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Thread: Timing point
          
   
   

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  1. #1
    Krebskolonie is offline CHR Member Visit my Photo Gallery
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    Sargans
    Car Year, Make, Model: 72 Ford T-Bird
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    Timing point

     



    Hi!
    I am searching now a good timing point for my Ford 460cui. The engine is no longer original. The problem is, with the TP from Ford, the engine is going to be too hot. These are the changed parts:

    cam: Adv. Duration: 288°/292° Lift: .522''/.530'' RPM Range: 2500-5500
    (Saturday Night Special from Crane cams)
    heads: Coumbusion Chamber Volume:75cc
    pistons: flat top pistons
    intake: Edelbrock performer
    carburetor: Holley 700 cfm
    copression: ca. 1:10.4
    distributor: electronic

    I hope someone can help me to find the right point. If you need more informations, tell me.

  2. #2
    techinspector1's Avatar
    techinspector1 is offline CHR Member Visit my Photo Gallery
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    Car Year, Make, Model: '32 Henway
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    I must be a little slow this morning. What is "TP"?
    PLANET EARTH, INSANE ASYLUM FOR THE UNIVERSE.

  3. #3
    kitz's Avatar
    kitz is offline CHR Member Visit my Photo Gallery
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    Car Year, Make, Model: 32 Roadster, BBC
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    I think TP is Timing Point.

    I think it should be something like 10-12 btdc at 800 rpm or so with 38 btdc all in by 3,000 rpm ...................

    Be careful though, I'm a Chevy guy. I'm sure someone will be along with hard numbers.

    Kitz
    Jon Kitzmiller, MSME, PhD EE, 32 Ford Hiboy Roadster, Cornhusker frame, Heidts IFS/IRS, 3.50 Posi, Lone Star body, Lone Star/Kitz internal frame, ZZ502/550, TH400

  4. #4
    Krebskolonie is offline CHR Member Visit my Photo Gallery
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    ok, i try it. Thank you!

  5. #5
    Paul Kane's Avatar
    Paul Kane is offline CHR Member Visit my Photo Gallery
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    Car Year, Make, Model: Southwind Jet Boat & Dimarco Hydro
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    Cool

     



    Quote Originally Posted by Krebskolonie
    Hi!
    I am searching now a good timing point for my Ford 460cui. These are the changed parts:

    cam: Adv. Duration: 288°/292° Lift: .522''/.530'' RPM Range: 2500-5500
    (Saturday Night Special from Crane cams)
    heads: Coumbusion Chamber Volume:75cc
    pistons: flat top pistons
    intake: Edelbrock performer
    carburetor: Holley 700 cfm
    copression: ca. 1:10.4
    distributor: electronic

    I hope someone can help me to find the right point. If you need more informations, tell me.
    If you have a 0.030 overbored 466 with flat tops and 75 cc heads, then you are well over 11:3 compression ratio. Standard bore would be closer to 11:1.

    Assuming pump gas as a fuel, I would suggest 32* BTDC @ 3000 rpm. Any more timing that and you risk melting pistons without first doing spark plug readings and adjusting timking & jetting accordingly...it's not likely you'll need much more timing than that anyway.

    Paul

    429/460 Engine Fanatic

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