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  1. #1
    isa alnoaimi's Avatar
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    MOTEC M1 tuning the ignition, need help

    hi everyone

    i have the M1 but i need a little help understanding the ignition table based on throttle position

    i have two ignition tables in one map now that i did myself Click image for larger version. 

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    i need someone to help me understand the ignition and how to tune it safely


  2. #2
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    you're doing the right thing by asking for help here...... be careful, playing with those tables make things go boom!

  3. #3
    MoTeC Pete's Avatar
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    Quote Originally Posted by isa alnoaimi View Post
    hi everyone

    i have the M1 but i need a little help understanding the ignition table based on throttle position

    i have two ignition tables in one map now that i did myself Click image for larger version. 

Name:	timing 1.jpg 
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ID:	339734Click image for larger version. 

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    i need someone to help me understand the ignition and how to tune it safely
    HI
    There are 4 main ign maps in the Yamaha package
    They are split up like this

    Throttle based
    Manifold pressure based
    A&B version of the above

    The A/B thing is so that you can switch between 2 mapped settings
    This means the engine is using either all the A maps or all the B maps
    You need to configure a switch to do this and it is allocated as "Engine Mode"
    Assuming that you havent done this then the engine will be using the A maps
    You can tell when you are on line and you look and see which map is being used, push the space bar to jump to current active site which will take you to the active map.
    So now that you have established that then I would forget about the B maps for now, in fact make them 0 so as to avoid confusion.

    Now back to the other 2 maps
    TP based and MAP based
    Right now your showing us the TP based timing
    Is this thing turbo charged?
    If yes and if not on race fuel then you should be using both the MAP and the TP based
    Or if thats confusing then just use the map based one to start with.

    Here is the thing to remember and is CRITICAL
    The 2 maps (TP based and MAP based) are ADDITIVE
    So if you have 26 degrees in one map and 26 in the other at the same load site that means 52 degrees timing BANG!
    If you look at the base files you will see how I think they should be configured but its up to you of course.

    Cheers

    Pete

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  5. #4
    isa alnoaimi's Avatar
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    pete my ski is turbocharged , and yes i do have the allocated switch already so that i can change from A to B

    thanks bro

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    isa alnoaimi's Avatar
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    Click image for larger version. 

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    yes i do have the A and B tables for the manifold pressure

    so am i on the correct path in the two ignition tables A and B ? when im online with the ECU and if i flip the switch , the yellow arrow is going from mode A to mode B for the ignition table

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  8. #6
    isa alnoaimi's Avatar
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    Click image for larger version. 

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    i have two tables for mode A and B for the manifold pressure

    example : in the TP table the ignition is set at 26 deg at 9000 rpm and throttle is 100% opened , next in the manifold pressure table at 9000 rpm and at 240 KPA the timing is (-6) deg , so the real timing would be : 26 deg from TP table - 6 deg from manifold pressure table would be = 20 deg .

    am i right on this PETE ? waiting for your answer bro so i can rest my mind and go test my ski
    cheers .

  9. #7
    formerly Gold06RXP Turbo Nick's Avatar
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    MOTEC M1 tuning the ignition, need help

    Yes. The TP based table and the MAP table work together to give a final ignition advance. As the boost pressure reaches 10 PSI or so your Map based ignition table pulls timing from the same corresponding value on the TP based table. You can advance your timing by closely monitoring knock activity in the I2 software.

  10. #8
    isa alnoaimi's Avatar
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    hey neck this is the knock levels im having right now , is this safe ? do i have to reduce the timing a little more ?

  11. #9
    formerly Gold06RXP Turbo Nick's Avatar
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    No knocking that I can see there. Are your knock channels being logged at 10hertz or 200 hertz? To be able to see actual knock as it happens it must be logged at 200hertz. 10 hertz dosent give the resolution needed to see knock. If you don't have the upgraded data logging package you can't log more than 10 hertz. To get the 200 hertz needed to accurately monitor knock you have to purchase the upgraded logging

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  13. #10
    isa alnoaimi's Avatar
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    Quote Originally Posted by Turbo Nick View Post
    No knocking that I can see there. Are your knock channels being logged at 10hertz or 200 hertz? To be able to see actual knock as it happens it must be logged at 200hertz. 10 hertz dosent give the resolution needed to see knock. If you don't have the upgraded data logging package you can't log more than 10 hertz. To get the 200 hertz needed to accurately monitor knock you have to purchase the upgraded logging
    nick whats the maximum timing you can go on 91 pump gas boosting 21 psi ? im currently at 26 deg

    i saw seadoo rxp-x 260 ignition map and i was shocked when i saw the ignition table it was 35 deg

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