Suction Fuel Pump

mackruss · **Posted:** Tue Nov 10, 2009 11:39 am

I recently fitted a suction fuel pump in the engine bay which it was designed for.

The spec says that it is a suction pump and not a pressure pump. The pressure pump has a slightly different spec in pressure only but delivers the same volume per hour.

So, does it make any difference by doing this except that the pump is sucking the fuel instead of creating a positive pressure when installed in tank or close to the tank.

dirtmover · **Posted:** Tue Nov 10, 2009 1:07 pm

mackruss wrote:

So, does it make any difference by doing this except that the pump is sucking the fuel instead of creating a positive pressure when installed in tank or close to the tank.

Creating a positive pressure throughout the entire system is the only reason for adding a pump. I don't see any reason for adding a suction pump in the engine bay :shock:

. You already have one of these :!:

mackruss · **Posted:** Tue Nov 10, 2009 1:28 pm

dirtmover wrote:

mackruss wrote:

So, does it make any difference by doing this except that the pump is sucking the fuel instead of creating a positive pressure when installed in tank or close to the tank.

Creating a positive pressure throughout the entire system is the only reason for adding a pump. I don't see any reason for adding a suction pump in the engine bay :shock:

. You already have one of these :!:

Some of the old gassers have fuel pumps mounted in the engine bay to feed the carb at high volume and low pressure so this pump feeds my filter and assists the flow of fuel in the event of an air leak in the system.

This pump i'm using is designed to fit in the engine bay but for gasser engines feeding carbs. Thought i try it out and it works like a dream, also designed to handle the excessive heat that you would expect from the diesel motor.

tcoilburner · **Posted:** Tue Nov 10, 2009 1:36 pm

dirtmover is correct. I assume you want to add a pump because of a driveability problem. You can do one of two things, you can add a lift pump back in the tank or in-line near the tank, or you can fix the air leak in the system. Most fix it by adding the lift pump to pressurize the system (which the losy quick connections back by the tank were designed for).

You could replace the pipe an quick connects back by the tank with fuel hose and clamps,and the new fuel head and connector should fix the problem by the filter. just some suggestions :wink:

flman · **Posted:** Tue Nov 10, 2009 4:19 pm

mackruss wrote:

dirtmover wrote:

mackruss wrote:

Thought i try it out and it works like a dream, also designed to handle the excessive heat that you would expect from the diesel motor.

I always thought diesels were a little cold blooded :roll:

mackruss · **Posted:** Wed Nov 11, 2009 9:39 am

I've had a Facet pump in the engine bay which crapped out on me after three months :roll:

so i fitted another brand pump that is spec'd as a suction pump designed for fitting in the engine bay.

What good would it do fitting a suction pump near the tank that's delivering only 1.4 psi :roll:

Oh and yes the diesels i think run a lot hotter than their gas counterparts

007husky · **Posted:** Wed Nov 11, 2009 12:03 pm

mackruss wrote:

I recently fitted a suction fuel pump in the engine bay which it was designed for.

The spec says that it is a suction pump and not a pressure pump. The pressure pump has a slightly different spec in pressure only but delivers the same volume per hour.

So, does it make any difference by doing this except that the pump is sucking the fuel instead of creating a positive pressure when installed in tank or close to the tank.

Mackruss, people go all about telling that the pump is not good if installed in the engine bay, bolloks ! I have had a facet pump for almost a year now and since i ve installed it, had to prime my filter 0 times ! I ve checked a few times to crack the bleeder open, no air came out.

Since the install of the pump, no air has been found in my filter.

Not to mention that the cos of a facet pup (bout 50-60 bucks in the US) is MUCH cheaper, you don`t have to drop the tank and easier to install than an intank.

Perk your ears, i m not saying that the intank pump is not the way togo !... al im saying is that for little money, give it a chance. Worked flawlessly for me.

mackruss · **Posted:** Wed Nov 11, 2009 1:09 pm

007husky wrote:

mackruss wrote:

I recently fitted a suction fuel pump in the engine bay which it was designed for.

The spec says that it is a suction pump and not a pressure pump. The pressure pump has a slightly different spec in pressure only but delivers the same volume per hour.

So, does it make any difference by doing this except that the pump is sucking the fuel instead of creating a positive pressure when installed in tank or close to the tank.

Mackruss, people go all about telling that the pump is not good if installed in the engine bay, bolloks ! I have had a facet pump for almost a year now and since i ve installed it, had to prime my filter 0 times ! I ve checked a few times to crack the bleeder open, no air came out.

Since the install of the pump, no air has been found in my filter.

Not to mention that the cos of a facet pup (bout 50-60 bucks in the US) is MUCH cheaper, you don`t have to drop the tank and easier to install than an intank.

Perk your ears, i m not saying that the intank pump is not the way togo !... al im saying is that for little money, give it a chance. Worked flawlessly for me.

I'm in total agreement. The Facet worked fine but the wiring snapped off right at the pump itself and i tried to fix it but at the cost to replace them i gave up and bought a slightly more expensive pump and installed it and it's working geat.

It's much easier to install in the enginebay and i've not had to prime at all.

The confusion is that some pumps are called pressure pumps and some are called suction pumps. I'm no engineer but the suction pump i installed now works great. :wink:

Suction Fuel Pump

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