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How many fuel pumps on single turbo?


Gaz6002

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As above really. How many fuel pumps do you run with your setup and why? Also, which brand/model are you using?

 

I'm having issues with my twin Walboro setup and am considering reverting to a single one again or maybe a different make (Bosch 044?) for simplicities sake.

 

What are peoples thoughts?

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This is a summary of my fuel set up:

 

-8an lines

Fuel cell modification

2 x Walbro fuel pump

Aeromotive FPR

Aeromotive -10 high pressure filter

Relays

Boost Logic fuel rail

880cc injectors

Custom Injector clips

Fuel rail connectors / fittings

-8an pertek fuel lines 19 meters

 

I'm sure Ryan could comment over the efficiency of the setup i.e. injector duty cycles etc etc

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It appears to be wired in incorrectly as the pumps are fighting against each other causing the fuelling to be pretty much uncontrollable. I do have a temp fix for it but am looking at a long term solution to the problem.

 

Do you have relays to up keep the voltage up on the pumps? If you try and tie 2 pumps into the stock wiring of the stock fuel pump it wont know what to do hehe. The Walbros are designed for 12volts of flow if i remember right.

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Do you have relays to up keep the voltage up on the pumps? If you try and tie 2 pumps into the stock wiring of the stock fuel pump it wont know what to do hehe. The Walbros are designed for 12volts of flow if i remember right.

 

It's a PHR fuel kit and all parts were used. The pumps should be getting 12v, not 9v.

 

How did Thor Map it like that then?

 

By putting a temp fix on by bridging the diagnostic port. Thats what I mean, I've got a temp fix but am looking for a better solution.

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By putting a temp fix on by bridging the diagnostic port. Thats what I mean, I've got a temp fix but am looking for a better solution.

 

:blink:

 

I thought they would have fixed that !!

 

I remember it having to be like that when it went to Thor but all it would take is for them to put a Circuit Opening relay that is linked to the STA signal so when the engine is running it activates the relay and turns on the Pumps. You could then just wire a direct feed from the battery.

 

Ask James @ ToyotaGT for a Circuit Opening relay and i will sort it out for you one night as that is not Safe matey.

 

Ryan

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:blink:

 

I thought they would have fixed that !!

 

I remember it having to be like that when it went to Thor but all it would take is for them to put a Circuit Opening relay that is linked to the STA signal so when the engine is running it activates the relay and turns on the Pumps. You could then just wire a direct feed from the battery.

 

Ask James @ ToyotaGT for a Circuit Opening relay and i will sort it out for you one night as that is not Safe matey.

 

Ryan

 

It's cool mate, the car is off the road right now anyway until it's properly sorted. We had some other major wiring issues before we got to this point so Thor were mainly looking at those. We have only just realised that this was causing the under-lying fuelling problem and so they can't really be blamed for that.

 

I'll be in touch for some mapping when it's sorted though :)

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wiring pumps is so easy(now mine is done!). Im running 2 walbros. each one has a separate line that goes to each end of a dual feed rail. The pumps are fed by a 12v source through a relay that runs off the original ecu dual volatage setup. Works a treat.

 

Have you got anything in place to detect the failure of one pump?

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