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  1. #1
    Boost-A-Holic's Avatar
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    Riva reduction nozzle Yes/No

    So i was contemplating saving up for a Vtech tunning set up or going ahead and pulling the trigger on a Riva pro series reduction nozzle with the rings. What do yall think?

    My current mods are as follows

    09 RXP

    -Fizzle 4 inch intake
    -Fizzle catch can
    -Fizzle high efficiency IC
    -Bosch #42 Injectors
    -Water strainer kit
    -Riva top loader intake grate
    -Riva Thru hull exhaust
    -Riva SC impeller 9lbs of boost
    -TDR waterbox
    -OPAS removal + block offs
    -Riva 2 degree pump wedge
    -Riva VTS Extension Rod
    -Solas 15/20R
    -Trimmed rear bucket

    73.4 MPH @ 8160

    im up for any recommendations as well if yall have any!

    Thanks,
    Troy


  2. #2
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    Both it's only money

  3. #3
    Got Boost? psycho rxp's Avatar
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    Nozzle is always a good mod to have. U can easily change your RPM's without pitching as much, for changes in weather.

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  5. #4
    A smart admits!A wicked excuses!An idiot insists! mitsakosgt's Avatar
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    Quote Originally Posted by psycho rxp View Post
    Nozzle is always a good mod to have. U can easily change your RPM's without pitching as much, for changes in weather.
    +100

  6. #5
    ADAMBOMB's Avatar
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    I would personally get the tune. Then pitch your prop to where it should be. Then save and get the reduction nozzles for when it gets cold out again. Then you dont have to pitch and repitch for summer and winter. Also I usally see a few good deals on the nozzles in the classifieds in the summer. So keep a eye out.

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  8. #6
    Boost-A-Holic's Avatar
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    what ring would i run if my current RPMs are pretty much spot on? im sittin right at 8160 with an un-touched 15/20. Is it a pretty big improvement as far as acceleration goes or is it more of an extra 1-2 mph top end type mod?

  9. #7
    ADAMBOMB's Avatar
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    Quote Originally Posted by Boost-A-Holic View Post
    what ring would i run if my current RPMs are pretty much spot on? im sittin right at 8160 with an un-touched 15/20. Is it a pretty big improvement as far as acceleration goes or is it more of an extra 1-2 mph top end type mod?
    Do you understand what the ring system does? If your rpms are spot on then you dont need the ring system. its not going to help you at this time. Ive found it best to run a 83mm stock nozzle and pitch your prop to the proper Rpms depending on your ecu.

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  11. #8
    West Texas RXP skoepp's Avatar
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    Adam is correct for the most part.
    With correct rpm with an 83 is best all around.
    Depending on prop obviously, a 84-86 might accelerate hard early but ( want have the top pull like 81-83m. (Assuming all at same rpm. )
    Alot of folks like the 81m.
    I find it to cavitate more and slower out of the hole.

    I like to be pitched for 83 on my RXP.

    I would get the tune.
    Pick up nozzle down the road cheap or get yours bored and buy the rings.

    JM2$.

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  13. #9
    Boost-A-Holic's Avatar
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    Quote Originally Posted by ADAMBOMB View Post
    Quote Originally Posted by Boost-A-Holic View Post
    what ring would i run if my current RPMs are pretty much spot on? im sittin right at 8160 with an un-touched 15/20. Is it a pretty big improvement as far as acceleration goes or is it more of an extra 1-2 mph top end type mod?
    Do you understand what the ring system does? If your rpms are spot on then you dont need the ring system. its not going to help you at this time. Ive found it best to run a 83mm stock nozzle and pitch your prop to the proper Rpms depending on your ecu.

    My RPMs are spot on right now. So don't touch the nozzle just save up for a vtech?

  14. #10
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    Doesn't the reduction nozzle allow you to go to a bigger nozzle ( or is it smaller) in the summertime when the air is not as good as in early spring and fall( heavy, dirty, hot) to get more rpm's.

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