Placement of electric fuel-pump.

Will you be using the plug on the bottom of the tank as the supply?

I'm not sure. Going to pick up fittings tomorrow if I have the time, so that is why I was hoping to see what has been done here first.

Electric pumps are designed to remain primed and not run dry, that means bottom exit from tank to pump or a more modern approach using a pump that is fully immersed in the tank itself. The latter may interfere with the fuel gauge sender though.

I think most have used the bottom exit tank plug to feed a pump mounted on the side of the chassis rail where the engine mounts sit.

Good luck,
Julian

Install a fitting off the bottom of the tank to a low mounted pump, a banjo style fitting would be the most low profile way to go. We've discussed what type of fitting is needed in the past, so do a search of this forum. The line between tank & pump should be 1/2", AN-8 or 12 mm. Put a filter in line between tank & pump for the first two or three tanks of gas, then remove that filter. Of course, there should be a filter between pump & carburetor too, that filter should be permanent.

My 2 cents.
Holley pumps-noisey and loud even with a good sound/vibration isolators.
Mallory pumps- Nice and quiet some even have built in regulators.
Jeff

I had a couple of Holleys. Because they do not bypass any fuel internally, they run hot. I think it hurts the durability. I am now using an Aeromotive. It bypasses some fuel to keep it cooler and still produces more pressure and volume than you need.

I had twin Holley reds on the GT40 and canned them in the end in favor of Carters.

Julian

Heed the warnings about Holley fuel pumps. They have a terrible reputation everywhere on the 'Net.

My two cents ... mechanical pumps are better, safer, quieter, and easier to install. RobbMc Performance has two well built mechanical pumps available that will support 550 & 1100 BHP.

If you must use an electric fuel pump, search the 'net under Aeromotive & Magna Flow for some good ones.

I really like the consideration that went into this config ...

I run a Holley mechanical pump, though.

With regard to the fuel pick-up fitting for the bottom of the fuel tank (the one that replaces the drain plug); I've read many postings that describe various adapters and custom made fittings but I've never read where anyone suggested simply using an M22 x 1.5 banjo bolt and an M22 x -10AN male banjo. Despite comments to the contrary, they are readily available. I bought mine from B.A.T. in Florida about two years ago.

On top of the tank you have beside the contacts for the fuel-gauge the exit fuel line, but what is this for? This line, I can't see where it ends.

That hose goes to the carbon canister on the other side of the engine bay. It's the big round blue "can" that also has another hose that attaches to the air cleaner (stock config). It vents the gas tank vapors through the carbon filter in the canister and then into the air cleaner.

I agree with George ..I;m going to be using a Mechanical fuel pump ... electric pumps are noisy and dangerous. They keep pumping when the engine stalls ... the Holley has to be mounted down low to keep it primed and cannot be exposed to the heat of the engine otherwise the rubber components and dirt from the bottom of the tank requires a strainer otherwise they fail.

They make Mechanical pumps that out perform any electric pump.

Ron

Look here;

http://www.robbmcperformance.com/products/amc550.html

I ended up with the Mallory 110 series, a Mallory regulator, and 500 series cannister filter. Just used an M22 to -8 positionable elbow on the bottom of the tank. Installed an Earls shut off valve for good measure.

Previous to the set up in the pictures below I had the same Mallory pump that was installed with a smaller (About 2" in diameter) inline filter and 1/2" hose on the inlet side. The pump crapped out in <20 hours of run time. I sent the failed pump in with a sh!t-gram and they told me they could tell from the scoring on the rotor that it had been run dry. Mallory said the typical inline filters are too restrictive and starve the pump on high demand. They recommended a cannister filter on inlet side because the pumps are very sensitive to debri and dual -8 lines on the inlet side to prevent the starvation issue. I bought and installed the cannister filter but only ran a single -8 line to the cannister filter because I just didn't have enough room and two -8 lines seemed a bit excessive. It also has an inline filter upstream of the pump as well. -Couple years gone by and not a problem since.

My fuel pressure stays steady as a rock under high load. Oil filter is a little harder to get at with this location but no too bad. Everything is above the bottom of the frame rails. Thought about some expanded metal to protect the lines from road trash but opted not to.

I must say the Mallory folks were pretty cool about the whole deal considering I sent them a sh!t-gram with the return. Their service guy called me upon receipt of the pump with lot's of helpful suggestions and replaced the pump under warranty. Never heard a Holley pump but I think the Malllory pump is pretty noisey though it doesn't bother me much as I can only hear it before the engine fires .

-Kelly

Thanks for the photos. Just finnished of the instalation today. In princip, and placement of parts, it looks much like Panterrors setup. As for the noice-issue, I find the pump NOT noisy, and as with Panterrors comment, as soon as the engine fires it's not an issue! DAMN it is noisy. Havent heard it run until today, so today is a good day.

Norway is a better place today!

Are you guys able to drive the roads there yet?

quote:

Are you guys able to drive the roads there yet?

Hmmm....as opposed to Calgary, when I was there Monday and it was snowing.

Julian

Kelly,

You have a very valid point stating you dont hear the pump with the engine running and superior job on the installation as always.

Ron

Thanks Ron. Hope you're weathering the economic storm OK and maybe getting some time to work on your car.

Take Care,
Kelly

Its slowing down ... but we have increased our Service Contracts and PM contracts ... with the thought & hope that companies will fix old equipment rather then install new stuff.... it sure looks like thats whats going on because our service business is kicking but new construction is GONE.

Yes I; have been progressing on the car.

Thanks

The Holley electric fuel pumps have actually been very reliable for me. I like that I can hear the pump when I go to start the car. It lets me know that I am getting fuel pressure.
When the car is running you really don't hear it.

Some people that I know shut the electric pump off when the car is running and have it on a seperate toggle switch on the dash...wait, son of a gun, so do I.

They all do work better mounted down low and an in line earls fuel filter close to the tank is a great idea as well as the shut off valve.

We already covered the adapter part number for the tank drain plug. That's a little bit of a trick part to get.

A banjo fitting would be of a lower profile and thus less at risk from road debris.

As far as new work being gone Ron yes, but so is all work. Only had two days of work so far this year. I don't think that is a good sign.