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  1. #1

    Repitching 14/19R after installing RXP X Supercharger

    I am planning on buying an rxp x supercharger and installing it on a 2005 RXP with 50# injectors. The RXP currently has the Riva Stage I setup. Will I need to buy a 15/20R or repitch the current solas 14/19R?


  2. #2
    enforcer's Avatar
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    I'd go 15/20

  3. #3
    Yea, I was afraid someone would suggest that... More money, more money.

  4. #4
    Enforcer, I just noticed you are running 42# injectors with an X charger, is that ok? Whats speeds are you getting with that setup?

  5. #5
    enforcer's Avatar
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    Quote Originally Posted by JeremyChe View Post
    Enforcer, I just noticed you are running 42# injectors with an X charger, is that ok? Whats speeds are you getting with that setup?

    it is o.k. to run above 70 degrees.......any cooler and u might want to run an RRFPR. As far as speed u should be around the 74-75 mark.

  6. #6
    blowbyu's Avatar
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    Quote Originally Posted by enforcer View Post
    I'd go 15/20
    +1

  7. #7
    I think 50's are too much. X's run 42's right? I think you will be too rich. And when I did that setup with my 04, it screamed and my 15/20 was not enough in the cool weather. Might be ok in the heat, but you need a 15/21 in the cool. I did anyway.

  8. #8
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    Ok yes the 15/20 is what ur gonna need I needed it on a 07 RXT with a X charger and was right at the 8000 mark in the summer heat, now on to the injectors u will need to use the 42's if ur not gonna run an aftermarket intercooler and u will be fine in almost any weather, I ran the X charger, 42's, 4" rear air, and was fine all year.

  9. #9
    The 15/20 might be ok for an RXT, but he has an RXP. I can just say it wasn't enough prop on mine with that setup. Could try it and have it re-pitched if necessary.

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