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Thread: 42# Injectors??

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    Biggsw784's Avatar
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    42# Injectors??

    I bought a set of 42# injectors for my 04 RXP with the intentions of putting a x charger on it. I already have riva power filter intake, riva free flow exhaust and fizzle external intercooler sitting in my closet. I was going to install it all this winter once I bought the charger but I recently bought a x charger with the engine tech 137 wheel on already. My question is will my 42# injecters work or should I go ahead with 48# and a rrfpr?? Thanks for any input.


  2. #2
    !!!! wave jumper !!!! 05_RXP's Avatar
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    The 42s will work but you will need a wideband to monitor your afrs and a rising rate to adjust your fuel pressure. Do a search there are a lot of info on that setup

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    ATNryan's Avatar
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    Quote Originally Posted by Biggsw784 View Post
    I bought a set of 42# injectors for my 04 RXP with the intentions of putting a x charger on it. I already have riva power filter intake, riva free flow exhaust and fizzle external intercooler sitting in my closet. I was going to install it all this winter once I bought the charger but I recently bought a x charger with the engine tech 137 wheel on already. My question is will my 42# injecters work or should I go ahead with 48# and a rrfpr?? Thanks for any input.
    In the store description it recommends that you use 48's and a RRFPR. Some others might be running 42's with success tho. I'm sure they will chime in. All I know is that it will be like having a whole new ski next year tho!

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    Biggsw784's Avatar
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    Yea I read in there about the rrfpr and the 48# injectors but wasn't sure if anyone had any experience with this wheel. I try to search about it but didn't really come up with anything. Thanks

  5. #5
    !!!! wave jumper !!!! 05_RXP's Avatar
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    A lot of people on here run that wheel. I run that same set up. Et 137 fizzle external i/c and bosch 42s itdefinately runs a lot cleaner with my 42s then with bosch 48

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    skigolfnut's Avatar
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    I run the bosh 42s with my ET-137 wheel and it works perfectly, I have the RRFPR and a Afr gauge and the Rotax racing ECU, the bosh 42s keep up very well with the demand,
    any other brand of injectors would not work,
    you have to monitor your afr's to be safe,

  7. #7
    Avi8tor's Avatar
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    I do not know, but asking.... Wouldn't 42s and autotune rock in this setup?

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    Biggsw784's Avatar
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    Thanks for the info guys!! What have you guys been doing for RRFPR?? Have you been putting your own kits together or buying kit they offer in the store for $385??

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    Biggsw784's Avatar
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    The 42# injectors I have are Delphis. Will these work or do I need some boschs??

  10. #10
    skigolfnut's Avatar
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    no Delphi's, go bosh or nothing,
    the RRFPR is a little pain, you buy the tank connection $99.00, you buy the e-bay fuel regulator $45.00
    then you have hoses and fittings and a decent glycerin filled gauge it cost around $175.00 to do it your self,
    http://www.ebay.com/itm/Universal-Bl...ht_5351wt_1111
    I went with the do it yourself route and it has been good,
    http://www.ebay.com/itm/Torx-Racing-...7be8ca&vxp=mtr
    you have to monitor AFR's--repeat you have to monitor your AFR's

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