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Thread: Ping, ping and ping

  1. #11
    Join Date
    Mar 2017
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    518

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    Quote Originally Posted by Rubone View Post
    H-D always tried to use lower compression for sidecar rigs. Other than that a timer with an adjustable advance curve would help, factory auto advance is too quick. Dual plug heads help as well for a flame front from both sides overcoming some of the Hemi drawbacks..
    Harley did not have stiffer springs for the auto advance, does anyone offer them? I wish someone would come out with an Evolution, cylinder head design that looks like a shovelhead, I could run flat top pistons and have more power.
    What cylinder heads do you recommend, STD? I know S&S are out of the question. Do panheads run cooler than shovelheads? They have panheads with shovelhead intake and exhaust ports.

  2. #12
    Join Date
    Dec 2001
    Posts
    529

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    I run Lockhart coolers on the '67 FLH and the '81 FXB. Came stock on the '81 added on the '67. I always felt Shovel run warmer. I never run the covers in winter because it not the cold out here and never bothered with a thermostat but that's just me. Never had the '81 ping but once in a blue moon the '67 under heavy load on big hills the FLH could.
    DrSprocket

  3. #13
    Join Date
    Mar 2017
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    518

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    Quote Originally Posted by RichO View Post
    I run Lockhart coolers on the '67 FLH and the '81 FXB. Came stock on the '81 added on the '67. I always felt Shovel run warmer. I never run the covers in winter because it not the cold out here and never bothered with a thermostat but that's just me. Never had the '81 ping but once in a blue moon the '67 under heavy load on big hills the FLH could.
    I think a lot of my issue is in the timer. The idle will jump up about 400 rpm for a while, then I will idle it down and it will be ok for a bit, then the idle drop too low to run.T
    I have a lockhart cooler laying on the shelf, but it is kind of beat up so I am still looking for one to fit around my police shifter and sidecar mounts.
    Thank you!

  4. #14
    Join Date
    Jul 2010
    Location
    Ohio
    Posts
    744

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    Ryan,

    You never mention if you are advancing the cam by hand when checking timing at the advanced mark. It sounds like you are too advanced. I know your engine is together, but when assembling a new motor I use a travel indicator on the front cylinder piston to establish the true 7/16 BTC and make a scribe mark by the timing hole to static time to later. It is a lot better then guessing center, front of center, a little behind center, etc. I am not saying a oil cooler wouldn't help, but I have been running my '69 in both hot FL weather and both hot and cold OH weather without a cooler for 54K miles and I don't seem to have a per ignition issue when the timing is correct. Good luck.
    Bob Rice #6738

  5. #15
    Join Date
    Mar 2017
    Posts
    518

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    Quote Originally Posted by BigLakeBob View Post
    Ryan,

    You never mention if you are advancing the cam by hand when checking timing at the advanced mark. It sounds like you are too advanced. I know your engine is together, but when assembling a new motor I use a travel indicator on the front cylinder piston to establish the true 7/16 BTC and make a scribe mark by the timing hole to static time to later. It is a lot better then guessing center, front of center, a little behind center, etc. I am not saying a oil cooler wouldn't help, but I have been running my '69 in both hot FL weather and both hot and cold OH weather without a cooler for 54K miles and I don't seem to have a per ignition issue when the timing is correct. Good luck.
    Bob,
    Yes, I am putting the flywheel mark in the center of the timing hole after the intake closes, advancing the cam on the timer and moving the distributor to static time it, points are set at .020" . I also timed it with cigarette cellophane and comes out to the same spot as with a bulb. The timer was working fine, but cleaned and lubed it anyway.
    So now what do you suggest I do? What about timing it with a timing light? I guess I can always back it off a little at a time.

    Another thread that brought up issues of heat and timing.


    https://forum.antiquemotorcycle.org/...658#post192658
    Last edited by ryan; 09-09-2020 at 07:45 PM.

  6. #16

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    On the Nashville Road Run last year I was having a conversation with a gentleman named Tom from Illinois about my '67 FLH being prone to pinging while trying to accelerate on long uphill grades. He suggested changing to heavier advance weight springs and offered to send me a pair from his shop when he got home. I installed them and it has helped. The ones he sent were V-Twin. The label on the package said "HD Ignition Severe Duty Advance Weight Springs" and had a part number 13-9247. On the V-Twin website, there's also a 13-9246, which looks exactly like what I got. All I can say is it seems to have cut down pinging when accelerating on hills in 4th gear. And if it won't take throttle without pinging, it's time to drop into third. Hope this helps.

  7. #17
    Join Date
    Dec 2001
    Posts
    529

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    Jim, My 67 FLH would do exactly the same thing until I dropped a gear and brought the rev's up. They don't like being bogged down. It's the nature of the beast. It's sort of like an EL that don't have the weight in the flywheels and on a long uphill climb they need you to drop a gear so they don't bog down. With an FLH though they want to ping.
    DrSprocket

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