Fuel Pumps for EFI conversion?

71vert-pga · Aug 18, 2004

Is it necessary that they come from HO vehicles?

What about the pumps in non-HO fords like T-birds, Crown Vics, and Towncars. That is IF they can provide the pressure and volume. I can get those all day long for less than 15 bucks. Don't have any scrapped EFI Mustangs locally.

How about a good inline fuel pump? Any that will work for an EFI conversion that are readily available in most salvage yards?

88 Fox GT · Aug 18, 2004

I am not sure about an inline pump, but I think it's similar to the in-tank pump. They need baffles to keep the fuel flowing to them when the tank is low.

As for using stock pumps from other cars, as long as it can supply the required amount of fuel and pressure, you should be ok. But don't plan on doing any modifications as it will probably not be enough for any mods.

5.0ina66 · Aug 18, 2004

For an an electric fuel pump, go to the junkyard and look at F150s with EFI. These trucks should have a frame rail mounted (inline) electric fuel pump that you can use in a classic car (take the brackets and related items). No 2-pump setup is necessacy.
HTH
-Kyle

PCH_Cruiser · Aug 19, 2004

Any fuel pump on an EFI car should work. Like 5.0 said, the F-150 fuel pumps were external pumps, so they're easiest to install. I found one from a turbo EFI Merkur XR4Ti. Be sure to get the insulated bracket that holds the pump to help keep it quiet. The autoparts store lists the same fuel pump for the F-150's and XR4Ti, and a few other vehicles as well. I tried the autoparts store version, and it was very loud (could hear it over the exhaust up to about 1500 rpm)

Glen's 1965 5.0 · Aug 19, 2004

Some of the Licoln Mark VII had frame mounted pumps also that will work, but you will always have the low fuel slosh problem without some type of baffle system or a header tank.

71vert-pga · Aug 19, 2004

What about an inexpensive source of pumps to feed fuel to the header tank? Whats a good donor vehicle for these?

Booksix · Aug 29, 2004

What about the actual tank? Can the stock tank be used with the new electric pump? What has to be changed?

What about fuel cell options?

Ronstang · Aug 30, 2004

You can go the route I took,

http://pg.photos.yahoo.com/ph/hertzshelby66/album?.dir=/6fdb&.src=ph&.tok=phZDWqBBYlqh1kvG

but not everyone is comfortable with this level of fabrication. There are many options that will work but I chose this one since it is the cleanest and quietest solution in my opinion.

BTW, I can change out the fuel pump with a full tank of gas without laying on the ground in about 15 minutes and use a pump available at any autoparts store anywhere in the country.

Fostang · Aug 30, 2004

Ronstang said:
You can go the route I took,

http://pg.photos.yahoo.com/ph/hertzshelby66/album?.dir=/6fdb&.src=ph&.tok=phZDWqBBYlqh1kvG

but not everyone is comfortable with this level of fabrication. There are many options that will work but I chose this one since it is the cleanest and quietest solution in my opinion.

BTW, I can change out the fuel pump with a full tank of gas without laying on the ground in about 15 minutes and use a pump available at any autoparts store anywhere in the country.

Definatly a cool set up.

I like.

So how much for something like that eh?

66P51GT · Aug 30, 2004

Check out the fuel accumulator from http://www.bcbroncos.com/. It runs about $80 and designed to use a low pressure pump to keep the resevoir full and a high pressure pump to the EFI. It also acs as a filter.

There is also an accumulator made for Porsche 911s for ~$150 that looks up to the job as well. The resevoir is a little smaller and you will have to run an external filter. I'll dig up a link later.

steelhorse · Aug 30, 2004

Ronstang said:
You can go the route I took,

http://pg.photos.yahoo.com/ph/hertzshelby66/album?.dir=/6fdb&.src=ph&.tok=phZDWqBBYlqh1kvG

but not everyone is comfortable with this level of fabrication. There are many options that will work but I chose this one since it is the cleanest and quietest solution in my opinion.

BTW, I can change out the fuel pump with a full tank of gas without laying on the ground in about 15 minutes and use a pump available at any autoparts store anywhere in the country.

You need to look at selling those.......but first you need at least one more test car....and I just happen to have one up in Dallas for you to try

71vert-pga · Aug 30, 2004

66P51GT said:
Check out the fuel accumulator from http://www.bcbroncos.com/. It runs about $80 and designed to use a low pressure pump to keep the resevoir full and a high pressure pump to the EFI. It also acs as a filter.

I sort of like this idea.

Ronstang · Aug 30, 2004

71vert-pga said:
I sort of like this idea.

It is a good idea but I still am not fond of the 2 electric fuel pump idea, both being externally mounted, due to the noise and under carriage clutter issue. I think this is a great solution for those wanting something quick and easy if they are willing to deal with two pumps.

Many years ago when I first designed my system I played around with the idea of an external sump and 2 pumps but I wanted something cleaner and QUIETER but I think this type of solution is much better for most people with fewer tools and less experience in fabricating.

66P51GT · Aug 30, 2004

Here is the unit from a Porsche 911 Turbo. The fitting on the top is for a return line. The two on the bottom is an In/Out after the high pressure EFI fuel pump. This system only uses one fuel pump. Diagrams below.

You can purchase it for $115 here

I found some links regarding the Porsche fuel system. Additional information can be found here: http://www.ncr-pca.org/tech/tech-cis.htm

1. Fuel Tank
2. Fuel Pump
3. Accumulator
4. Fuel Filter
5. Control Pressure Regulator
6. Fuel Distributor
7. Injector
8. Air Sensor Plate
9. Pump Relay
10. Cold Start Valve
11. Thermo Time Switch
12. Warm Up Regulator
13. Auxiliary Air Regulator
14. Throttle Plate
15. Oxygen Sensor
16. Frequency Valve
17. Lambda Control Unit

-Chuck

Ronstang · Aug 30, 2004

Ah, I see....that is sweet using the EFI high pressure pump before the accumulator. That might work with the above filter/accumulator also as it is all a matter of positioning it and plumbing it correctly. If an external pump is acceptable then this setup looks very promising, easy, and relatively cheap.

BUT...THE CAVEAT!!!....it still does not exclude the need for a baffle in the tank to prevent the pump from starvation during turns and low tank situations so this is only part of the solution.

66P51GT · Aug 30, 2004

BUT...THE CAVEAT!!!....it still does not exclude the need for a baffle in the tank to prevent the pump from starvation during turns and low tank situations so this is only part of the solution.

True. There is still risk of a pressure drop if air travels from the tank to the pump (cavitation). I was thinking of it backwards (accumulator before the pump) as in the BC Bronco solution.

The diagram details page does not discuss the design of the Porsche fuel tank. One can only assume baffeling exists. My gut says it does.

Fuel Pumps for EFI conversion?

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