AEM Pumps

[Shaun]

Hi
Anyone any experience of these?

AEM Electronics 380lph Inline High Flow Fuel Pump

The AEM 380lph inline high flow fuel pump for high performance naturally aspirated and forced induction EFI vehicles. This fuel pump can be installed externally or in tank using optional hardware that can be purchased separately. This pump utilizes the standard

www.demon-tweeks.com

I was thinking of 2 of them to feed my swirl pot then out via an AEM filter aka

AEM Electronics High Flow Fuel Filter

The AEM universal high flow -10 AN inline filter is specifically engineered for maximizing flow without sacrificing filtration. The end caps have a -10AN female fitting which allows the filter to flow up to 12.32 gpm at 45 PSI and 2.63 gpm at 6 PSI. The grooves on the end of the machined o ring...

www.demon-tweeks.com

Cheers

 

[Ed McClements]

I thought you'd be using a couple of low-pressure pumps (one per main tank) to feed the swirl pot, then one of these:-

from swirl pot to fuel rail -> fuel pressure regulator -> back to swirl pot. Correct me if I'm wrong, but I don't think you want to feed your swirl pot via an unregulated high-pressure supply (90-ish PSI) from an EFI pump. You're likely to blow the swirl pot seams.

Like this, but with two low-pressure pumps. The important thing about a swirl pot (surge tank) is that it must be kept full, and have provision for an air bleed from the top back to the main tanks. Providing your low-pressure pumps can keep up with demand from the engine, it's relatively simple, and it works well.

 

[Ian Anderson]

I would agree with Eddy

Only change would be to return the fuel rail fuel to the swirl tank.
the reason being if your tank pump sucks air in very quick time you will empty your swirl pot.

On my car from half tank down with spirited driving and braking I can hear the low pressure pump sucking air as the fuel sloshes forward. When this happens the HP injector pump only has the swirl tank volume to work on!

on acceleration fuel sloshes back and the L
p pump refills the swirl.


if I was to do it again I would add hydra at to the bottom of both tanks.

ian

 

[Bill Kearley]

I went with Holly fuel mats, primary filter, main pump, secondary filter, fuel rail, regulator and return to the tank. Mount fuel pump as low as possible near the tank.

 

[Shaun]

Hi all
Yes aiming for 2 LP pumps feeding the swirl pot, thing was on the spec it said
"naturally aspirated and forced induction EFI vehicles"
hence I wondered if they could be used as a LP pump but further down the spec I noticed it all seemed to be HP specs so probably no good. Did look at Facets but have heard some mixed reviews on them.
Mick suggested Mitsuba ones but they are rare these days it seems, Paul Bav uses them in his SGT
I am feeding the swirl pot via two LP pumps then swirly pot out to filter, HP pump and filter then fuel rail, regulator and back to pot, Pot overflow goes to whichever tank is supplying the fuel.
Anyone any thoughts on Facets?
Cheers

 

[Ian Anderson]

Facet? About 250 hp max or they will battle to keep up.

Carter does some ones that seem to,last, Paul Walton has them And driven a lot of miles.

if you can fit the hydra mat!

ian

 

[Shaun]

Holley Red tops any good? seem a good flow rate 97GPH at 7 psi?

 

[Bill Kearley]

Ian, I sit and think, mmm Other than tank mods I don't know.

 

[MarkR]

Anyone any thoughts on Facets?

Two tanks being drained simultaneously by two pumps = 500 BHP capacity.

I can't imagine when I'd need to use that much power continuously for there to be any chance of a problem ..... or when I'd have that much available in the first place

This is the likely route I'll be taking with my 347 engine.

 

[Shaun]

I'm sort of with Mark here, odd blast down the road not aiming for Spa, the tanks are not all that big, any drain for a while and I'll be popping to Esso all the time
All good info chaps most of the build is understanding all the options, we could of course just buy a supercar but where is the fun in that!!

 

[Ian Anderson]

Electric Fuel Pump 100GPH

roadcraftuk.co.uk

so if you turn on both pumps at the same time where does the overflow go?
my guess the swirl etc will be closer to one side so the lower length of return pipe on that side will mean the flow goes there, possible overfill one tank?

Holley pumps are reported to be very good but the reports also say they are very noisy.

ian

 

[MarkR]

In my case I'll running both pumped feeds into a single regulator and then onto a carburettor which, if I'm correct, doesn't need a return feed to the tank.

I guess it's questions like this that make the argument for a tank-to-tank balance pipe a lot stronger.
At least with one of those you only need to return fuel to one tank ..... I think.

 

[Shaun]

Hi Ian
In my setup you cannot have both pumps at the same time, as you fire a pump up it opens a valve that back feeds that same tank its pumping from
Noise may not be an issue, stroked 302 with straight pipes may hide the pump noise
Happy days

 

[Ian Anderson]

In my case I'll running both pumped feeds into a single regulator and then onto a carburettor which, if I'm correct, doesn't need a return feed to the tank.

I guess it's questions like this that make the argument for a tank-to-tank balance pipe a lot stronger.
At least with one of those you only need to return fuel to one tank ..... I think.

That would work as the carb float chamber is the reservoir to keep the engine running for any air sucked into the pump.it would work past the float needle at the carb. And no you should not need a return, though sometimes they are used to help reduce heat soak in the feed pipes causing hot fuel whic evaporates and can cause difficult hot starting.

ian

 

[Ed McClements]

There's an online fuel rate calculator here:- https://www.raceworks.com.au/calculators/fuel-pump-calculator/

Which suggests that you need about 175 litres per hour for 500hp, running continuously at full chat. A couple of Carter or Hardi fuel pumps - one per tanks - should comfortably exceed that, giving some headroom. There are very few places in the UK where you could hold a GT40 flat-out for any appreciable length of time so that you'd be consuming the full 175 litres/hour....are there?

If you're feeding the output of your fuel pressure regulator on the fuel rail back to one of the tanks, your low-pressure pump needs to keep up with the full flow rate of the high-pressure pump, or the latter will empty the swirl pot back into the tank. An alternative is to feed the output of the fuel rail regulator back into the swirl pot, in which case the low-pressure pump only needs to keep up with the fuel consumed by the engine, essentially keeping the swirl pot topped-up to replace what is being used. There is a slight disadvantage, in that the fuel circulated via the rail and back to the pot will be warmed, but if the swirl pot is large enough and has some air flow to it this should be manageable.

 

[Ian Anderson]

There's an online fuel rate calculator here:- https://www.raceworks.com.au/calculators/fuel-pump-calculator/

Which suggests that you need about 175 litres per hour for 500hp, running continuously at full chat. A couple of Carter or Hardi fuel pumps - one per tanks - should comfortably exceed that, giving some headroom. There are very few places in the UK where you could hold a GT40 flat-out for any appreciable length of time so that you'd be consuming the full 175 litres/hour....are there?

If you're feeding the output of your fuel pressure regulator on the fuel rail back to one of the tanks, your low-pressure pump needs to keep up with the full flow rate of the high-pressure pump, or the latter will empty the swirl pot back into the tank. An alternative is to feed the output of the fuel rail regulator back into the swirl pot, in which case the low-pressure pump only needs to keep up with the fuel consumed by the engine, essentially keeping the swirl pot topped-up to replace what is being used. There is a slight disadvantage, in that the fuel circulated via the rail and back to the pot will be warmed, but if the swirl pot is large enough and has some air flow to it this should be manageable.

Correct Eddy the swirl pot fuel can get warm - in which case on the return from the rail to the swirl insert a fuel cooler.Lots available and used on small diesel engine cars.
as an example

2004 PEUGEOT 407 SALOON 1.6 HDI DIESEL FUEL RETURN PIPE COOLER | eBay

REMOVE FROM PEUGEOT 407 1.6 HDI,2004 YEAR SALOON,110 BHP,5 SPEED MANUAL GEARBOX,PAINT CODE EZWD GREY. MY AIM IS TO MAKE SURE YOU ARE ALWAYS 100% HAPPY! WHAT YOU SEE IN THE PICTURES IS WHAT YOU WILL RECEIVE!

www.ebay.co.uk

Ian

 

[Shaun]

Ok so seems Holley Red Tops need to be at the same level as the tank which mine cannot be
Found a Carter but am I correct on that a vane pump needs to be gravity fed?

Carter P4601HP Carter Universal Rotary Vane Electric Fuel Pumps | Summit Racing

Free Shipping - Carter Universal Rotary Vane Electric Fuel Pumps with qualifying orders of $109. Shop Fuel Pumps at Summit Racing.

www.summitracing.com

Does it need to be a lift pump? Mine are about 350mm from the lowest part of the tank pickup

 

[Neil]

Shaun, I use the Carter P4600HP fuel pump; it is the internally pressure regulated version of that pump. It is mounted about 8" above the bottom of my fuel cell but that does not cause any problems.

 

[Shaun]

Cheers Neil will take a look

 

[Shaun]

That's Reds out from the horses mouth so to speak!!

Thank you for contacting Holley Tech.
Holley Red fuel pumps such as 12-801-1 must be mounted below fuel tank in order to work properly.