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  1. #1

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    Will I need more than just a riva ecu

    I have a 2004 RXP with a 68-140 charger on it. I was planning on getting a riva ecu, will I be fine with just that and 50# injectors or will I need more than that


  2. #2
    Eric Ocman's Avatar
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    Quote Originally Posted by HP Solutions View Post
    I have a 2004 RXP with a 68-140 charger on it. I was planning on getting a riva ecu, will I be fine with just that and 50# injectors or will I need more than that
    You will need an RRFPR and possibly a walbro FP to make sure you dont get to lean up top bro. That charger will prob make about 16 or more lbs boost @8600.

  3. #3
    dduck dduck1628's Avatar
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    Don't forget to upgrade the valvetrain.

  4. #4

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    i do have the valvetrain done already, with the RRFPR what do i set it too?

  5. #5
    Eric Ocman's Avatar
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    Quote Originally Posted by HP Solutions View Post
    i do have the valvetrain done already, with the RRFPR what do i set it too?
    Riva Injectors probably 60lbs and Bosch about 57lbs key pressure and this is with boost line attached. These are just guesses given my setup is similiar to yours. To be safe get some AFR gear..

  6. #6
    RXP 260 X Short Course Veteran RXP244's Avatar
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    Quote Originally Posted by Ocman View Post
    Riva Injectors probably 60lbs and Bosch about 57lbs key pressure and this is with boost line attached. These are just guesses given my setup is similiar to yours. To be safe get some AFR gear..
    Totally agree. Fuel pump upgrade also a must. And going this far is no time for guesses. Being able to measure your AFR is also mandatory!

  7. #7
    R88ory RXP's Avatar
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    Quote Originally Posted by RXP244 View Post
    Totally agree. Fuel pump upgrade also a must. And going this far is no time for guesses. Being able to measure your AFR is also mandatory!
    +1 If you wana run big power you have to make sure its all running nice. A 1500cc motor aint gona last too ,ong producing the sort of power we get out of them if its not running good and AF is one of the most important things that needs to be looked at.

    R88

  8. #8

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    The reference line to the rrfpr, do I hook it up to a vacuum source or just boost source. In other words, do I let the vacuum pull down the fuel pressure at idle?

    Is there a fuel pump kit? Or does the walbro fit right in?

  9. #9

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    Also, is my 15/20 prop going to be too much?

  10. #10
    dduck dduck1628's Avatar
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    Quote Originally Posted by HP Solutions View Post
    Also, is my 15/20 prop going to be too much?
    Based on my experience, I would try it 1st. I went from the stock ECU to the RIVA and changed nothing else except for tweaking the fuel pressure for AFR. I was all over the 8650 rev limiter with and untouched 15/22.

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