Timing tab

Discussion in 'Engine Topic' started by RICARDO1969, May 7, 2014.

  1. RICARDO1969

    RICARDO1969 Veteran Member Lifetime Gold Member

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    I have a Mr gasket timing tab on a 350 with a 8" balancer.
    I am trying to time this engine currently it is idling at 11 degrees on the tab after tdc seems to idle nice but i want to do total timing but how do i get to 34 degrees if the tab does not read 34? do i need to ditch the Mr gasket tab get a pointer and timing tape?:screwup:
     

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  2. fbody_mike

    fbody_mike Veteran Member

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    Yes, or you can get a dial back timing light.
     
  3. RICARDO1969

    RICARDO1969 Veteran Member Lifetime Gold Member

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    Hmm i only have a reg timing light and a dial back is about 100 bux
     
  4. fbody_mike

    fbody_mike Veteran Member

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    Timing tape works good too, you should be able to use your current bracket with it too. I always make mine out of masking tape.

    Just some math is needed:

    C=2*pi*r, r is 4 for 8 inch balancer
    C= 8*pi = 25.3 in

    C/360degrees = 0.0698 inches per degree

    So for 34 degrees:

    34 degrees * 0.0698 = 2.37" (really close to 2 and 3/8 inches)

    So if you take some masking tape and mark out a line at 0 and another 2.37" away from that and you will have your timing tape. Just line the 0 with the mark on the balancer. The 34 degree line of the tape will line up with the 0 on mr gasket bracket when the timing is at 34 degrees.
     
    Last edited: May 7, 2014
  5. RICARDO1969

    RICARDO1969 Veteran Member Lifetime Gold Member

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    ok i will give it a shot thanks
     
  6. Dogwater

    Dogwater Veteran Member

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    I'm guessing that your balancer isn't numbered that high.
     
  7. RICARDO1969

    RICARDO1969 Veteran Member Lifetime Gold Member

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    it's a stock 350 so no it's not.
     
  8. hhott71

    hhott71 R.I.P 11/19/18 Lifetime Gold Member

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    34* is too little of full advance 36-42* is about right but only actual dragstrip testing for MPH will tell you. You do want to use the least amount of advance that produces the best MPH.

    Measure completely around the balancer (360*) divide that by 9 (40*) or 10 (36*) and mark the balancer with a hacksaw blade. Now unplug the vacuum advance and rev it to 3500 rpm and set the timing to zero (if you marked the 36* mark).
    The setting at idle is what it is.

    Now go to the strip.
     

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