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  1. #1

    Join Date
    Jun 2010
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    Bahrain
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    need advice with 48" injectors

    hi i got Rxp-X with 135 hours with stock fuel pump& stock ECU
    my mod in it is:-
    -2rude
    -48"injectors
    -j pipe (free flow)
    -4 inch air filter
    -Riva Grate
    -83mm nozzle (for stock RXP215)
    -Riva 2-degree wedge
    -reverse bucket
    -Opas removed
    -Solas 15/22R
    -flame arrestor removed
    our weater is too hot the temp alawas around 95f my current RPM is 8040
    this is my spark plag after 20 hour of using 2rude and 48"injectors
    Click image for larger version. 

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    my ski pic
    Click image for larger version. 

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    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  2. #2
    R88ory RXP's Avatar
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    Feb 2008
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    Quote Originally Posted by Arabrxpx View Post
    hi i got Rxp-X with 135 hours with stock fuel pump& stock ECU
    my mod in it is:-
    -2rude
    -48"injectors
    -j pipe (free flow)
    -4 inch air filter
    -Riva Grate
    -83mm nozzle (for stock RXP215)
    -Riva 2-degree wedge
    -reverse bucket
    -Opas removed
    -Solas 15/22R
    -flame arrestor removed
    our weater is too hot the temp alawas around 95f my current RPM is 8040
    this is my spark plag after 20 hour of using 2rude and 48"injectors
    Click image for larger version. 

Name:	IMG00160-20100904-1240.jpg 
Views:	99 
Size:	57.4 KB 
ID:	214442
    my ski pic
    Click image for larger version. 

Name:	08082010019.jpg 
Views:	80 
Size:	75.1 KB 
ID:	214441
    Looking at your plugs youi look rich, but its very hard to tell anything from the plugs in these engines you need a AF gauge to test with really.

    R88

  3. #3
    masta2000's Avatar
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    looks rich, but not too bad, and you are not running hot

  4. #4

    Join Date
    Jun 2010
    Location
    Bahrain
    Posts
    49
    what i do i return the stock injecters 42" and how is my rpm is it good

  5. #5
    dnielsen's Avatar
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    May 2008
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    Shreveport, Louisiana
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    2,018
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    I wouldn't go back to the 42s yet, you need to get AFR monitoring to know for sure. The 42s will most likely cause it to run way lean. You may opt to try a set of the Riva 50s as they will actually flow less fuel than the 48s you have now. You need the Lm1 or Lc1 AFR setup and a RRFPR without the boost line attached so you can fine tune the fuel pressure.

  6. #6
    Eric Ocman's Avatar
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    Compared to mine they dont look to bad. A little rich though.

  7. #7
    speedskixp's Avatar
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    Were those pulled directly after a wot run? I'm guessing those plugs are dark from your rich idle and not wot.

  8. #8
    Quote Originally Posted by speedskixp View Post
    Were those pulled directly after a wot run? I'm guessing those plugs are dark from your rich idle and not wot.
    +1
    The pic is not clear but the ground electrode looks like it was running hot (heat band is close to the threads) and in any case the RXPX/T are so lean from the factory at WOT that 48lb injectors are almost needed stock at WOT.

  9. #9
    Eric Ocman's Avatar
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    Quote Originally Posted by RXP6 View Post
    +1
    The pic is not clear but the ground electrode looks like it was running hot (heat band is close to the threads) and in any case the RXPX/T are so lean from the factory at WOT that 48lb injectors are almost needed stock at WOT.
    my rxpx ran better when I put the 48s in with stock ecu with a rude one.

  10. #10
    Eric Ocman's Avatar
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    Quote Originally Posted by speedskixp View Post
    Were those pulled directly after a wot run? I'm guessing those plugs are dark from your rich idle and not wot.
    Are you and frank talking about his or mine? Lol

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