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  1. #1
    KensGp kenlepack's Avatar
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    riva x charger impellor

    ok so ive searched everywhere for info on this riva x impellor and cant seem to find much at all. I am looking to put this charger which is complete with the riva x wheel in it on my practically stock 04 rxp. the only mods are catch can, custom rear air, free flow, and hole filled. it currently runs a solid 69.8mph gps in cool weather on full tank. i would like to know what injectors to run with this set up on a stock ecu and stock IC. what is best 42s with rrfpr, or 48s without rrfpr? or what do you guys suggest? will i need to put on external IC to run this charger? also which prop would i throw on after, only do lake riding so i am thinking a 15/20 or 15/22? also are there any flaws to this wheel? is it know for breaking bearings or touchdowns like the S3 charger? thanks in advance


  2. #2
    Site Admin Green Hulk's Avatar
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    If you have the Riva X charger upgrade on an X model supercharger you will need the Bosch 42's and a Riva rising rate fuel pressure regulator. The 48's will be way too large for the stock ECU. There are no known flaws to this upgrade.

    If you are going to use the stock intercooler then stick with a 15/20R impeller. I highly recommend you upgrade the intercooler though and in that case you will want to run a 15/22R impeller.

  3. #3
    KensGp kenlepack's Avatar
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    Quote Originally Posted by Green Hulk View Post
    If you have the Riva X charger upgrade on an X model supercharger you will need the Bosch 42's and a Riva rising rate fuel pressure regulator. The 48's will be way too large for the stock ECU. There are no known flaws to this upgrade.

    If you are going to use the stock intercooler then stick with a 15/20R impeller. I highly recommend you upgrade the intercooler though and in that case you will want to run a 15/22R impeller.
    Sounds good. Since I'm gonna go pretty hard into the ski this winter I will probly upgrade the intercooler and get a 15/22r. So I will be putting these mods on pro block offs, pump wedge with rod, 42lbs injectors, rrfpr, x charger with Riva x wheel, external intercooler, new carbon ring, sf bellow, 15/22r, upgraded flywheel bolts, afr gauge, boost gauge. I was wondering if I should put some 08 valves in? I know it recommended but necessary with stock ecu? And if I get the valves must I upgrade the springs retainers as well or can I reuse mine? Am I missing anything for this set up?

  4. #4
    monaroman76's Avatar
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    Yes you should definitely change the valves. You can re-use your valve train. How many hours on your motor?

  5. #5
    KensGp kenlepack's Avatar
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    Quote Originally Posted by monaroman76 View Post
    Yes you should definitely change the valves. You can re-use your valve train. How many hours on your motor?
    101 hours.

  6. #6
    monaroman76's Avatar
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    It might be worthwhile changing the springs if you plan on changing the ECU down the track. Otherwise, you can just re-use your springs

  7. #7
    KensGp kenlepack's Avatar
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    Cool ill invest in some valves.

  8. #8
    Sturm215's Avatar
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    The valves would be the first thing I'd do.

  9. #9
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by Sturm215 View Post
    The valves would be the first thing I'd do.
    +1

    Go with the Ferrea valves. They are the best value as they are 100x better than stock valves and cheaper than an OEM replacement valve set
    http://www.4-tecperformance.com/inde...roducts_id=527

  10. #10
    KensGp kenlepack's Avatar
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    thanks guys, i guess valve job it is, lol i doubt the head gasket is reusable? what gaskets and or bolts do i need while we are on the subject.

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