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  1. #1

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    Adding RIVA Air Intake. Need Advise.

    Im adding the RIVA Air Intake to my stock RXP-X. (which is running 69 mph at 8100 rpm).

    My question is this; the air intake should raise rpms to somewhere around 8200, thus banging the limiter. I would need to lower rpms to somewhere around 8050 to 8100 (since its not even hot yet). Would I be better of putting pitch in stock prop? (if so, how much) or running the RIVA reduction nozzle?

    Any advise would be appriciated!


  2. #2
    I hate things that don't work! SearayEX12's Avatar
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    Quote Originally Posted by ba6636 View Post
    Im adding the RIVA Air Intake to my stock RXP-X. (which is running 69 mph at 8100 rpm).

    My question is this; the air intake should raise rpms to somewhere around 8200, thus banging the limiter. I would need to lower rpms to somewhere around 8050 to 8100 (since its not even hot yet). Would I be better of putting pitch in stock prop? (if so, how much) or running the RIVA reduction nozzle?

    Any advise would be appriciated!
    You are kind of in dangerous territory. First off are you putting in a power filter or a rear intake because I don't think the rear intake fits in the RXPX. Secondly it has be said that to reduce the nozzle on the RXPX can cause bucking. I don't really now to much but i'm sure others will chime in.

  3. #3

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    I was going to install the RIVA power filter kit untill the grate and props come in.

  4. #4
    Dr Len's Avatar
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    Your gonna have to go with a 15/22 Pich impeller
    Look at Riva's site.
    http://www.rivayamaha.com/pwc_perf_p...rpm_rxpx_1.asp

  5. #5
    I hate things that don't work! SearayEX12's Avatar
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    If you don't want to wait supposedly there is a prop made by skat trak that will work pretty well with the PX machine. So you could check into that.

  6. #6
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    Quote Originally Posted by SearayEX12 View Post
    You are kind of in dangerous territory. First off are you putting in a power filter or a rear intake because I don't think the rear intake fits in the RXPX. Secondly it has be said that to reduce the nozzle on the RXPX can cause bucking. I don't really now to much but i'm sure others will chime in.
    I attempted to install a custom 4" front... with a 90 degree 3-4 reducer to strait stock to a 90 elbow, then strait 4" to the front

    needless to say, you can't fit strait across because you hit the ic-tb hose and the exhaust hose. Im going to try a 45 degree elbow in there as soon as i get a longer neck on the reducer.

    Right now i have the ss filter mounted with the reducer for a rear set up and even that doesnt fit too well.. it causes some flex on the hoses. gonna give it a shot this week sometime..
    Last edited by ctriverguy; 05-04-2008 at 08:41 PM.

  7. #7
    I hate things that don't work! SearayEX12's Avatar
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    Quote Originally Posted by ctriverguy View Post
    I attempted to install a custom 4" front... with a 90 degree 3-4 reducer to strait stock to a 90 elbow, then strait 4" to the front

    needless to say, you can fit strait across because you hit the sc-ic hose and the exhaust hose. Im going to try a 45 degree elbow in there as soon as i get a longer neck reducer.

    Right now i have the ss filter mounted with the reducer for a rear set up and even that doesnt fit too well.. it causes some flex on the hoses. gonna give it a shot this week sometime..
    I just put on a straight 3 to 4 inch reducer. Then ran the kanaflex up front and removed the front airbox. It seems to fit fine. I picked up well over 200 rpm. I think with the 81mm nozzle I will notice 1 mph gain over stock, but I fell like I need a new prop to really show me what the machine can do.

  8. #8
    ctriverguy's Avatar
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    Quote Originally Posted by SearayEX12 View Post
    I just put on a straight 3 to 4 inch reducer. Then ran the kanaflex up front and removed the front airbox. It seems to fit fine. I picked up well over 200 rpm. I think with the 81mm nozzle I will notice 1 mph gain over stock, but I fell like I need a new prop to really show me what the machine can do.

    yea, i kind of wanted a cleaner look with the aluminum, so I'll tinker with it a lil more before im forced to go kanoflex. glad to see good gains though

  9. #9
    pet's Avatar
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    home made rear air...

    here is my rear air intake.......i just made it tonight
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  10. #10

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    Quote Originally Posted by ctriverguy View Post
    yea, i kind of wanted a cleaner look with the aluminum, so I'll tinker with it a lil more before im forced to go kanoflex. glad to see good gains though
    You need to search for "4 inch metal intake". Lafjax has done exactly what you are after. His pics show exactly what you need.

    Cheers

    Chris.

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