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2006 Yamaha Apex with MPI Supercharger

Discussion in '4 Stroke Turbos/Supercharger' started by CRH07, Nov 28, 2015.

  1. CRH07

    CRH07 Newbie

    Messages:
    5
    Location:
    Minnesota
    Country:
    USA
    Snowmobile:
    2006 Yamaha Apex
    Last week I purchased a 2006 Yamaha Apex with an MPI Supercharger. The seller told me I am able to run a 91 octane pump fuel but when looking online I'm noticing the options are either 100% race fuel or a 50/50 mixture unless dialed down to a certain PSI. Does anyone know what it should be set at to run on premium pump gas at aprox. 900 ft elevation? The supercharger was obviously installed by the previous owner so proper tuning is not something I have any experience doing. Previous owner purchased it with 1200 miles, it now has 1829 (he was the one who put on the supercharger) so all supercharger parts have minimal usage. Any advise would be greatly appreciated. Thanks!!

    IMG_0505.jpg IMG_0503.JPG IMG_0504.jpg IMG_0506.jpg
     
  2.  
  3. MrSled

    MrSled Administrator Staff Member Admin Moderator VIP Member

    Messages:
    17,117
    Location:
    Schofield, WI
    Country:
    USA
    Snowmobile:
    2017 Sidewinder
    How much boost is it running?? Had it had any head gasket work or low compression pistons?
     
  4. CRH07

    CRH07 Newbie

    Messages:
    5
    Location:
    Minnesota
    Country:
    USA
    Snowmobile:
    2006 Yamaha Apex
    Haven't taken it out yet, previous owner was saying 7-8lbs. At a higher elevation though, it had the full MPI supercharger kit installed. So whatever was included in that kit was installed.. Wasn't really given a whole lot of details I just didn't think it would be so difficult..
     
  5. MrSled

    MrSled Administrator Staff Member Admin Moderator VIP Member

    Messages:
    17,117
    Location:
    Schofield, WI
    Country:
    USA
    Snowmobile:
    2017 Sidewinder
    I would run race gas mix unless its 6lbs or under.. I have blown a head gasket at 8lbs on high octane.
     
  6. CRH07

    CRH07 Newbie

    Messages:
    5
    Location:
    Minnesota
    Country:
    USA
    Snowmobile:
    2006 Yamaha Apex
    Okay, I will lower it down a lot. Don't care to much about the power, just want it to start up and go.. Thanks!
     
  7. machzed

    machzed Extreme

    Messages:
    94
    Location:
    Wisconsin
    Count the teeth on the pulleys top and bottom and I can tell you what boost it will run.
     
  8. ersky

    ersky Extreme

    Messages:
    105
    Location:
    ont canada
    Country:
    Canada
    Snowmobile:
    06 apex gt s/c (sold) 04 rx warrior apex converted 2 stage bender turbo. 12 venture gt (getting old)converted to 11 apex
    building a custom apex
    I put 1 on a 06 switched the pulleys to lower the boost 8000 miles no issues
     
  9. justin gallant

    justin gallant Pro

    Messages:
    194
    Location:
    moncton
    Country:
    Canada
    Snowmobile:
    2006 apex GT
    LOCATION:
    moncton new-brunswick
    What will 6 lbs run you at for hp? 220???
     
  10. MrSled

    MrSled Administrator Staff Member Admin Moderator VIP Member

    Messages:
    17,117
    Location:
    Schofield, WI
    Country:
    USA
    Snowmobile:
    2017 Sidewinder
    More like 200 , you will loose power to make power on a Supercharger.
     
    scuba335 likes this.
  11. justin gallant

    justin gallant Pro

    Messages:
    194
    Location:
    moncton
    Country:
    Canada
    Snowmobile:
    2006 apex GT
    LOCATION:
    moncton new-brunswick
    You have one on the apex of yours don't you? Think iv seen a video of it on YouTube??
     
  12. MrSled

    MrSled Administrator Staff Member Admin Moderator VIP Member

    Messages:
    17,117
    Location:
    Schofield, WI
    Country:
    USA
    Snowmobile:
    2017 Sidewinder
    I do, I have 10 to 12 lbs with a head shim and it only makes like 212hp on the track Dyno at Ulmers.
     
  13. justin gallant

    justin gallant Pro

    Messages:
    194
    Location:
    moncton
    Country:
    Canada
    Snowmobile:
    2006 apex GT
    LOCATION:
    moncton new-brunswick
    Still faster than a winder
     
  14. MrSled

    MrSled Administrator Staff Member Admin Moderator VIP Member

    Messages:
    17,117
    Location:
    Schofield, WI
    Country:
    USA
    Snowmobile:
    2017 Sidewinder
    I dont think so.. I have never raced them..
     
    slowride06er and justin gallant like this.
  15. ersky

    ersky Extreme

    Messages:
    105
    Location:
    ont canada
    Country:
    Canada
    Snowmobile:
    06 apex gt s/c (sold) 04 rx warrior apex converted 2 stage bender turbo. 12 venture gt (getting old)converted to 11 apex
    building a custom apex
    at 6 lbs faster then a sidewinder I sold my sled to my buddy his brother had a sidewinder beat it no problem
     
  16. MrSled

    MrSled Administrator Staff Member Admin Moderator VIP Member

    Messages:
    17,117
    Location:
    Schofield, WI
    Country:
    USA
    Snowmobile:
    2017 Sidewinder
    I can believe that, stock Winders are not all that fast.
     

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