float on this 1959 Briggs and Stratton from a Toro reel mower. It draws fuel directly from the tank.
This style of carburetor is still in use today - refer to second photo of a new one.
Example of a carburetor with no bowl or float on this 1959 Briggs and Stratton from a Toro reel mower. It draws fuel directly from the tank.
This style of carburetor is still in use today - refer to second photo of a new one.
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Craig Leach
- Posts: 1906
- Joined: Tue Jan 08, 2019 12:22 am
- First Name: craig
- Last Name: leach
- * REQUIRED* Type and Year of Model Ts owned: 1919 Firetruck/1922 Speedster
- Location: Laveen Az
Re: Floatless Carburetors
Hi Erik,
Technicaly that carb has a bowl that is open on top and the level is controled by the bowl that will spill the excess back into the tank. The short
tube draws fuel from bowl & the long tube is attached to a pulse pump that draws fuel from the tank. Don't get me wrong I used those Carbs. In
Kart racing on Methonal years ago and they work great. I just don't want the gas tank hanging under the carberator on my T. The vacuum
controled flow is still used today in weed-eaters & leaf blowers in states they are still legal. They were used in updraft carbs on aircraft for a
long time and even on Harley-Davisons but are signifacantly more suffisticated than what was available for T's. I dought I would be able to put
up with what I would get from most T'ers if I put a side draft Tillotson on my T.
Craig.
Technicaly that carb has a bowl that is open on top and the level is controled by the bowl that will spill the excess back into the tank. The short
tube draws fuel from bowl & the long tube is attached to a pulse pump that draws fuel from the tank. Don't get me wrong I used those Carbs. In
Kart racing on Methonal years ago and they work great. I just don't want the gas tank hanging under the carberator on my T. The vacuum
controled flow is still used today in weed-eaters & leaf blowers in states they are still legal. They were used in updraft carbs on aircraft for a
long time and even on Harley-Davisons but are signifacantly more suffisticated than what was available for T's. I dought I would be able to put
up with what I would get from most T'ers if I put a side draft Tillotson on my T.
Craig.
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Craig Leach
- Posts: 1906
- Joined: Tue Jan 08, 2019 12:22 am
- First Name: craig
- Last Name: leach
- * REQUIRED* Type and Year of Model Ts owned: 1919 Firetruck/1922 Speedster
- Location: Laveen Az
Re: Floatless Carburetors
Hi Erik,
On second thought you are correct there is no float in that carb I was thinking bowl not float sorry if I miss spoke.
Craig.
On second thought you are correct there is no float in that carb I was thinking bowl not float sorry if I miss spoke.
Craig.