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3SGTE -Does changing the idle timing vary the timing at 7000 rpm ?

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TwoDogs
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2018/06/07 11:23:22 (permalink)
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3SGTE -Does changing the idle timing vary the timing at 7000 rpm ?

Does the ECU vary the ignition timing at 7000rpm based on various sensor information ?
or is it simply a calculation against rpm ?
 
The BGB says idle timing for the SW20 is 10o BTDC, but presumes the engine will boost to 11psi and is using 94 octane fuel (according to KO racing - not sure where they got the info).  I use 98 octane fuel and I'm only getting 8.5 psi currently, so could  use a few more degrees of timing. Easy enough to do, but does +3 degrees at idle mean I will get +3 degrees everywhere ?
 
cheers
Nige 
 
 
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    kojab
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    Re: 3SGTE -Does changing the idle timing vary the timing at 7000 rpm ? 2018/06/07 15:00:26 (permalink)
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    TwoDogs
    Does the ECU vary the ignition timing at 7000rpm based on various sensor information ?
    or is it simply a calculation against rpm ?
     
     

     
    Yes the ECU will vary the ignition timing at 7000rpm based on map sensor/maf sensor readings along with water and air temperature also knock sensor
     
    TwoDogs
    The BGB says idle timing for the SW20 is 10o BTDC, but presumes the engine will boost to 11psi and is using 94 octane fuel (according to KO racing - not sure where they got the info).  I use 98 octane fuel and I'm only getting 8.5 psi currently, so could  use a few more degrees of timing. Easy enough to do, but does +3 degrees at idle mean I will get +3 degrees everywhere ?
     
    cheers
    Nige 



    As a general rule, yes you will get +3 degrees everywhere if it is not set correctly at idle.

    92' SW20 3SGTE   GEN2 GT Hardtop Holden Ls1 ECU
    87' AW11 3SGTE   Delco EFI ECU & 21 psi boost
    71' KE25 3TGTE    Delco EFI ECU Standard engine 24 psi boost
    78' KE55 L67        Delco EFI ECU
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    TwoDogs
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    Re: 3SGTE -Does changing the idle timing vary the timing at 7000 rpm ? 2018/06/07 15:17:56 (permalink)
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    Thanks, Kojab
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