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Thread: Which impeller?

  1. #1

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    Which impeller?

    I have an 07 RXT with complete stage 1. It is running the 14/17R impeller. I am about to put on 42lb injectors and an xcharger. Am I ok running the 14/17R or should I go with a different impeller? I am seeing 7700-7800 RPM in this Georgia heat running the 14/17R.


  2. #2
    Focker Foggy's Avatar
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    You will need a "little" more pitch with the added boost and fuel.
    Let me check what I have here. I think I have a 13/18.5 and 13/19.
    You can PM me if interested ( and I will pull them out)

  3. #3

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    PM sent

  4. #4

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    We are at stage 2+. We are going to try a 13/19R. I have a 15/20 too much and a 14/18.5 too small. don't have an xcharger but do have xs, 42s, gen2 wheel,Riva water box,OPAS block offs LM2 and Rude Controller. Soon to be watching Gus13letter's RTX smoking me. That's OK because I will be able too reverse engineer Gus's work. This is on an 06 RTX

  5. #5

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    Should I look at the 14/19 instead of 13/19?

  6. #6

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    Our 13/19 will be here Wednesday we should have it tested by Friday and will post then. I would post sooner but we are off to Alabama to pick up a smoking 06 RXT 81+

  7. #7

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    Anyone one else have any advice on which impeller to run with?:

    2007 RXT
    Riva Stage 1
    42lb injectors
    X-charger

    Looking for a good holeshot as well as overall top end speed. Currently running 14/17R with stock injectors and stock 215 SC.

  8. #8
    If it was me..........x charger and 42's.....no exIC?...curious...anyway....14/19R....probably have to add a bit to it too. However...when you do add the external IC...you will need to up the prop....again.

  9. #9
    pass1's Avatar
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    I have a similar setup
    gtx 215hp
    x-charger
    42# injectors
    4'' fizzle intake
    15/20r with speedfreeks set back mod

    IMO I would go with a 15/20r and depitch a bit cause sooner or later you will want to add more goodies you will need a bigger prop, so my advice is to go big now.

  10. #10

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    For now can I just use the 14/17R and later upgrade to a higher pitch?

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