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Confirmation of timing marks on a 56 Dodge with harmonic damper ?
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56D500boy
Posted 2020-05-10 9:51 PM (#598058)
Subject: Confirmation of timing marks on a 56 Dodge with harmonic damper ?



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I need/want to check the timing on my 56 Dodge D500 hemi. The Sun Electric tuning card says 2 degrees Before Top Dead Center.

Are these the correct marks (below)?

First a bare damper (not mine) that I've annotated, then mine:



Edited by 56D500boy 2020-05-10 9:58 PM




(TimingMarksOnDamper_Annotated.jpg)



(DaveFs56DodgeD500TimingMarks.jpg)



Attachments
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Attachments TimingMarksOnDamper_Annotated.jpg (86KB - 28 downloads)
Attachments DaveFs56DodgeD500TimingMarks.jpg (112KB - 28 downloads)
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samstrader
Posted 2020-05-11 3:24 AM (#598072 - in reply to #598058)
Subject: RE: Confirmation of timing marks on a 56 Dodge with harmonic damper ?


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Location: Beaumont TX
Your timing marks look like mine, 1955 259, and I read them like you have shown in the first picture. I set my timing at 4 BTDC.

I don't know if I've been reading right but the way you have the first picture market looks logical to me.
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StillOutThere
Posted 2020-05-11 12:40 PM (#598083 - in reply to #598058)
Subject: Re: Confirmation of timing marks on a 56 Dodge with harmonic damper ?



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Location: Under the X in Texas
Harmonic balancers have inner and outer steel vulcanized with a rubber center. The outer steel can and WILL eventually move on the aging, deteriorating rubber. I never trust an old balancer's timing marks. Mechanically find top dead center for #1 cylinder and make your own marks. OR, if really deteriorated, have your balancer rebuilt (revulcanized) by one of the several companies offering the service and do this BEFORE it totally comes apart potentially destroying your radiator.
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57chizler
Posted 2020-05-11 6:23 PM (#598103 - in reply to #598083)
Subject: Re: Confirmation of timing marks on a 56 Dodge with harmonic damper ?



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StillOutThere - 2020-05-11 9:40 AM

I never trust an old balancer's timing marks.


I agree. Had many a spun damper over the years.
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samstrader
Posted 2020-05-12 11:12 AM (#598141 - in reply to #598058)
Subject: Re: Confirmation of timing marks on a 56 Dodge with harmonic damper ?


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Location: Beaumont TX
In my 1955 Plymouth/Dodge 259, the pully on the crank, which is where the timing marks are, is solid. It does not have the rubber a harmonic balancer has. The fan belt hub is pressed on to the part that goes on the crank shaft. Still a good idea to verify the timing marks with a TDC check.
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samstrader
Posted 2020-05-13 4:57 AM (#598178 - in reply to #598141)
Subject: Re: Confirmation of timing marks on a 56 Dodge with harmonic damper ?


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Location: Beaumont TX
Pictures of my Crankshaft pulley with Timing Marks that does not have the rubber a normal harmonic balancer has. 1955 259 V8... There is no harmonic balance on this car as far as I can tell.



(Untitled1.png)



(Untitled2.png)



(Untitled3.png)



Attachments
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Attachments Untitled1.png (212KB - 29 downloads)
Attachments Untitled2.png (225KB - 29 downloads)
Attachments Untitled3.png (157KB - 28 downloads)
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56D500boy
Posted 2020-05-14 9:56 PM (#598291 - in reply to #598058)
Subject: RE: Confirmation of timing marks on a 56 Dodge with harmonic damper ?



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Finally got of my aSH and dug out my cheapo Equus inductive timing light and checked the timing.
Assuming that the harmonic damper is okay (yes, I need to confirm that for sure), the timing was
set previously by a *PROFESSIONAL* at about 8 deg *AFTER* TDC . Hmm..... and I paid for this??

Never again. Spec for the D500 is 2 deg Before TDC. I set it to 4 deg BTDC and went for a spin.
Much improved power and no more strange hesitation. Why I waited so long to check and reset the timing,
only my procrastinating Mother (now dead for 6 years) knows. DUH.

I will set it to 2 deg BTDC (after checking TDC) sometime soon.



Edited by 56D500boy 2020-05-14 9:59 PM
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samstrader
Posted 2020-05-21 12:38 PM (#598585 - in reply to #598058)
Subject: Re: Confirmation of timing marks on a 56 Dodge with harmonic damper ?


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Posts: 196
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Location: Beaumont TX
If the engine is not pinging, why not leave it set at 4 degrees BTDC? It will run stronger and get better gas mileage.

I can't remember if you still have points or not but as the points wear down, the timing changes. Maybe this could be part of the reason your timing was so far off. I wonder if the professional disconnected the vacuum advance before setting the timing?
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56D500boy
Posted 2020-05-27 9:55 PM (#598861 - in reply to #598058)
Subject: RE: Confirmation of timing marks on a 56 Dodge with harmonic damper ?



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Any real good guesses as to the diameter of a 56 Dodge Harmonic balancer? Measuring from above I *think* it might be 6.375" but I really can't tell accurately. I don't want to take the rad out just to measure it the pulley/balancer diameter.

I want to buy one of the MSD 8985 timing mark sheets *IF* what they have will work. They have 6.375" but they skip 6.50" and go directly to 6.75".

This:



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