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 Fuel Delivery Mods
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brentmc
Sitting Bull

112 Posts

Posted - 07 Jun 2016 :  11:21:33 PM  Show Profile  Reply with Quote
I am quite certain that I have a fuel leak at the sending unit gasket of my tank. I am going to drain and drop in the next couple of days. While I am doing so I was thinking that I may install an in tank fuel pump or electric pump. I currently have a Holley mechanical pump.

Any suggestions or things to consider/plan for? I am open ears and eyes.

Brent

If your not living on the edge you're taking up too much room.

cortcomp
Coyote

USA
5438 Posts

Posted - 08 Jun 2016 :  09:43:38 AM  Show Profile  Visit cortcomp's Homepage  Reply with Quote
Is this for carb or EFI?
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brentmc
Sitting Bull

112 Posts

Posted - 08 Jun 2016 :  5:05:19 PM  Show Profile  Reply with Quote
Carb.....it is a Holley 750 but I have plans on going back to the original Quadajet

Brent

If your not living on the edge you're taking up too much room.
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GtoGuy32
Crazy Horse

USA
851 Posts

Posted - 08 Jun 2016 :  11:19:58 PM  Show Profile  Reply with Quote
I am using a Mallory 140 gph pump on my unit, running at 7 psi and have it plumbed with a return line. It has fed my 467 well at the track and in all conditions.

Just a single data point, but it has been a good fuel pump.

Are you planning on building some bigger power? What is your current engine setup and what are you using the car for?

Dave
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brentmc
Sitting Bull

112 Posts

Posted - 09 Jun 2016 :  12:19:12 AM  Show Profile  Reply with Quote
the motor is about as built as it is going to get for quite a while.

400 bored out .30 over w/ 455 crank
edelbrock d-port heads
performance rpm intake
holley 750
forged pistons, xe 256 cam
dougs headers, 3" exhaust
built up 200-4r
moser 3.73 rear end

No racing involved, may run the strip a time or two just to see what I can do with it. Other than that just normal cruising and hotrodding around.

One modification I have considered and contacted Cliff about was a Qjet rebuild and that is about it.

Brent

If your not living on the edge you're taking up too much room.
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jack56
Tribal Scout

USA
2 Posts

Posted - 01 Oct 2018 :  02:25:32 AM  Show Profile  Reply with Quote
Have you had it fixed?
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Brian R
Crazy Horse

USA
1705 Posts

Posted - 09 Oct 2018 :  12:16:02 PM  Show Profile  Reply with Quote
I have a 461 with a Cliff built Quadrajet. Best carb I have ever had, going on 5 years and apx 35,000 miles and have never done anything to it.

Regarding fuel pump and lines: My gauge has been messed up for years and I plan to drop the tank this winter for a new sending unit/float. I am positive that the fuel lines are factory 1971 so I will replace while the tank is out. I do not race so I wonder if I should:
a. bother with larger lines
b. go electric pump
The current fuel pump is 3 years old and I like the fact that the previous one lasted for at least the 17 years that I owned the car previous to replacing it. They are cheap, reliable as heck and very easy to replace. Is there truly any reason to go electric for a car that seems to get plenty of fuel with the mechanical? Same actually goes for running bigger lines - is there any reason? Again, not a track car. I've had it for 20 years and never taken it to the track.

Thanks
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cortcomp
Coyote

USA
5438 Posts

Posted - 09 Oct 2018 :  8:51:46 PM  Show Profile  Visit cortcomp's Homepage  Reply with Quote
I don't see any advantage if you're not running at the track. Bigger lines are for less restriction and more flow, which you're not really using on the street. If you want factory correct lines, i love inline tube.
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