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Thread: Timing Issue? I wish I could get this thing to stop pinging!
          
   
   

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  1. #1
    gearGrinder's Avatar
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    Timing Issue? I wish I could get this thing to stop pinging!

     



    OK, fixed several problems only to uncover more, now after new plugs and an adjustable vac can my truck PINGS under various conditions.

    I have my initial timing down to 10 degrees and have eliminated all but a few situations, namely hard accelerating out of a turn. Partial and WOT throttle under load (going up hill) no longer ping but if you goose hard it coming out of a turn it will ping, but if you accelerate moderately and build to full throttle it is OK...

    I really wish I could get it back to how it behaved with the *wrong* plugs in regards to not pinging...

    I was thinking about lighter mech adv weights in my dizzy and playing with spring combos and adding vac adv to tune my curve, as it is I am all in around 2000 RPM - and right now my total mechanical advance is 15 degrees

    Any thoughts gentlemen?
    Burning gunpowder and gasoline daily for over 20 years and counting!

  2. #2
    pat mccarthy's Avatar
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    hard for me to think your all in at 2000 with stock springs .if so thats a first for me ? stock springs will not come all in at 2000 no way
    Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip

  3. #3
    gearGrinder's Avatar
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    Quote Originally Posted by pat mccarthy View Post
    hard for me to think your all in at 2000 with stock springs .if so thats a first for me ? stock springs will not come all in at 2000 no way
    Hard for me to believe too but I have the results documented over several tests I've run

    Keep in mind, this is with the vac adv disconnected...
    Burning gunpowder and gasoline daily for over 20 years and counting!

  4. #4
    Mikej's Avatar
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    If your wanting to run 87 octane try restting the fan so you are at 160 deg. again. Also try a cooler plug. Here in the Midwest 91 octane is available most places. 93 octane and you have to know where to get it. So in my opinion 91 octane is pump gas. Also how much vac. advance do you have?
    If it's not broke, fix it anyway.

  5. #5
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    What happens when you spend the extra 10 cents a gallon and buy 89 octane? Does it still ping? Gas is lousy these days and ethanol is even worse. I even run mid grade in my Honda daily because that puts it where it likes to run best.

    What happens when you spring for high test?


    Don

  6. #6
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    Check your float level

  7. #7
    skyeking is offline CHR Member Visit my Photo Gallery
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    Smile can't stop this pinging

     



    Quote Originally Posted by Itoldyouso View Post
    What happens when you spend the extra 10 cents a gallon and buy 89 octane? Does it still ping? Gas is lousy these days and ethanol is even worse. I even run mid grade in my Honda daily because that puts it where it likes to run best.

    What happens when you spring for high test?
    Don
    Itoldyouso: 369568

    Hi People,
    May I suggest that you set everything back to regulation timing etc
    and use a different fuel depot for a few weeks...All the best..Skyeking

  8. #8
    Big Tracks's Avatar
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    This will sound elementary and I sure don't want to insult you, but have you checked your vacuum hoses?

    I has a sort of similar problem and tracking it down gave me fits.

    Jim

  9. #9
    gearGrinder's Avatar
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    Quote Originally Posted by Mikej View Post
    If your wanting to run 87 octane try restting the fan so you are at 160 deg. again. Also try a cooler plug
    How do I determine which plug would be colder, aside from that, any suggestions on WHICH spark plug to run? (vortec head: 14mm tapered thread, 0.75" thread length)

    Also how much vac. advance do you have?
    As of last night I am running a total of 34* advance, 10* initial, 14* mechanical, 10* vacuum adv

    Quote Originally Posted by Itoldyouso View Post
    What happens when you spend the extra 10 cents a gallon and buy 89 octane? Does it still ping? Gas is lousy these days and ethanol is even worse... What happens when you spring for high test?
    Next tank full will be high test, I will post results

    Quote Originally Posted by 53 Willys View Post
    Check your float level
    Will do, just not sure who's data to follow, Carter or Edelbrock...
    - Carter suggests 3/8" float level and 15/16" drop
    - Edelbrock suggests 7/16" float level and 1-1/4" drop

    Quote Originally Posted by skyeking View Post
    May I suggest that you set everything back to regulation timing etc and use a different fuel depot for a few weeks...All the best..Skyeking
    Sage advice, nothing wrong with re-grounding ourselves every once in a while

    I have keep pretty good notes with all the tuning I am doing and every so often I revert things back to a previous point to make sure I get the same old results, so far I do and not extra parts left over either!

    Thanks for replies guys!
    Last edited by gearGrinder; 11-18-2009 at 11:51 AM.
    Burning gunpowder and gasoline daily for over 20 years and counting!

  10. #10
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    Check out this guy call Lars Grimsrud. I have used his articles to tune my 327 with vortec heads and Proform HEI. I replaced the adjustable vac can with a stock vac can he listed (AR31 $9 Auto Zone) and it has tuned my motor very well.
    http://www.corvetteclub.org.uk/files...and_timing.pdf
    http://www.nastyz28.com/~ericf/tech/vacadvance.pdf

  11. #11
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    Quote Originally Posted by 18436572 View Post
    Check out this guy call Lars Grimsrud. I have used his articles to tune my 327 with vortec heads and Proform HEI
    Cool, thanks!
    Burning gunpowder and gasoline daily for over 20 years and counting!

  12. #12
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    A colder plug has the proclean cone that is shorter ( pulled more into the threaded part), bad explaination.
    If it's not broke, fix it anyway.

  13. #13
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    Quote Originally Posted by Mikej View Post
    A colder plug has the proclean cone that is shorter ( pulled more into the threaded part), bad explaination.
    I was looking for a specific, colder plug for my application but thanks for the explanation!

    In the mean time I found a few Champion and Autolite plugs I could try
    Burning gunpowder and gasoline daily for over 20 years and counting!

  14. #14
    BigTruckDriver is offline CHR Member/Contributor Visit my Photo Gallery
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    Dont know if this might possibly help but here it is anyways.
    http://www.acdelco.com/parts/sparkpl...tification.jsp
    Friends dont let friends drive fords!

  15. #15
    gearGrinder's Avatar
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    Quote Originally Posted by BigTruckDriver View Post
    Dont know if this might possibly help but here it is anyways.
    http://www.acdelco.com/parts/sparkpl...tification.jsp
    Good info to have, thanks! Still looking for a Delco plug that will work...
    Burning gunpowder and gasoline daily for over 20 years and counting!

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