Do I have pinging?
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Road Captain
Joined: Aug 2018
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From: Stockholm
Do I have pinging?
Hello,
Having a Dyna 2006, with Andrews 26, 98 ci bore and 9.2:1 corrected compression, (perhaps more as it was measured with closed throttle), I suspect I have pinging. But I do not know. (Sometimes I see knockounts on the PV, but not really that often.)
There is a rattling sound from the LEFT side, when giving a little throttle at around 2.750-3.000 rpm. It rattles wether the engine is cold or not.
Is it pinging or is it the primary chain slapping against the primary case? (I have the Hayden tensioner and have seen it give the chain a lot of movement up and down.)
If someone here with experience from listening to the pinging sound, could say if they hear it from the left side or if it comes from under the tank, it would be of great help.
P. S. I run at AFR 13.8 (idle) and 14.2 (cruising) and I have pulled timing 24 % from the original tune. The VE:s are autotuned.
Having a Dyna 2006, with Andrews 26, 98 ci bore and 9.2:1 corrected compression, (perhaps more as it was measured with closed throttle), I suspect I have pinging. But I do not know. (Sometimes I see knockounts on the PV, but not really that often.)
There is a rattling sound from the LEFT side, when giving a little throttle at around 2.750-3.000 rpm. It rattles wether the engine is cold or not.
Is it pinging or is it the primary chain slapping against the primary case? (I have the Hayden tensioner and have seen it give the chain a lot of movement up and down.)
If someone here with experience from listening to the pinging sound, could say if they hear it from the left side or if it comes from under the tank, it would be of great help.
P. S. I run at AFR 13.8 (idle) and 14.2 (cruising) and I have pulled timing 24 % from the original tune. The VE:s are autotuned.
Last edited by OakMountainRider; Jun 11, 2024 at 09:09 AM.
Thread Starter
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Road Captain
Joined: Aug 2018
Posts: 589
Likes: 93
From: Stockholm
Just tested with a 20 minutes ride. AFR 13.8 on idle and cruise. Timing pulled 24 %. About 15° C in the air. No knockcounts on the PV.
But still the same metallic rattle. It seems to be unaffected by heat. I rattles at the same level at 100° F and 260°F ET.
I believe I have pulled quite a lot of timing. It will not run well, pulling more, I know.
As the sound comes from the left side, being unaffected by heat, I tend to believe it is the primary chain.
Before I thought my compression valves were leaking as they stick after start, (and as one was not torqued well.) But I have torqued them and oiled them now with 5-56 (WD-40). No difference.
Will open the primary later, as I will replace the inner primary bearing. Then I will inspect if there are any marks from the chain and check the tension. Perhaps it is too lose and Hayden needs to be shimmed.
But still the same metallic rattle. It seems to be unaffected by heat. I rattles at the same level at 100° F and 260°F ET.
I believe I have pulled quite a lot of timing. It will not run well, pulling more, I know.
As the sound comes from the left side, being unaffected by heat, I tend to believe it is the primary chain.
Before I thought my compression valves were leaking as they stick after start, (and as one was not torqued well.) But I have torqued them and oiled them now with 5-56 (WD-40). No difference.
Will open the primary later, as I will replace the inner primary bearing. Then I will inspect if there are any marks from the chain and check the tension. Perhaps it is too lose and Hayden needs to be shimmed.
Last edited by OakMountainRider; Jun 11, 2024 at 02:33 PM.
Seasoned HDF Member
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From: poway
If it's pinging, pull more timing in that area and smooth the curve.. The timing curve won't be a simple reduce the timing xx and everything will be OK.. Give the motor what it needs not what you think it wants..
Thread Starter
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Road Captain
Joined: Aug 2018
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Likes: 93
From: Stockholm
Never thought I could use smoothing hunting pinging, as you described. But I sure will try it. It seems like a good way to do it and also to optimize the timing curve, step by step. Thanks for this advice.
Before I had severe knockcounts around 2.750 rpm/50 kpa on the front, and I tried to pull timing there, but it did not help. Then I turned the DK torque plates, which were turned reversed in an attempt to lower db (due to authority inspection), to their normal position. Voila, knockounts were all gone!
Then I turned them 90 degrees (open position) in order to stop the metallic sound, but it remained. Anyway I believe now its the primary. We will see.
Last edited by OakMountainRider; Jun 12, 2024 at 03:46 AM.
Thread Starter
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Road Captain
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From: Stockholm
affect the chain, i. e. changing its moving pattern in such a way that it makes contact with the case. But you could be right, of course.
Thread Starter
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Road Captain
Joined: Aug 2018
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From: Stockholm
Hello,
By using a microphone, I have discovered the rattling sound comes from the front primary.
By using a microphone, I have discovered the rattling sound comes from the front primary.
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Seasoned HDF Member
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From: poway
IIRC the 06 dynas had a riveted alternator rotor.. The rivets have been known to come loose.. also original comp may be worn.
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Thread Starter
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Road Captain
Joined: Aug 2018
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From: Stockholm
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I tried one of those years ago on my old FXRS and was not impressed,removed it and put a stock shoe back in.