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  1. #1
    Jug Inspector
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    OP-R ride plate makes ski feel "heavy"?

    1995 SL750 Stock engine, OP-R (racing?) ride plate and DG Scoop grate (basically a big hole that fits in where the intake grate hoes).

    I bought the rideplate used, and it's in excellent condition. The last time I was out was the first time I rode it with the new plate. The ski felt very heavy in the water, and drastically changed the handling characteristics of it. It did reduce a lot of porpoising, but not completely. My friend rode it and it seemed to be almost non-existent. Could it be because i'm a little on the heavier side? I'm 6'4" and weigh around 245 and I've noticed that my body position does change how much is does porpoise. Also, according to the speedo I've lost about 5mph since I changed the plate. I used to get it into the low 50's (52.5 was the fastest I saw at one point), now on a smooth river the fastest I had it at was 48.5 or so. Was the pump possibly shooting the water past the speedo pickup thing when I was porpoising and that wasn't my true speed? I mean with the location of the pick-up the speedo really is only telling you the speed of the water going through the pump, not necessarily how fast the ski is going. Knowing that the digital MFD speed is a little... ambitious.. I don't really care about the actual speed, just the difference. What I want to know is:

    1. Should I lost that much speed with the OP plate?
    2. Should the ski be rock-solid and not porpoise at all anymore?
    3. Should the ski now feel like it's dragging it's back end so much?
    4. Is my intake grate a piece of shyte and I should ditch it for at least the stock one, if not an R&D (I believe Al has mentioned that this is his favorite combo)

    Thanks guys,

    Bryan


  2. #2
    SeaLion's Avatar
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    An extended pump is a great match for the OP plate. Your 750 has the short pump and with the extended OP it is really flattening it out. I doubt you lost much speed. Have you played with different trim settings?

  3. #3
    Bing-A-Ding-Ding-Ding, Brrrrrap! Brrrrrrrrrap!!! Polaris_Nut#1's Avatar
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    The op ride plate will scrub some speed but that seems like alot. In smooth water I run an old Twist ride plate, but they don't make them anymore. A stock SLX rideplate might bring your speed back up. If you ride rough waters the op is the way to go. I won't run anything but a R&D intake grate no matter the conditions. It's the best.

  4. #4
    Bing-A-Ding-Ding-Ding, Brrrrrap! Brrrrrrrrrap!!! Polaris_Nut#1's Avatar
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    You need a pump wedge, I'd go with a 6 degree given your size. The extended pump will make a big difference and stop the porpoising almost completely

  5. #5
    SeaLion's Avatar
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    A 6* wedge on the short pump will produce a huge rooster tail trimmed all the way up. I had it on my 95 SL750 before I went to the extended pump. Pretty wild when you see it!

  6. #6
    Quote Originally Posted by SeaLion
    A 6* wedge on the short pump will produce a huge rooster tail trimmed all the way up. I had it on my 95 SL750 before I went to the extended pump. Pretty wild when you see it!

    I like that idea!!

  7. #7
    SeaLion's Avatar
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    Easily a 40 footer behind you.

  8. #8
    Hydrotoys's Avatar
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    I'd take the grate off and put the stock one on for some back/back testing. Best to do it at the lake if possible. I wouldn't be surprised if you are stuffing the pump.

  9. #9
    SeaLion's Avatar
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    That DG grate is just a 2 bar open grate and not a top loader style.

  10. #10
    Jug Inspector
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    Quote Originally Posted by SeaLion
    That DG grate is just a 2 bar open grate and not a top loader style.
    Exactly... that's why I said it's just a "hole"... lol.

    And Hydro - What do you mean "stuffing the pump"? As in it can no longer jet the water out like it's supposed to?

    SeaLiion- Yes, I have played with the trim. It doesn't do as much as it used to before the new plate. When I trim it all the way down to almost completely get rid of the porpoising the thing is a complete DOG!

    Who has a 6* wedge?

    -Bryan

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