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  1. #1
    Boost addict hotbird's Avatar
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    If you upgraded to a x charger please share some info. Fuel Pressure?

    I have a 06 RXT that I'm rebuilding the motor on and am installing a x-charger with external intercooler.
    My question is I think I need Bosch 42lb injectors and a rising rate fuel pressure regulator.

    For those of you who already have done this what fuel pressures did you end up running?
    Are you using the rising rate vac/boost hose to the intake? or not?
    Where are your lower rpm fuel ratios at? high rpm ratios?

    I am going to be using a wide band to tune mine in but wanted to know what I will be getting into.

    Thanks!


  2. #2
    Site Admin Green Hulk's Avatar
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    Bosch 42's and the RRFPR will be necessary. Start with 60 psi base pressure and work your way up/down depending on your AFR numbers.

  3. #3
    Boost addict hotbird's Avatar
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    Quote Originally Posted by Green Hulk View Post
    Bosch 42's and the RRFPR will be necessary. Start with 60 psi base pressure and work your way up/down depending on your AFR numbers.
    Would I need to run the vacume/boost hose to the intake for the RRFPR or not?

  4. #4
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by hotbird View Post
    Would I need to run the vacume/boost hose to the intake for the RRFPR or not?
    Yes, it will need to be hooked up as rising rate.

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  6. #5
    HardmanGT's Avatar
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    I would and do. It will pull vacuum at idle to help you being too rich and add fuel up top under boost

  7. #6
    Boost addict hotbird's Avatar
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    what pressures are you setting the fuel at?

  8. #7
    !!!! wave jumper !!!! 05_RXP's Avatar
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    when i put the x and i/c on i had 42s. i hooked my rising rate up so i dint have to have as much base pressure to get wot and gave good afrs down low. i started out at 58 psi i ended up somewhere 52psi but as mentioned every set up is different. so its better to start safe and work your way down.

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