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  1. #1
    Waterlogged2's Avatar
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    RXPX Stock Speed

    Trying to get a base map for my 08 RXPX before I put the Riva Stage I kit in. Just rebuilt the supercharger at 100hrs. Going to be rechecking the slip on it when my dial gauge arrives Monday. Running 8020 rpm, only getting 64.6 mph GPS. I haven't looked at the wear ring yet but may replace any way. I do have the 3" Riva intake on it now. My question is what speed should I be getting stock and where else can I look for speed lose...intake grate is clear...smooth hull and ride plate holes are not filled....yet. Temp 20C lake temp 21C right now....Thanks


  2. #2
    WBoulton's Avatar
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    Quote Originally Posted by Waterlogged2 View Post
    Trying to get a base map for my 08 RXPX before I put the Riva Stage I kit in. Just rebuilt the supercharger at 100hrs. Going to be rechecking the slip on it when my dial gauge arrives Monday. Running 8020 rpm, only getting 64.6 mph GPS. I haven't looked at the wear ring yet but may replace any way. I do have the 3" Riva intake on it now. My question is what speed should I be getting stock and where else can I look for speed lose...intake grate is clear...smooth hull and ride plate holes are not filled....yet. Temp 20C lake temp 21C right now....Thanks
    prop and wear ring most likely. I think they're suppose to run 68 stock so your missing 4 mph

  3. #3
    shrabber's Avatar
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    with a stage 1 your over 70 64 is slower than bone stock 67mph to 68 mph

  4. #4
    boostedpgt's Avatar
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    that is a tad slow for the water being that cool. i just went 65.3 with a completely full tank of gas and 95f water and air temp. went up to 67.6 when the low fuel warning kicked on. being on how you have over 100 hours on it, wear ring is prob just worn.

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