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  1. #1
    Chrisx88's Avatar
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    Is there more to gain from xcharger?

    Ive got an 04 rxt build going on (build specs posted in build pages). Ive got the Xcharger and wondering if i would gain anything / more power if i did the 137 +4mm?


  2. #2
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by Chrisx88 View Post
    Ive got an 04 rxt build going on (build specs posted in build pages). Ive got the Xcharger and wondering if i would gain anything / more power if i did the 137 +4mm?
    Yes! Big big gains going with the ET 137+4. Just make sure your running the 42 Bosch injectors and Riva rising rate fuel pressure regulator.

  3. #3
    Chrisx88's Avatar
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    Quote Originally Posted by Green Hulk View Post
    Yes! Big big gains going with the ET 137+4. Just make sure your running the 42 Bosch injectors and Riva rising rate fuel pressure regulator.
    Ive got injectors installed and RRFPR will be orderd shortly.

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    riva told me anything more than a x charger ,i need a programer

  5. #5
    Chrisx88's Avatar
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    Quote Originally Posted by rtarford View Post
    riva told me anything more than a x charger ,i need a programer
    I have a maptunerx

  6. #6

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    Jerry just told me the xx2 on the x charger is fine with the 42 lb injectors and rrfpr

  7. #7
    Chrisx88's Avatar
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    Quote Originally Posted by rtarford View Post
    Jerry just told me the xx2 on the x charger is fine with the 42 lb injectors and rrfpr
    Yea, thats what he said up a few post.

  8. #8
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    I'm running 50lb injectors with that wheel, you run 42s with an x charger

  9. #9
    42's on a x charger and a XX Charger (137+4) will need at least 60 Injectors RRFPR tune and valve train upgrade to name a few things for you motor not to go south

  10. #10
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by AquaticAssault13 View Post
    42's on a x charger and a XX Charger (137+4) will need at least 60 Injectors RRFPR tune and valve train upgrade to name a few things for you motor not to go south
    Just to clarify, on a 2004 ski you can run the XX-2 upgrade with the stock ECU providing you also run the Bosch 42lb injectors and a rising rate fuel pressure regulator... no tune needed although performance is best if you tune it. If tuned, then you'd want 60 lb injectors and supertech valvetrain upgrade.

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