Re: Which In tank electric fuel pump...for Carburetor ...to buy?
[Re: GLR]
#2421208
12/19/17 11:33 PM
12/19/17 11:33 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
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Don't think you are going to find a carb spec in tank fuel pump.
I know Chrysler put them in M bodies back in the day, but they tend to seize up quick because the unbaffled tank lets them suck air. Never had one last.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Which In tank electric fuel pump...for Carburetor ...to buy?
[Re: GLR]
#2421343
12/20/17 08:44 AM
12/20/17 08:44 AM
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Joined: Aug 2011
Posts: 2,865 Pattison Texas
CSK
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I have a Tanks Inc. tank & pump on my 68 Charger & have a carb, I run a return regulator, 3/8 supply & 3/8 return, runs 6psi, works great.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: Which In tank electric fuel pump...for Carburetor ...to buy?
[Re: frank]
#2421662
12/20/17 11:26 PM
12/20/17 11:26 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
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In tank pumps are reliable. If setup properly. Hang it on the end of the stock pickup tube in an unbaffled tank and you will find it is no longer reliable.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Which In tank electric fuel pump...for Carburetor ...to buy?
[Re: GLR]
#2421665
12/20/17 11:33 PM
12/20/17 11:33 PM
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Joined: Aug 2011
Posts: 2,865 Pattison Texas
CSK
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Here is the EFI tank I used, it has baffles.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: Which In tank electric fuel pump...for Carburetor ...to buy?
[Re: GLR]
#2421732
12/21/17 02:55 AM
12/21/17 02:55 AM
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Joined: Jan 2004
Posts: 8,294 fredericksburg,va
cudaman1969
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fredericksburg,va
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Strange, my plastic gas tank on my Carravan has no baffles, and no sump, just the canister with the pump-filter and fill gauge all in a drop in piece. They have a spring setup that adjusts the pump to the depth of tank. Why can't something like that be retroed in an existing tank? In fact, I have 4 non working ones from various cars that I scrounged out of the junk pile of the fix it shop next door to compare. Biggest thing is making a new lid to seal to tank, I like the idea of the no return line, bypassing back into tank, then dead head with a Holly pressure reg set at 6-7 pounds.
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Re: Which In tank electric fuel pump...for Carburetor ...to buy?
[Re: Supercuda]
#2422103
12/22/17 12:03 AM
12/22/17 12:03 AM
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Joined: Feb 2003
Posts: 2,138 tucson az
frank
top fuel
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top fuel
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tucson az
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In tank pumps are reliable. If setup properly. Hang it on the end of the stock pickup tube in an unbaffled tank and you will find it is no longer reliable. Well, Yeah
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Re: Which In tank electric fuel pump...for Carburetor ...to buy?
[Re: GLR]
#2422335
12/22/17 03:48 PM
12/22/17 03:48 PM
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Joined: Mar 2007
Posts: 3,285 West Coast, USA
jbc426
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As stated above, running an in-tank pump for a carb can successfully be done a variety of ways without much trouble on lower horsepower applications.
Problems arise though when you try to feed higher horsepower motors with the low pressure pumps that are available. You can use a bypass regulator system, but that has issues and added plumbing.
Cavitation and fuel tank slosh are other issues that you have to keep in mind when designing high volume, low pressure systems.
Modern cars all use dead head fuel systems with pulse width modulation controlled by the ECU. These are all relatively high pressure systems though. No one has overcome the issues with trying to control low fuel pressure pumps using pulse width modulation yet.
I'm using a work around using a high volume, low pressure, two speed fuel pump on a bypass regulated system with the Holley Hydramat pick-up to deal with the fuel control issues in the tank.
The fuel volume is controlled with a simple open/closed switch. Openning the secondaries triggers increased volume from the fuel pump, while at cruise on the primaries it operates at a much lower output. This keeps the fuel pump cooler, so it lives longer on the street. I mounted mine outside the tank for easier access, but it could have been mounted inside the tank.
This is the pump I chose. 40402 Pump: 160 GPH @ 15 PSI - RATED UP TO 800HP This 200 GPH free flow rating fuel pump is programmed to deliver the maximum flow with the lowest current draw available. Nothing else like it
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: Which In tank electric fuel pump...for Carburetor ...to buy?
[Re: jbc426]
#2422382
12/22/17 06:05 PM
12/22/17 06:05 PM
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Joined: Aug 2011
Posts: 2,865 Pattison Texas
CSK
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master
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Posts: 2,865
Pattison Texas
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As stated above, running an in-tank pump for a carb can successfully be done a variety of ways without much trouble on lower horsepower applications.
Problems arise though when you try to feed higher horsepower motors with the low pressure pumps that are available. You can use a bypass regulator system, but that has issues and added plumbing.
Cavitation and fuel tank slosh are other issues that you have to keep in mind when designing high volume, low pressure systems.
Modern cars all use dead head fuel systems with pulse width modulation controlled by the ECU. These are all relatively high pressure systems though. No one has overcome the issues with trying to control low fuel pressure pumps using pulse width modulation yet.
I'm using a work around using a high volume, low pressure, two speed fuel pump on a bypass regulated system with the Holley Hydramat pick-up to deal with the fuel control issues in the tank.
The fuel volume is controlled with a simple open/closed switch. Openning the secondaries triggers increased volume from the fuel pump, while at cruise on the primaries it operates at a much lower output. This keeps the fuel pump cooler, so it lives longer on the street. I mounted mine outside the tank for easier access, but it could have been mounted inside the tank.
This is the pump I chose. 40402 Pump: 160 GPH @ 15 PSI - RATED UP TO 800HP This 200 GPH free flow rating fuel pump is programmed to deliver the maximum flow with the lowest current draw available. Nothing else like it what kind of problems with a return set up? I have a high pressure EFI pump on mine with a carb, been doing it that way for 20 years.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: Which In tank electric fuel pump...for Carburetor ...to buy?
[Re: CSK]
#2422505
12/22/17 11:41 PM
12/22/17 11:41 PM
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Joined: Mar 2007
Posts: 3,285 West Coast, USA
jbc426
master
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master
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Posts: 3,285
West Coast, USA
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[/quote]
what kind of problems with a return set up? I have a high pressure EFI pump on mine with a carb, been doing it that way for 20 years. [/quote]
I think you may have misunderstood my point. Return systems, properly done work very well, although having a high pressure pump running at full power constantly on a street driven car is not ideal.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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