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  1. #1
    Join Date
    Dec 2006
    Location
    Weyburn,saskatchewan, canada
    Posts
    45

    Default Buick 455 timing

    Hello everyone. Since I am new to using a Buick 455 in a car for drag racing. I was wondering what this motor should be set to for initial timing, what rpm to have it all dialed in by and whether I should use a vacuum advance on as well. It has been converted over to hei from the points distributor (its sitting on the shelf). A friend of mine says to have 4 degrees of initial and have it all dialed in by 2500 but his gs455 still has points distributor. Are there previous threads for this question that I should reference or someone have a better suggestion from experience. Thanx.

  2. #2
    Join Date
    Jan 2005
    Posts
    1,325

    Default

    Do a search for timing, power timing, etc... lots of threads on it. Many things enter into the equation as to what your engine will need for timing. You'll want more initial timing than 4, and limit the mechanical. Vacuum advance is good for a street car during cruise situations, useless on a race only application, since your at WOT and nearly no vacuum during the run. You'll be more interested in your total timing. Get it in as early as your engine and fuel will allow. Anyway do a search and you'll find lots on the subject.
    Dave

    1970 GSX Stage 1 auto (QQ)
    1970 GS455 conv. auto (Red)
    1964 Skylark conv.
    1987 GN
    1970 GS Stage 1 (street/strip) former Car Craft Mag. RSE car. 10.96 @ 124.55 mph, full exhaust, MT ET Street Radials, pump gas.

  3. #3
    Join Date
    Dec 2006
    Location
    Weyburn,saskatchewan, canada
    Posts
    45

    Default

    Thanx. I appreciate it

  4. #4
    Join Date
    Feb 2002
    Location
    Oakland Gardens, N.Y.
    Posts
    20,846

    Default

    Larry
    1998 "Fully Optioned" SC3800 Riviera
    70 GS 455 Stage1, TSP 470, 602 HP@ 5900, 589 TQ @ 4900
    TA Hyd Roller Cam, 230*/238*, 112, .544"/.577" lift, 4-7 swap
    MSD Digital 6+, Ignitionman Distributor w/MSD trigger
    1967 BT Switchpitch ST-400, Gear Vendors OD
    with TSP 3200/1800 converter
    AED 1000 HO Carb, 800 CFM 7042240 Quadrajet
    8.5 10 bolt, 3.73's
    11.67 @ 115.49 MPH
    Larrymta@verizon.net, GSCA #291
    BPG # 1063
    N.E. GS/GN Club Assistant Director

  5. #5
    Join Date
    Dec 2002
    Location
    Clarion, PA
    Posts
    2,202

    Default

    I use an HEI and I have my initial set for 10*. My total timing is 36* which is all in around 2500 rpm. I use my vacuum advance. I limited its travel by drilling an offset hole in a dime and screwing it down so that it contacts the rod. A little trail and error and I got my 36* total.
    BPG #1252
    GSCA #3523
    '70 GS 350
    '71 Skylark 455 (future parts car)
    '86 T-Type (sold)
    '01 Regal GS (blew the tranny and traded it for an SUV)
    '99 Regal GS (its back again)

    I'll be where I am.

  6. #6
    Stage1 Jeff Guest

    Default

    I'm running a MSD pro billet dist, and a 6a box.My initial is 14* total timing is 34*
    all in about 2400-2500 rpm

 

 

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