Pulley broken

Guten Morgen!


Chris Horn from New Zealand wrote back to me yesterday after three days. He offers me the damping wheel for NZ-$ 560.
At first it seems glance, that it is not a small price, but it is fair and not excessive given because of the complex manufacturing costs.
Unfortunately, there are also approximately €140 for shipping and, even worse, another 7-10% customs duty plus 19% VAT on top of everything. That brings the total to about US-$ 525-545.

That's quite a hefty price, and it stings a bit. But I'm a techie and detail-oriented person, so maybe I'll actually go ahead and order it tonight. Maybe ...


Thanks at everyone for the helpful advises!
 
When I bought mine it was $300 US, shipping included. At the current exchange rate that is ~$340 US.
 
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My thoughts ...

... what I'm not quite clear on is the low mass of the compensating pulley, at 3 kg with a diameter of approximately 12 cm.
The A-flywheel measures 55 cm and weighs 15 times as much.

I recall/believe that the imbalance is calculated at 0.7 of the radius, circumferential speed raised to the cube x weight.

At a typical cruising speed of only 1500 rpm, this doesn't result in much compensating force.


Or I am I missing think something?
 
Werner said:
what I'm not quite clear on is the low mass of the compensating pulley, at 3 kg with a diameter of approximately 12 cm.
The A-flywheel measures 55 cm and weighs 15 times as much.

I recall/believe that the imbalance is calculated at 0.7 of the radius, circumferential speed raised to the cube x weight.

At a typical cruising speed of only 1500 rpm, this doesn't result in much compensating force.
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As I understand it, the harmonic damper is meant to be used as part of a "defense in depth" strategy, i.e., it is not a solution by itself.

People who recommend the use of the damper typically recommend it as part of a strategy to rebalance the rotating assembly overall: lighter pistons, lighter flywheel, added counterweights, and a harmonic damper. This redistributes the mass of the assembly in a way that reduces the crankshaft's tendency to flex under heavy loads and at high speeds. These changes, combined with oil filtration to remove contaminants quickly, are thought to prolong the life of the crankshaft bearings. And of course it changes the behavior of the engine.
 
N'Abend Alexis,


thank you for the simple explanation. I understand now. I had seen it between my ears too narrowly, not as a partial addition to a complete solution.


Thanks once more again.
 
Guten Tag.

I must apologize for some misinformation in # 21.

I made two mistakes. I overlooked the fact that Mr. Horn's quoted price already included shipping costs. Furthermore, there is a trade agreement with Germany that exempts products manufactured in New Zealand from customs duties.

In that case, the price is about $150 lower, which is a better deal. Sorry! -


But I have one other further question:
Is it right, that I understood, that when using the thick Teflon strip (the white one), the running surface should be milled with grooves for backflow?
Won't these grooves damage the Teflon mesh through abrasion?

Thank you all in advance! __________________
 
Werner said:
Guten Tag.

Is it right, that I understood, that when using the thick Teflon strip (the white one), the running surface should be milled with grooves for backflow?
Won't these grooves damage the Teflon mesh through abrasion?

Thank you all in advance! __________________
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Werner, if you are referring to the timing cover "rope" seal https://www.snydersantiqueauto.com/product.htm?pid=978847&cat=41694 (Someone called it a "Goose Turd"), no, the reverse scowl on the damper will not hurt it. In fact, I had a slight weep from my front seal and it stopped when I installed the damper, never to return... so far. That was ~7 years ago.

46943603005_52ebd521bd_z.jpg
 
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Hello,

the harmonic vibration damper arrived within 5 days. Chris Horn made a very good job. It fits perfectly.
It's quite a hefty piece. Tightening the 1 2/8" crankshaft nut it seems would a bit tricky, as the outer diameter of the socket have to be ground down slightly.
Thanks at all for your much advices!

Gruesse auch nach NZ,
Werner
 

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Werner, I think we would all like to hear your impressions on the effect of the balancer on the smoothness of the engine.
 
International shipping sometimes is surprising. At one point I was restoring antique BMW motorcycles and was regularly getting parts shipments from suppliers in Germany and England. Shipping times and generally costs to California were much less than from locations within the US.


Out of the US - can't say.
 
JayJay said:
International shipping sometimes is surprising. At one point I was restoring antique BMW motorcycles and was regularly getting parts shipments from suppliers in Germany and England. Shipping times and generally costs to California were much less than from locations within the US.


Out of the US - can't say.
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I sometimes buy stuff from a friend in Arizona. He used to us USPS but we have found UPS is quicker and cheaper. Hmmmm!
At the other end of the scale, I have told here before that to bring anything over here by surface freight (anything heavy or bulky), it takes 3-4 months. On one occasion, it took 18 months for a car to arrive but that was delayed by industrial trouble on the US docks. I was beginning to wonder if I would ever get it.
 
Synchro909 said:
Werner, I think we would all like to hear your impressions on the effect of the balancer on the smoothness of the engine.
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Hello Synchro [as a long-time contributor, could you please also give us your first name?] and fellow readers.

I'd be happy to do that. But my statement is only half valid. I'm currently rebuilding my old, broken engine into a used short block that an exceptionally kind forum member from Nebraska procured for me.
That means when the "new" engine is driving, it's a an other engine, so a direct before/after comparison perhaps isn't possible.
 

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Werner said:
Hello Synchro [as a long-time contributor, could you please also give us your first name?] and fellow readers.
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Werner, my christian name is Arnold. I won't tell what my wife calls me other than to say it starts with "A" as well!!
It ends in "hole".
 
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