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Thread: how much base timing

  1. #1
    Hybrid booster
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    how much base timing

    what the timing people run for our cars when running 15 psi or more or is it stock (just wanna make sure )

  2. #2
    turbo addict
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    Re: how much base timing

    prob depends on which head you have

  3. #3
    turbo addict boost geek's Avatar
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    Re: how much base timing

    I run 16 degrees on a G head at 20 psi.
    later Dick Westerhof

  4. #4
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: how much base timing

    Way too many variables. Best thing is to set it at 12 deg and do a run. If no knock, then advance 2 deg, if go faster with all other stuff being equal, IE 60ft times etc, and no knock, go another 2 deg. Stop when you hear knock or slow down.
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  5. #5
    Hybrid booster
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    Re: how much base timing

    ahhhh


    will advancing it make the egts go up or down is nothing else were to change

  6. #6
    turbo addict
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    Re: how much base timing

    more timing = less EGT

  7. #7
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    Re: how much base timing

    Quote Originally Posted by Mr overkill View Post
    ahhhh


    will advancing it make the egts go up or down is nothing else were to change
    I can never remember this but I believe using theory, advancing the timing will raise EGT's, as I remember when breaking in small block chevy's, you retard the timing to stop the exhaust manifolds from glowing red hot and overheating.
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

  8. #8
    turbo addict
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    Re: how much base timing

    nope read my post, more advanced lowers EGT's, thats why its a balancing act between EGT's and knock. Mostly on lower octane fuels like pump gas. So basically you run the timing till it pings, then back off a little, watch EGT's if there too high you will have to lower the boost cause thats the best you can do on that octane fuel

    thats why a 2 step w/ timing retard will spool in neutral(or clutch in for a 5spd). Retarding the timing moves some of the combustion energy to the exhaust mani to spool the turbo.

  9. #9
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: how much base timing

    Quote Originally Posted by Speedeuphoria View Post
    nope read my post, more advanced lowers EGT's, thats why its a balancing act between EGT's and knock. Mostly on lower octane fuels like pump gas. So basically you run the timing till it pings, then back off a little, watch EGT's if there too high you will have to lower the boost cause thats the best you can do on that octane fuel

    thats why a 2 step w/ timing retard will spool in neutral(or clutch in for a 5spd). Retarding the timing moves some of the combustion energy to the exhaust mani to spool the turbo.

    Thats weird as retarding it for the SBC's lowers the exhaust temps????? but I do realize that retarding the timing starts the process later in the combustion process.
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

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