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  1. #1
    Top Dog bandit88's Avatar
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    Help selecting a Advent timing curve

    So I need help selecting a Advent timing curve. I have curveset D7 which includes SXI 22,21,10 and 14. This is on my JS conversion with a PJS Viper 9000 cylinder on a 650 bottom, 800cc. Motor has dual 44s, factory xir pipe (wet), ECWI, and a TBM total loss flywheel. Have been running VP110 in it. I have been using SXI-10 since that is the safest curve but I feel like I should be able to bump it up, but am not sure what would be safe. Motor specs from Newmiller are pictured. Since it is already setup for 110 do I want pump gas curves as anything more will bump it further and require greater than 110, or am I just safe to run pretty much anything at this point? Need some schooling here.

    zA9xGQ7qzd-NlPfeA13cMZ30C_T0jM_6cMP-CswMZzspX92IB?viewBox=712%u00252C949.jpeg
    -95 750SXI
    -86 440 undergoing PJS800 conversion
    -90 TS650

  2. #2
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    Re: Help selecting a Advent timing curve

    your cranking psi is 187 and you're running 110 octane?

  3. #3
    Top Dog bandit88's Avatar
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    Re: Help selecting a Advent timing curve

    -95 750SXI
    -86 440 undergoing PJS800 conversion
    -90 TS650

  4. #4
    Top Dog bandit88's Avatar
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    Re: Help selecting a Advent timing curve

    So this is what Chris told me for this motor:
    -10-15 static for easy starting
    -28-30 by 1500 for low hit
    -start retarding by 5000
    -18-19 at max RPM with 110.

    With that said, it looks like I could use a little more aggressive curve, but I will be going with SXI-22
    -95 750SXI
    -86 440 undergoing PJS800 conversion
    -90 TS650

  5. #5
    Attention ***** PWCToday.com Is My Home Away From Home JonnyX2's Avatar
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    Re: Help selecting a Advent timing curve

    SXi21 is the better and safer curve.
    Quote Originally Posted by Firebird A/C&Heating View Post
    OMG.....Rules for 550 vintage ski class...550 ski riders do not conform to any kind of rules. That is why you are riding a 550 ski in the first place. Rules suck....
    PS...the rule book will be in my 550 pump
    Quote Originally Posted by WB1994
    Listen , stop your cryin' , its only an X2.

  6. #6
    Top Dog bandit88's Avatar
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    Re: Help selecting a Advent timing curve

    Quote Originally Posted by JonnyX2 View Post
    SXi21 is the better and safer curve.
    Hey! you're back!

    What is better about 21 over 22? They look mostly the same except 22 holds more advance at peak RPM, still well below the safe numbers Newmiller gave me for this motor and fuel. Am I missing something?
    -95 750SXI
    -86 440 undergoing PJS800 conversion
    -90 TS650

  7. #7
    PWCToday.com Is My Home Away From Home mcn6's Avatar
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    Re: Help selecting a Advent timing curve

    Looks like the Advent website is no longer... Does anybody have a link to the Advent timing curves? Short of that, how about the individual D7 curve set timing specs??



    Home of Newmiller Machine

  8. #8
    Top Dog bandit88's Avatar
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    Re: Help selecting a Advent timing curve

    Quote Originally Posted by mcn6 View Post
    Looks like the Advent website is no longer... Does anybody have a link to the Advent timing curves? Short of that, how about the individual D7 curve set timing specs??
    Here you go Chris: http://www.adventignitions.com/timin...2.php?engine=1
    -95 750SXI
    -86 440 undergoing PJS800 conversion
    -90 TS650

  9. #9
    PWCToday.com Is My Home Away From Home mcn6's Avatar
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    Re: Help selecting a Advent timing curve

    That is what I was looking for... For whatever reason my old link wasn't working and it didn't come with a google search.

    You could pick any one of the curves in D7 and be totally safe with non O2 110 octane. You could try SXI-22 and if the upper midrange and max rpm feel lazy contact Advent and have your
    unit re-programmed with something including SXR-26 and SXI-19 for 110 octane and maybe SXI-21 or SXI-22 if you ever decide to go back to pump gas.



    Home of Newmiller Machine

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