Weber and Electric Fuel Pump guys chime in here
Nov 30, 2010 | 07:47 AM
#1
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From: Wilkes-Barre, PA, USA
Weber and Electric Fuel Pump guys chime in here
What are you guys running for an electric pump and where have you mounted it. Photos would be nice as well. I know there are a lot of recomendations here for which fuel pump, but they are all scattered about.
I know the carter one has been used and advised by alot of people including myself.
These are currently the ones I am looking at to feed my Holley 12-804 1-4psi regulator. Although according to racetep I can ditch the regulator altogether to gain a better flowrate. Problem is they list the 4070 as 60-70 gph @ 4psi, summit lists it as 72 gph @ 6psi. I think the next two will be too much for my setup.
Carter GP4070 72 gph <= 6psi $75.95 @ Summit
Holley "red" 12-801-1 97 gph <= 7psi $107.95 @ Summit
Summit Racing SUM-G3136-1 95 gph <= 7psi $79.95 @ Summit (this one seems to be a "rebranded" holley red specs and looks are real similar
I know the carter one has been used and advised by alot of people including myself.
These are currently the ones I am looking at to feed my Holley 12-804 1-4psi regulator. Although according to racetep I can ditch the regulator altogether to gain a better flowrate. Problem is they list the 4070 as 60-70 gph @ 4psi, summit lists it as 72 gph @ 6psi. I think the next two will be too much for my setup.
Carter GP4070 72 gph <= 6psi $75.95 @ Summit
Holley "red" 12-801-1 97 gph <= 7psi $107.95 @ Summit
Summit Racing SUM-G3136-1 95 gph <= 7psi $79.95 @ Summit (this one seems to be a "rebranded" holley red specs and looks are real similar
Last edited by xxxtreme22r; Nov 30, 2010 at 08:14 AM.
Nov 30, 2010 | 01:43 PM
#3
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From: Wilkes-Barre, PA, USA
i will probably keep it on there so I can drop it down to 1.5psi when off-roading till I get a chance to modify it for angles etc etc.
but this is where it gets wierd:
from racetep:
From the weber troubleshooting guide:
from carbs only.com
but this is where it gets wierd:
from racetep:
Fuel Pumps and Fuel Pressure:
Fuel delivery is critical to the proper performance of any Weber carb. From a basic 32/36 DGEV to a set of Triple Sidedraft DCOE's. Webers rely on a stable full float bowl in order to mix the fuel and air correctly. Mechanical pumps very rarely do this. They pulse fuel instead of giving a smooth even delivery and the amount of fuel varies with engine RPM.
A Proper Electric Fuel pump will give the best performance and most stable tuning for any Weber carb application. We use only High Volme and Low Pressure pumps. Webers work best at approx 4 psi of fuel pressure (Not 2 psi like many of the older books stated.) and you need Volume not Pressure to keep the float bowl full.
We ONLY use the Carter Rotary pumps. They are High Volume (60-70 GPH) but only 4 psi. This is PERFECT for all Weber applications from a Single 32/36 DGV on a Truck, Jeep or Car to a Triple Sidedraft setup on a Road Race car making 300 HP...This pump DOES NOT and SHOULD NOT use a Pressure Regulator for any reason. That is why we use it....
Fuel delivery is critical to the proper performance of any Weber carb. From a basic 32/36 DGEV to a set of Triple Sidedraft DCOE's. Webers rely on a stable full float bowl in order to mix the fuel and air correctly. Mechanical pumps very rarely do this. They pulse fuel instead of giving a smooth even delivery and the amount of fuel varies with engine RPM.
A Proper Electric Fuel pump will give the best performance and most stable tuning for any Weber carb application. We use only High Volme and Low Pressure pumps. Webers work best at approx 4 psi of fuel pressure (Not 2 psi like many of the older books stated.) and you need Volume not Pressure to keep the float bowl full.
We ONLY use the Carter Rotary pumps. They are High Volume (60-70 GPH) but only 4 psi. This is PERFECT for all Weber applications from a Single 32/36 DGV on a Truck, Jeep or Car to a Triple Sidedraft setup on a Road Race car making 300 HP...This pump DOES NOT and SHOULD NOT use a Pressure Regulator for any reason. That is why we use it....
Test the fuel pressure output with a fuel pressure gauge. If the fuel pressure
exceeds 3.5 psi, install a fuel pressure regulator.
exceeds 3.5 psi, install a fuel pressure regulator.
from carbs only.com
Always check the fuel pump setting. Weber Carburetors only require 2.5 to 3.0 PSI fuel pressure. If fuel pressure is higher than 3.0 PSI a pressure regulator is needed.
Dec 1, 2010 | 08:29 AM
#5
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From: Wilkes-Barre, PA, USA
I will if I wind up getting one, doing research now, likely do this when spring comes around. Kinda strapped on cash right now even for the 4070. If I get the fuel pump, then I am also getting a oil pressure cut-off switch for it as well. which means another relay etc etc. As they tend not to play well when starting a vehicle and there is 0 oil pressure. Don't want to run a switch on it in order to bypass the cut-off switch. I know how to do it though so.
Last edited by xxxtreme22r; Dec 1, 2010 at 08:31 AM.
Dec 1, 2010 | 12:24 PM
#7
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From: Wilkes-Barre, PA, USA
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Dec 1, 2010 | 03:26 PM
#8
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Joined: Jan 2005
Posts: 140
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From: Wenatchee, WA
When I did mine, I just picked up an inline sort of electric pump and mounted it to the frame rail just behind the FROR style t-case mount I made. I also used a regulator to be able to limit the fuel pressure.
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