Deatschwerks X3 Fuel system

[Angrey]

Yes having one pump running will definitely keep the heat down and all 3 pumps running at wot will provide you with plenty of fuel. My only concern with that setup is going wot with too little fuel. I probably wouldn't go wot with too much less then a half a tank. For example I have the radium bucket with a much greater capacity fitted with 2 pumps, it works well but anything less then a 1/4 tank of fuel wot it will drop pressure like a rock and go lean. It drains the bucket dry even with the return feeding right back to both pickups. Cruising around I can run it to empty just like the factory set up no issues.

Everyone always thinks the return is a help. It's not. It's just moving fuel in a loop. It contributes nothing to the feed requirements of the pump pickup. Basically, it's a circular logic, if the pump needs 100 liters/hour to send to the rails and it's sending 50 liters/hour back to the tank, that means it needs 150 liters/hour going out the door, 100 of it goes to the motor, the other 50 of it goes back to the tank. So the 50 liters/hour you're putting in the bucket are getting sucked up and wasted in a loop.

Running the return feed outside the bucket definitely hurts (because the pump still needs 150 l/h) but having it in the bucket does nothing to aid full supply to the rails. Essentially, for every drop that's coming from the return, it's also been wasted on the return trip. It's a net neutral flow.

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[GL95]

I remember reading something about that on here a while back.

Yeah the arcane system uses that regulator, I added a check valve to mine and still get it nearly every start

 

[NGOT8R]

Yeah the arcane system uses that regulator, I added a check valve to mine and still get it nearly every start

Got any pics of how you’re plumbed up?

 

[J17GT]

Yeah the arcane system uses that regulator, I added a check valve to mine and still get it nearly every start

Damn. I was planning on adding a check valve to mine in hopes to get rid of the barking seal and make some of the cold starts a little smoother. Oh well, I've gotten used to the seal!

@NGOT8R the X3 kit looks great!

 

[GL95]

Got any pics of how you’re plumbed up?

Standard set up except I have an ethanol sensor plumbed in before the rails on the feed line

 

[LOL WUT]

Damn. I was planning on adding a check valve to mine in hopes to get rid of the barking seal and make some of the cold starts a little smoother. Oh well, I've gotten used to the seal!

@NGOT8R the X3 kit looks great!

Seal lives matter. Let them bark.

 

[NGOT8R]

Interestsd to see if you get the barking seal from your regulator

Do you think a pulse damper on the fuel rail would eliminate this? My Fuel rails came with one.

I also found this on Holley’s website.

Fuel pulse dampers act in tandem with the fuel pressure regulator to further control the fuel pressure in an EFI system. They act to smooth out the pressure pulsations caused by the injectors opening and closing as well as the fuel pump operating. These pulsations happen so quickly that in many cases they can't be identified with an analog gauge but can cause issues with fuel delivery to the engine

 

[Nobuemon]

Do you think a pulse damper on the fuel rail would eliminate this? My Fuel rails came with one.

I also found this on Holley’s website.

Fuel pulse dampers act in tandem with the fuel pressure regulator to further control the fuel pressure in an EFI system. They act to smooth out the pressure pulsations caused by the injectors opening and closing as well as the fuel pump operating. These pulsations happen so quickly that in many cases they can't be identified with an analog gauge but can cause issues with fuel delivery to the engine

Damper came as a 20 years anniversary gift. Glad you asked that question, cause I had no clue what's it for LOL

 

[J17GT]

Do you think a pulse damper on the fuel rail would eliminate this? My Fuel rails came with one.

I also found this on Holley’s website.

Fuel pulse dampers act in tandem with the fuel pressure regulator to further control the fuel pressure in an EFI system. They act to smooth out the pressure pulsations caused by the injectors opening and closing as well as the fuel pump operating. These pulsations happen so quickly that in many cases they can't be identified with an analog gauge but can cause issues with fuel delivery to the engine

Not related. The barking seal is only on initial prime of the fuel system before starting the car.

 

[J17GT]

Here’s a short video clip of the seal barking hello on my car with that DW fuel pressure regulator. A bit high pitched and quieter this time. The bark does seem to change at times depending on what mood the seal is in. No comments on my crooked regulator mounting job please.

 

[GL95]

Do you think a pulse damper on the fuel rail would eliminate this? My Fuel rails came with one.

I also found this on Holley’s website.

Fuel pulse dampers act in tandem with the fuel pressure regulator to further control the fuel pressure in an EFI system. They act to smooth out the pressure pulsations caused by the injectors opening and closing as well as the fuel pump operating. These pulsations happen so quickly that in many cases they can't be identified with an analog gauge but can cause issues with fuel delivery to the engine

No, it may quiet down injector noise some. I believe the barking sound from the regulator is air being purged from the lines, though I never have figured out how air could get in without a leak other than maybe through the return line not being deep enough in the hat

 

[GL95]

Here’s a short video clip of the seal barking hello on my car with that DW fuel pressure regulator. A bit high pitched and quieter this time. The bark does seem to change at times depending on what mood the seal is in. No comments on my crooked regulator mounting job please.

Yeah mine is anywhere from a several second long noise almost like a hydraulic pump turning on, to a quick chirp

 

[NGOT8R]

Is it necessary to delete the sensor in the rear of the fuel rail when running most aftermarket fuel systems? I was wondering if sourcing the proper fittings to allow retention of it would be preferred?

 

[GL95]

Is it necessary to delete the sensor in the rear of the fuel rail when running most aftermarket fuel systems? I was wondering if sourcing the proper fittings to allow retention of it would be preferred?

The fuel pressure sensor? No it screws into the DW rails

 

[NGOT8R]

The fuel pressure sensor? No it screws into the DW rails

Is it relocated to one of the side NPT ports on the rail and if so, did you have to extend the wiring on the factory connector to reach the sensor? I didn’t see where the switch would be integrated into the diagram and was very curious about that.

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