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  1. #1
    i hate my bipolar disorder its great
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    Seadoo RXP - next step

    Just picked up a 2004 Seadoo Rxp has allready had the following engine mods done

    Seadoo Riva X Model Hi Flow Supercharger
    42lbs injectors
    4” Fizzle Front Mount Air Intake Kit
    Riva Free Flow Exhaust
    Riva Thermostat Kit
    Solas 14/19 Prop

    OPAS Block Offs
    R and D Intake Grate

    ski has around 80 hours on it

    coming from building boosted cars iv got a fair idea of whats going on
    what would be the next logical step, external intercooler? was considering trying to hunt down a rxp-x cooler kit?
    what other major mechanical difference are there between the rxp and rxp-x?

    any help/advice would be great quite new to the whole jetski thing but am loving it!

    thanks.


  2. #2
    monaroman76's Avatar
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    Welcome to the forum fellow Aussie.
    Im not sure what supercharger you are referring to there... I am assuming you mean an OEM X charger.. An external intercooler would be a great next step and add a good 15+ hp. A fizzle intercooler kit from the online store is probably your cheapest and best bet. You will also need to add a RRFPR to fine tune your fueling though.

    The motors are the same, the X just has an external intercooler, a larger charger, and 42# injectors. So you are nearly at X specs now.

    The pumps are also different between the rxp and the rxpx and the x has VTS.

  3. #3
    monaroman76's Avatar
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    Also have a read up on the issues the 2004 models have with exhaust valves. Something to consider...

    It looks like you dont have to worry about the ceramic washers, given you have the X charger, which is a good thing.

  4. #4
    i hate my bipolar disorder its great
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    why would i want a fuel pressure reg? iv always been on the opinion that rising rate regs are a cheapo fix for a inadequate fuel system?
    or does the rxp-x run such reg in which case it would make sense
    also how would you go about setting correct afr's with the reg...

    i have no idea about exhaust valves though whats wrong with them?
    dont want to turn this thing into a pig that brakes down or has loads of issues

    thanks for the advice, much appreciated !

  5. #5
    i hate my bipolar disorder its great
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    also would that prop still be suited too adding an external cooler and reg?
    and what hp/speed would this be good for

  6. #6
    monaroman76's Avatar
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    Quote Originally Posted by cracker View Post
    why would i want a fuel pressure reg? iv always been on the opinion that rising rate regs are a cheapo fix for a inadequate fuel system?
    or does the rxp-x run such reg in which case it would make sense
    also how would you go about setting correct afr's with the reg...

    i have no idea about exhaust valves though whats wrong with them?
    dont want to turn this thing into a pig that brakes down or has loads of issues

    thanks for the advice, much appreciated !
    You'd need a fuel pressue reg so that you could add a little fuel on top, you'd likely be slightly lean.The rxp ECU is mapped for 38's whereas the X ECU is mapped for the 42's, thats why you need the RRFPR. I am not sure on the settings for base pressure with this setup, but they would be easy to find as it is a very common setup. If you are going further with mods, you will have to look at installing an AFR gauge so you can monitor and tune accordingly.

    The exhaust valves were of poor quality up unitl 2006 and many people have dropped valves due to the stems breaking. It might be worth considering upgrading to 06+ spec OEM valves.

  7. #7
    monaroman76's Avatar
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    Quote Originally Posted by cracker View Post
    also would that prop still be suited too adding an external cooler and reg?
    and what hp/speed would this be good for
    I think most run with the 15/20r with the external cooler, or you could repitch yours. My guess is youd be mid 70's with that setup.

  8. #8
    Sayers's Avatar
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    Quote Originally Posted by cracker View Post
    why would i want a fuel pressure reg? iv always been on the opinion that rising rate regs are a cheapo fix for a inadequate fuel system?
    or does the rxp-x run such reg in which case it would make sense
    also how would you go about setting correct afr's with the reg...

    i have no idea about exhaust valves though whats wrong with them?
    dont want to turn this thing into a pig that brakes down or has loads of issues

    thanks for the advice, much appreciated !

    Welcome to the Forum.
    A good mate has a 8 sec rx7, he runs a RRFPR! There not a bad thing and are widely used.
    To set your AFR you need to install an o2 kit. Most are running innovate kits. Look on eBay for innovate MTX-L or the older LC-1 setup.

    Check those valves quick smart! Use the search function, there is a huge amount of old threads on this topic and others you will find very helpful.

  9. #9
    i hate my bipolar disorder its great
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    Quote Originally Posted by Sayers View Post
    Welcome to the Forum.
    A good mate has a 8 sec rx7, he runs a RRFPR! There not a bad thing and are widely used.
    To set your AFR you need to install an o2 kit. Most are running innovate kits. Look on eBay for innovate MTX-L or the older LC-1 setup.

    Check those valves quick smart! Use the search function, there is a huge amount of old threads on this topic and others you will find very helpful.
    thanks for the reply

    the exhaust valves sounds like a massive undertaking... considering i just brought it

    might just leave it alone for now, considering the amount of work required to install a cooler and then adjusting afr's etc

  10. #10
    Sayers's Avatar
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    Quote Originally Posted by cracker View Post
    thanks for the reply

    the exhaust valves sounds like a massive undertaking... considering i just brought it

    might just leave it alone for now, considering the amount of work required to install a cooler and then adjusting afr's etc

    Where's the fun in that???????


    Does the ski have a fogging kit?
    Do you know if the ski was flushed and fogged by the previous owner religiously?
    Was it ridden in mostly salt or fresh water?

    If it has been well looked after the valves might not cause you any issues. When/if they do let go however it can cause some major damage and add up to a much bigger bill than just replacing them before this happens.
    G/L

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