In Tank Fuel Pump for Carburetor

[hrosenthal]

I'm thinking of going with an in tank fuel pump, and Breeze has a few that fit right into the FFR tank.
I'm not sure which to get for a carburetor - any suggestions are appreciated.
Thanks

[68GT500MAN]

Depending on the pump you might also need a pressure regulator and return line. Carburetors work on a LOT lower pressure than fuel injection.
Doug

[Desert Cobra]

I used a Holley carb. Visit their web site for lots more information. Most take between 4 and 6 of pressure. Many in tank pumps are for fuel injection, have a fuel return line to the tank and put out a lot more pressure. Some also have two pumps: one in tank lower pressure and one external of a much higher pressure. I don't think a low pressure in tank pump that is designed as part of a two pump fuel injection system is the best way to go. Don't forget to leave one of the trunk block off plates (in roadster) with some way to get at the in tank pump if you go that way.

[Avalanche325]

And make sure you have an inertia switch.

Why not a mechanical pump with one line running to the front?

[edwardb]

I'm thinking the same thing... why? Nothing much simpler than a mechanical pump on the front corner of the engine if you're running with a carb. No return line required, no electricity required, easy to service, relatively inexpensive to replace, no regulator required, etc. Keeps the tank end real simple too. Worked well for generations and still does.

[QSL]

we used a mechanical fuel pump and its great. But we also have weber carbs and an electric pump would have been nice so i could shut it down to avoid boil over. But thats a weber issue.

[rlhobt]

I went with the Breeze 255LPH in-tank pump for my carbed setup so that I could easily switch to fuel injection in the future if I wanted to. I used a Mallory 4309 (I think) fuel pressure regulator and 3/8 feed and return lines. One problem I had was that the return fitting on the pump was to small for the volume of fuel returned at idle, and I couldn't get the pressure below 8. I ended up drilling a hole in the tank and installing an AN bulkhead fitting for the return line. So far, no problems. And if I ever decide to go FI, I'll just need a new higher pressure regulator and engine-room plumbing.

HTH,

Rich

[Bob Cowan]

The electric fuel pump does not control the pressure, regardless of which pump you use. That's why you need a fuel pressure regulator. IMO, a return style regulator is a good thing to use, because it keeps fresh fuel moving through the line all the time; which prevents fuel starvation on hard acceleration, and prevents vapor lock on hot days.

Use the low pressure mallory regulator mentioned above and mount it very close to the carb.

[SCFFR]

x3 on the good ol' mechanical pump. I have a Holley unit feeding the Holley Street Avenger 770 cfm carb on my 410W engine. Very simple and works great. I did use the fuel pick up assembly from Breeze to replace the in-tank pump that came with the fuel tank I got from the salvage yard.

Ron

[hrosenthal]

I went with the Breeze 255LPH in-tank pump for my carbed setup so that I could easily switch to fuel injection in the future if I wanted to. I used a Mallory 4309 (I think) fuel pressure regulator and 3/8 feed and return lines. One problem I had was that the return fitting on the pump was to small for the volume of fuel returned at idle, and I couldn't get the pressure below 8. I ended up drilling a hole in the tank and installing an AN bulkhead fitting for the return line. So far, no problems. And if I ever decide to go FI, I'll just need a new higher pressure regulator and engine-room plumbing.


The more I think about it, I'd like to go with an in tank pump.

If I used a Breeze 155 with a pressure regulator, I should be ok without drilling a hole in the tank, correct?

[hrosenthal]

I'm just wondering, does the return line need to be a hard line? Is there a reason not to use a braided hose?

[Bob Cowan]

I'm just wondering, does the return line need to be a hard line? Is there a reason not to use a braided hose?

No reason not to. I used braided line only for feed and return. I little more expensive, but a lot easier to do.

[rlhobt]

The more I think about it, I'd like to go with an in tank pump.

If I used a Breeze 155 with a pressure regulator, I should be ok without drilling a hole in the tank, correct?

My guess would be yes, it should be sufficient, since I came very close with the 255. How big is your engine and carb? You'll want to be sure that you are delivering enough fuel with the 155 to avoid fuel starvation at WOT.

Rich

[GThompson]

I have Webers and am using an in-tank pump from a Volvo 240, I grafted it onto the stock Mustang sending unit. I had first start a few days ago and fuel delivery is not yet a problem. I'm using it with a Holley pressure regulator to knock it down to 3 psi. Also using all braided hose.

[Scott Zackowski]

I'm thinking of going with an in tank fuel pump, and Breeze has a few that fit right into the FFR tank.
I'm not sure which to get for a carburetor - any suggestions are appreciated.
Thanks

hrosenthal,

Whitby Motorcars (see Vendor link), I believe, is now putting in-tank fuel pumps in most of their roadster builds (including Carb versions). Give them a call, I am sure they would help you out. Your other option would be to talk to Mark Reynolds at Breeze. He is always willing to help.

As the others have stated, I am fairly certain most in-tank pumps are designed for fuel injection, so a regulator would be required to bring the fuel pressure down to say 7 psi or less. Most Carb applications do not require a return line, but I do not know if that applies with an in-tank pump.



Mk IV, Complete Kit, FFR 7304