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  1. #1

    Getting ready to build recomend any brands??

    hoping to build a rxp before febuary heres my mods list please comment and critique! need to know what to change before i start spending green!!

    Pirahna engine mounts
    pistons'rings'rods'crank (brand undecided????)
    riva valves
    thru hull exaust riva
    s3 supercharger housing
    ecu riva
    50lb injectors
    umi steering
    pump stock?
    impeller 15/20 r
    stainless ware ring
    rotaxracing intercooler
    ceramic bearing & metal washers
    pro block-offs
    ......... what do you think missing anytihng? thanxs allot for the input!


  2. #2
    hmm-- well u wont need pistons/rods/etc. or 50lb injectors for a S3 supercharger.

    Riva doesnt make valves either.

    What are your goals?? We will be happy to help you out tho!

  3. #3
    Matthew K ReDevilRXP's Avatar
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    Quote Originally Posted by codymouse54321 View Post
    hmm-- well u wont need pistons/rods/etc. or 50lb injectors for a S3 supercharger.

    Riva doesnt make valves either.

    What are your goals?? We will be happy to help you out tho!
    With a Riva ECU you need 50lb Injectors.

  4. #4
    HoopsRXT's Avatar
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    When you say riva valves... Are refering to Riva's valvetrain kit to turn the higher RPMs or are you refering to Lightweight valves?

    Maybe add a low temp thermostat. Looks like you are going try to go stage III. What speeds are you trying to hit?

    Do you have any current modifications?
    Last edited by HoopsRXT; 11-26-2007 at 12:19 PM. Reason: add question

  5. #5
    water here is very very rough.. the engine takes a beating.. a few people here have built s3 waverunneres and now are wishing they did the iternals just so they have no worries at all.. besides im a guy the s3 will only be good enough for so long.. rude charger o rsomething else is sure to be put on it the near future.. lol while the engine is out im just going to do it all on the inside... what valves do you recommend? and where can i get them .. thanx allot for the help i really need it obviously .. lol

  6. #6
    Quote Originally Posted by HoopsRXT View Post
    When you say riva valves... Are refering to Riva's valvetrain kit to turn the higher RPMs or are you refering to Lightweight valves?

    Maybe add a low temp thermostat. Looks like you are going try to go stage III. What speeds are you trying to hit?

    Do you have any current modifications?

    yes that would be the valvetrain kit sorry! what would the low temp hermostat do?? im trying to get 76 in the carribean ( not as easy as it sounds) and my engine is bone stock right now

  7. #7
    In my opinion-- Do not do any internals besides the Riva valvetrain kit. The stock motor is built very well from BRP and will handle 20+lbs of boost.

  8. #8
    Fat Man, Little Boat Region8Ultra250X's Avatar
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    Quote Originally Posted by islandboy View Post
    hoping to build a rxp before febuary heres my mods list please comment and critique! need to know what to change before i start spending green!!

    Pirahna engine mounts
    pistons'rings'rods'crank (brand undecided????)
    riva valves
    thru hull exaust riva
    s3 supercharger housing
    ecu riva
    50lb injectors
    umi steering
    pump stock?
    impeller 15/20 r
    stainless ware ring
    rotaxracing intercooler
    ceramic bearing & metal washers
    pro block-offs
    ......... what do you think missing anytihng? thanxs allot for the input!
    i would do the rude charger in place of the riva S3, do the injectors, with the FMU and rising rate fuel pressure regulator. UMI does nothing other than making the boat more comfortable, no real speed gains. i would do the rotax racing ecu over the riva unit since your warranty won't be chunked with the rotax ecu. and everything else looks good

  9. #9
    Quote Originally Posted by Region8Ultra250X View Post
    i would do the rude charger in place of the riva S3, do the injectors, with the FMU and rising rate fuel pressure regulator. UMI does nothing other than making the boat more comfortable, no real speed gains. i would do the rotax racing ecu over the riva unit since your warranty won't be chunked with the rotax ecu. and everything else looks good

    FMU and rising rate fuel pressure... little more dteail on what that is does and where to purchase please :S hope im not asking to much thanx for the help everyone.... the only reason i wasn't going rude is because there is a 2 hour off shore grewling race that has maybe 10 min of calm water then the chop can get anywhere from 2-11 feet so its taking a beating. i might be wrong but i was told running the 13 lbs boost for that long in that types of conditions it would be unlikly to make it around ??

  10. #10
    HoopsRXT's Avatar
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    Well now that we know what your goal is that helps. A few more questions to help round things out.

    How much are you looking to spend?
    Are you worried about the warrenty?-Riva ECU voids the warrenty

    I am assuming you will be installing or are not concerned about the cost of a dealer installing the parts.

    Don't forget basic mods like;

    Air intake-Help engine breath better
    Riva Intake grate- help with hook up

    Have you read this thread. It very informative.
    http://greenhulk.net/forums/showthread.php?t=16773

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