cd.thomson
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| posted on 31/12/08 at 11:45 AM |
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EFI fueling system
Morning everybody!
I'm about to buy my fueling system to fit a duratec (as soon as everyone gets back to work on Monday  ) but I don't really know where to
start.
I was originally going to fit a pinto, so: tank > fuel cut off valve > inline nylon filter > low pressure fuel pump > filter king >
dellortos
I understand I need a higher pressure pump for EFI. The word "facet" seems to float around on ebay a lot too. Any advice for a setup with
associated trusted suppliers would be greatly appreciated.
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omega0684
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| posted on 31/12/08 at 12:02 PM |
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you cannot use a the low pressure fuel pumps of an EFI System you need to get a high pressure pump! im running a pinto with efi and my set up
go's
tank, low pressure pre-pump filter, HIGH PRESSURE Fuel Pump, high pressure fuel filter, then Trottle Body inlet, then fuel pressure regulator and
finally return pipe back to the tank.
[Edited on 31/12/08 by omega0684]
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BenB
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| posted on 31/12/08 at 12:14 PM |
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You can run a low pressure pump initially if you're running a swirl pot system. Some people don't bother and just run the high pressure
pump (but equally some people run into problems).
Tank = low pressure filter = low pressure pump = swirl pot = high pressure pump = high pressure filter= fuel rail
You'll still need a high pressure pump though. Preferably one rated to your estimated BHP.
If you know you're estimated BHP you can work out your estimated fuel requirements and then choose a suitable pump. You can either try and find
a second hand (try "inline Bosch fuel pump" in Ebay), look in various old VWs, or buy a new one for about £45 off Ebay).
The return from the fuel rail should ideally go back to to tank. Some people get away with running the fuel rail return into the swirl pot. Only
problem then is if you're sat in traffic the fuel will be circulating around in the engine bay and gradually get hotter and hotter. Returning to
the tank means cool fuel.... Worth it?!?!?!
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rusty nuts
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| posted on 31/12/08 at 12:15 PM |
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Does your fuel tank have a built in swirl pot(reservoir) ? If not one way to get around not having one is to install a separate swirl pot fed by a
low pressure pump(Facet?) which in turn feeds the high pressure pump via a fuel filter . If your tank has a swirl pot built in you do not need an
external pot and low pressure pump and it may be possible to use an in tank pump .
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cd.thomson
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| posted on 31/12/08 at 12:21 PM |
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Cheers guys...
So...what on earth is a swirl pot?
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AdamR
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| posted on 31/12/08 at 12:33 PM |
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Sure, you could fit a low pressure pump, swirl pot, HP pump and 2 filters etc etc, but why not make life easy for yourself and fit an in tank
EFI pump like this:
Includes a built in swirl pot and level sender - all you need extra is a HP fuel filter.
Only downside is that you need a tank around 25cm high. Here's my implementation with the sender suitably adapted:
 
fuel pump in the tank
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AdamR
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| posted on 31/12/08 at 12:38 PM |
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PS. The above is a Land Rover item, of which there are a few similar variations. See
this one on ebay.
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cd.thomson
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| posted on 31/12/08 at 12:49 PM |
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I dont really want to mess with the fuel tank, its complete as sent by Dax and I can't weld..
Everything has to be external.
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BenB
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| posted on 31/12/08 at 03:50 PM |
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A swirl pot takes the fuel from the low pressure pump. It's like an expansion tank for fuel (or that's how I think of it).
It's jobs are to remove air and provide a steady flow of fuel.
IE fuel comes in at the top at an angle, swirls round the sides of the tank, loses any air-bubbles as it goes, pick-up from the bottom of the tank to
the high pressure pump.
This one's got extra attachments at the top incase you want to put the hot fuel coming back from the fuel rail back into the swirl pot to ensure
it gets even hotter 
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dave1888
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| posted on 31/12/08 at 05:27 PM |
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Heres one suggestion
 
Rescued attachment 20l_swirl_pot.gif
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dave1888
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| posted on 31/12/08 at 05:28 PM |
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and another
 
Rescued attachment 20l_without_swirl_pot.gif
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mark chandler
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| posted on 31/12/08 at 06:48 PM |
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No need to throw lots of cash at a branded pump, something like this will be fine
EFI pump
At this price no point in using a second hand one.
Just drop it by the tank or engine as low as possible if not running a swirl pot.
Cheers Mark
[Edited on 31/12/08 by mark chandler]
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cd.thomson
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| posted on 2/1/09 at 12:24 PM |
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Brilliant guys, thats exactly what I needed.
I think I'll go for the swirl pot system as I'm trying to go highspec and it seems to be something thats fitted quite commonly in
performance applications.
Many thanks.
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cd.thomson
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| posted on 2/1/09 at 02:49 PM |
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as far as low and high pressure fuel pumps go, what psi should I be looking for? I presume the one linked above is high pressure.
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