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  1. #1
    Eric Ocman's Avatar
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    Riva OPEN Loop Cooling temp test results from today.

    I will be doing some back to back tests soon of the Riva Thermo and the Fizzle thermo with a few different combinations.

    Here are my results today.

    PUMP WASHER: Stock
    MAX RPM 8680
    AIR TEMP 86
    WATER TEMP 75
    XS COOLER
    GROCO STRAINER
    OIL COOLING LINES HOOKED UP
    WATER PUMP IMPELLER STILL IN

    water routing pump,strainer,xs,water pump inlet per rivas instructions.

    THe SKI warmed up incredibly fast and eventually settled a 162 (3 Minutes)

    WOT TEMP MAX 167

    One thing I did notice is that after a WOT run the minute you let off the throttle the temp would spike to between 183-189 but within 5 seconds it was right back at 162. Im Assuming this is because of the momentary fluctuation in water flow/pressure across the head from Rapid Deceleration.

    Next time out I will do back to back runs with the riva and fizzle thermos (have 2 thermostats james gave me) and I will also try the bigger washer to see if it makes any difference.


  2. #2
    Mod less, ride more! troyheb's Avatar
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    Good info, since I am going open loop myself.


    Hey, no speed numbers?

  3. #3
    Eric Ocman's Avatar
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    82.4 @8680 Got to have Duke work me up about 400 more rpms
    I dont superman btw. Not that brave

  4. #4
    Mod less, ride more! troyheb's Avatar
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    That thing will be smoking once you get it dailed in. You coming to MB right?

    Your running 9:5.1 pistons now? Could you tell a difference? I could notice a big change in hole shot with mine. Where as before it would break the prop loose once, it now breaks the prop loose 2-3 times from an idle.

  5. #5
    Eric Ocman's Avatar
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    Stock pistons and bottom end. Did swap to 04 cam though. Plan on coming yes

  6. #6
    Mod less, ride more! troyheb's Avatar
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    For some reason I thought you went with higher comp pistons.

    Look fwd to meeting you and seeing that ski run.

  7. #7
    Eric Ocman's Avatar
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    Quote Originally Posted by troyheb View Post
    For some reason I thought you went with higher comp pistons.

    Look fwd to meeting you and seeing that ski run.
    I want to but I have not had any major failure yet to warrant it and my Compression is good @140 135 140.

    All I did over the winter was the following.

    Head Decked
    Full Riva Valvetrain
    Stock Valves lightened
    9.2K Les ECU
    04 Cam swap
    New Headgasket

    I did the Riva Plate right before the Drags.

  8. #8
    dnielsen's Avatar
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    Quote Originally Posted by Ocman View Post
    I will be doing some back to back tests soon of the Riva Thermo and the Fizzle thermo with a few different combinations.

    Here are my results today.

    PUMP WASHER: Stock
    MAX RPM 8680
    AIR TEMP 86
    WATER TEMP 75
    XS COOLER
    GROCO STRAINER
    OIL COOLING LINES HOOKED UP
    WATER PUMP IMPELLER STILL IN

    water routing pump,strainer,xs,water pump inlet per rivas instructions.

    THe SKI warmed up incredibly fast and eventually settled a 162 (3 Minutes)

    WOT TEMP MAX 167

    One thing I did notice is that after a WOT run the minute you let off the throttle the temp would spike to between 183-189 but within 5 seconds it was right back at 162. Im Assuming this is because of the momentary fluctuation in water flow/pressure across the head from Rapid Deceleration.

    Next time out I will do back to back runs with the riva and fizzle thermos (have 2 thermostats james gave me) and I will also try the bigger washer to see if it makes any difference.
    Damn nice write up, will be interisting to see the final results!!!

  9. #9
    Having Fun jp1300r's Avatar
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    Some good information. Thanks, Eric.

  10. #10
    Eric Ocman's Avatar
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    Thanks guys, After some of the posts I have read I expected things to be a bit warmer with the stock riva washer but to my surprise they were not.

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