Fuel Pressure

[jwallis]

As you can see in my sig i have a Fass DDRP. i am seeing 16-18 psi idle and 10-13 WOT is this normal?

[Mopar1973Man]

Actually that's not to good... :rolleyes:Here is my Fuel Pressure...

[jwallis]

any suggestions on keeping it higher? i read what you have on the larger diameter plumbing but i have a banjo bolt on the inlet for vp unlike the 90 degree fitting i saw in your pics. ill try and get a pic of mine tomorrow and post it

[Mopar1973Man]

I'm running all 1/2" ID fuel lines...

[jwallis]

would vulcan big line kit work with my edge that plugs in on the test port of inlet side

[jwallis]

and do you run 1/2" inlet and return?

[Mopar1973Man]

1/2" supply and stock return... VP44 is to the right the stock filter is to the left...

AirDog 150 mounted behind the transfer case... All 1/2" lines...

Stock Banjo vs. 1/2" JIC Fittings...

[jwallis]

thanks for the pics man those are always the most helpful

[dripley]

just a thought here. is the DDRP capable of any more pressure or flow than what he is getting now even with bigger plumbing?

[jwallis]

what other way could you get more psi? unless i got a more GPH lift pump right?

[dripley]

thats what i am thinking, but i would feel better if someone with a little more knowledge of the DDRP to chime in here.

[jwallis]

me too. but it does seem to be the only way

[Mopar1973Man]

thats what i am thinking, but i would feel better if someone with a little more knowledge of the DDRP to chime in here.

DDRP has a few issues... 1. The older pump is only 40 GPH the newer pump is 80 GPH. 2. Still mounted on the side of the engine and too far from the fuel tank. 3. Still using the stock 6mm ID fuel line which is too small for volume requirement. So to resolve this issues you would have to contact Eric at VulcanPerformance and get a Big Line Kit and relocate the DDRP back near the fuel tank. This would solve the problems above... 2. Now be closer to the fuel tank. 3. Now would have 1/2" fuel lines for better volume of supply.

[ISX]

My question is, what is the most GPH you ever see? I know the airdog is doing whatever rate but how much does the engine need? I know you guys have to be watching the GPH on your scangauge contraptions while you floor it, if anyone would like to share what they saw and the chip setting (since obviously an edge on level 5 is gonna be even more than stock) then I would be very interested in hearing it.

[Dave3500]

GPH? good question, we only measure FP w a gauge.

[ISX]

GPH? good question, we only measure FP w a gauge.

That's why I said those with a scangauge.. those show gph (gallon per hour).

[Mopar1973Man]

I've seen around 20-22 GPH on a WOT run with trailer in tow.

[Dave3500]

That's why I said those with a scangauge.. those show gph (gallon per hour).

Oopppps! Sorry! One question about the SGII, On my scan gauge it used to give me my MPG read out, but after I started using it in my DD gasser it doesn't display it now. What should I be doing? Dave

[Mopar1973Man]

Oopppps! Sorry! One question about the SGII, On my scan gauge it used to give me my MPG read out, but after I started using it in my DD gasser it doesn't display it now. What should I be doing? Dave

Did you set the fuel type to Gas? or Diesel? Did you Set the displacement to match you other vehicle? Did you set the fillup Offset for this vehicle? Like mine is 24% offset and Mom's 96 Gasser is a 233% offset. Did you set the tank size?

[Dave3500]

Did you set the fuel type to Gas? or Diesel?

I did not know of this option. It recognized it before I went to the gasser. I will check that out.

Did you Set the displacement to match you other vehicle?

Yes I did but I did reset it back to match my CDT.

Did you set the fillup Offset for this vehicle? Like mine is 24% offset and Mom's 96 Gasser is a 233% offset. Did you set the tank size?

Thanks, Dave