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Thread: initil timing question

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  1. #1
    lit549 is offline CHR Member Visit my Photo Gallery
    Join Date
    Mar 2007

    initil timing question


    hey can anyone here answer a dumb question i should know?? How do i lower my initial timing without effecting total timing?? my total is right where i want it to be @34 deg. i think you do it with springs and weights in distributor, am i right? i have msd streetfire/hei. i think it has regular weights in it but dont know for sure. any help would be appreciated.

  2. #2
    hotroddaddy's Avatar
    hotroddaddy is offline CHR Member Visit my Photo Gallery
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    Aug 2005
    Car Year, Make, Model: 53 Ford Panel truck/59 tbird/73 VW Thing

    I believe the springs are colored, i think gold silver and red

  3. #3
    ceh383's Avatar
    ceh383 is offline CHR Member Visit my Photo Gallery
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    Oct 2004
    Car Year, Make, Model: 51 Chevy pickup 350/350

    I guess it depends on the distributor. The MSD Pro Billet uses springs to control how fast the mechanical advance comes in. It uses a bushing to determine how much advance there will be. All I can find for the Streetfire HEI shows it's changed through the vacuum advance can.
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    Last edited by ceh383; 03-09-2007 at 09:33 PM.

  4. #4
    bentwings's Avatar
    bentwings is offline CHR Member Visit my Photo Gallery
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    Apr 2004
    Car Year, Make, Model: 41 Willys pro street

    ceh383 is right. To reduce initial timing and maintain total advance you have to use a smaller diameter bushing. This allows more travel in the mechanical advance therefore you can use less initial. Sometimes you will have to lengthen the slot where the bushing is. This is best done on a distributor machine. You can do it by removing the dist. and reworking and reinstalling it but it is pretty tedious to do this.
    41 Willys 350 sbc 6-71 blower t350, 9in, 4 link
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