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  1. #1

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    Whats the stock boost pressures and compressor wheel sizes on 185 215 and 255 motors

    Title............


  2. #2
    Moderator beerdart's Avatar
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    6,9,11. 127mm,127mm,137mm.

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    Quote Originally Posted by beerdart View Post
    6,9,11. 127mm,127mm,137mm.
    Thankyou

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    Boost addict hotbird's Avatar
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    185 and 215 oem chargers are much the same.

    The 185 had 1 less tooth on the gear, and I think they did not have clutch gear washers.
    The housing and impeller are the same.

    You can change the gear on a 185 charger and run it on a 215 engine. The flywheels on the motor or different 185 -215

    215 and up have the same flywheel and charger gear. 215 has about 8 psi stock

    255 and 260 use the x charger or a bigger housing and impeller. about 10-11 psi stock

    185 has about 5-6 psi Stock I think.

  5. #5

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    Quote Originally Posted by hotbird View Post
    185 and 215 oem chargers are much the same.

    The 185 had 1 less tooth on the gear, and I think they did not have clutch gear washers.
    The housing and impeller are the same.

    You can change the gear on a 185 charger and run it on a 215 engine. The flywheels on the motor or different 185 -215

    215 and up have the same flywheel and charger gear. 215 has about 8 psi stock

    255 and 260 use the x charger or a bigger housing and impeller. about 10-11 psi stock

    185 has about 5-6 psi Stock I think.
    So if I want to do an RXTX conversion on a 185 the Boost side (just talking supercharger here I know there's other things that need done pistons, etc)....Can I use my stock housing and upgrade the wheel to the X size wheel........I see kits for the 215 to upgrade them to 255 specs.........

    Please don't say just buy a 215 (no offense)........The ski runs perfect I lucked out and got one that was taken care of for a decent price. Id rather use it. I've already got a 215 Gear from a rebuild I did on another 215.....(rebuild kit came with a new gear)

  6. #6

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    you cant put a 255 supercharger impeller wheel in a 215 or 185 housing as they are 127mm and the 255 is 137. you also cant just put the 215 gear on your 185 charger and run it in the 185 as the flywheel doesnt have the right amount of teeth.

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  8. #7

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    Quote Originally Posted by joeytoad83 View Post
    you cant put a 255 supercharger impeller wheel in a 215 or 185 housing as they are 127mm and the 255 is 137. you also cant just put the 215 gear on your 185 charger and run it in the 185 as the flywheel doesnt have the right amount of teeth.
    Sorry wasn't more clear.........Riva has a compressor upgrade for the 215 to go to a 137 that includes the larger intake housing (cheaper than a whole supercharger) but doesn't list the 185 S/C as being compatible with it so the bearing side must be different......

  9. #8
    ncdoo's Avatar
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    A 137 wheel will not work in a 215 bearing housing. You would need to have the housing machined or use a X-charger. Anyway, hows the 70 mph GTX 185 coming.

  10. #9

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    Quote Originally Posted by ncdoo View Post
    A 137 wheel will not work in a 215 bearing housing. You would need to have the housing machined or use a X-charger. Anyway, hows the 70 mph GTX 185 coming.
    Gotta do the homework first brotha.........Wanna be a 185 expert before I start wasting cash on the wrong mods........Bang for the Buck

    If I can't go 255 S/C Without a ridiculous budget then my next thing would be ECU upgrade and get the RPMS up (all the go fast stuff will of course be after better pistons are installed.)

    Know off hand what year RXP/T ECU's would be a drop in (Plus regulator) or is it possible to have the stock ECU reflashed cheaper

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    Boost addict hotbird's Avatar
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    You will be money ahead if you sell the 185 and buy a 215+

    I have been where you are with my first sea doo.

    I ignored this same advice and paid for it. Lol
    But it was fun!

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