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Fuel Setting

Discussion in '4 Stroke Nitrous' started by snowdust, Nov 23, 2015.


  1. snowdust

    snowdust TY 4 Stroke Junkie

    Messages:
    512
    Location:
    Northern Illinois
    Country:
    USA
    Snowmobile:
    Sidewinder
    Just installed a Holtzman kit I bought used from Ulmer. It's a 60 horse shot with a single nozzle facing away from the intake boots. We got a ton of snow from this last storm so I took it out to test. There was way too much snow to get any traction so no chance to dial in clutching. I was able to get the fuel dialed in though. I started at 4 turns out and ended up all the way down to 3/4 of 1 turn out to get to about 11:1 on the AFR. Does this seem right? I couldn't tell much from the nitrous due to lack of traction, but I went through most of the bottle so it is working. Just curious if others are running their fuel screw in that same range.
     
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  3. DIALIN43

    DIALIN43 Lifetime Member Lifetime VIP Member VIP Member

    Messages:
    51
    Location:
    Maple Plain,MN
    Country:
    USA
    Snowmobile:
    2006 apex rtx
    I have the same kit. I run on tar in the summer. I have it set at the same 3/4 to 1 depending on weather A/F runs 11.0 to 11.3
     
  4. snowdust

    snowdust TY 4 Stroke Junkie

    Messages:
    512
    Location:
    Northern Illinois
    Country:
    USA
    Snowmobile:
    Sidewinder
    Thanks for the reply. That makes me feel better.
     
  5. ebockus

    ebockus Pro

    Messages:
    160
    Location:
    peterborough, on
    did u have any issues running it to rich? im thinking of setting it at 2 just to be safe.
     
  6. snowdust

    snowdust TY 4 Stroke Junkie

    Messages:
    512
    Location:
    Northern Illinois
    Country:
    USA
    Snowmobile:
    Sidewinder
    I haven't been able to ride again, but 2 turns out would have been way too rich for mine.
     
  7. ebockus

    ebockus Pro

    Messages:
    160
    Location:
    peterborough, on
    did u experience back firing or huge loss of power being to rich? also are u running polaris wieghts? i think im going to put in 66's. im currently running 62's
     
  8. snowdust

    snowdust TY 4 Stroke Junkie

    Messages:
    512
    Location:
    Northern Illinois
    Country:
    USA
    Snowmobile:
    Sidewinder
    I couldn't tell because the snow was not hard packed. It didn't backfire or anything... It just showed on the AFR gauge. I am running the Heelclicker 2-speed weights and just added a couple grams. Haven't had snow to dial that in yet.
     
  9. slowride06er

    slowride06er Lifetime Member Lifetime VIP Member VIP Member

    Messages:
    470
    Location:
    Ford River MI
    Country:
    USA
    Snowmobile:
    Apex
    Keep us post as you dial it in:nos
     
  10. slowride06er

    slowride06er Lifetime Member Lifetime VIP Member VIP Member

    Messages:
    470
    Location:
    Ford River MI
    Country:
    USA
    Snowmobile:
    Apex

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