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Fuel Pressure

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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?

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  • Author

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

  • Author

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

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  • Author

thanks for the pics man those are always the most helpful

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

  • Author

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

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

  • Owner

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.
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    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.

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

    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).

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

    Oopppps! Sorry!:doh: 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?:shrug: Dave
    • Owner

    Oopppps! Sorry!:doh: 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?:shrug: 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?

    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
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