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Old 02-17-2007, 07:14 PM
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Harmonic balancers - extra weight?

I've made an adapter / spacer to mount a timing wheel onto the harmonic balancer. It's around 2" thick and weighs around 1kg - will the extra weight affect the function of the balancer?

just curious, any thoughts?

thanks

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Old 02-17-2007, 07:34 PM
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i don't know what 1 kg is,but 2 in is a lot if it isn't balance right
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Old 02-17-2007, 08:13 PM
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No, I don't think so. You've bolted to the inner hub of the damper which shouldn't affect the relationship between the hub and the outer ring. The ring's job is to dampen harmonics generated in the crankshaft. Just make sure that no part of your spacer is touching the elastomeric material between the hub and the ring or the ring itself.
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Old 02-17-2007, 08:17 PM
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If it were me....I would just get some timing tape ( about 5 bucks) and put it on the damper, thats all you need and it won't affect balance or anything.
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Old 02-17-2007, 09:15 PM
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Quote:
Originally Posted by Henry Highrise
If it were me....I would just get some timing tape ( about 5 bucks) and put it on the damper, thats all you need and it won't affect balance or anything.
I agree ...wouldnt the added rotating mass take away some ponies?

Shane
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Old 02-17-2007, 10:24 PM
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I won't affect hp, but it could affect throttle response.

I'm not a picky balance guy, but a well balanced assembly is within about 10 grams and you're talking about adding a sorta random piece of steel that is 1000 grams. I'd be concerned.
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Old 02-17-2007, 11:20 PM
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This is the spacer and timing cog:

it's been turned up on a lathe - so should be 100% balanced, more concerned about the weight of the balancer and the relationship this weight plays on harmonic dampening. More out of curiosity than anything else. If its the outer ring that does all the work than no worries this is mounted to the central part.

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Old 02-18-2007, 12:20 AM
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I don't see a problem, other than I think I would have made it out of aluminum and undercut the center barrel like a wire spool. It could be a lot lighter.
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Old 02-18-2007, 01:50 AM
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KG(kilogram) equals 2.2 pounds
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Old 02-18-2007, 04:55 AM
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Is that a VR sensor and a 36-1 trigger wheel?? What engine is that? Here's one on eBay made from steel. Yours should be a lot lighter so you should be ok.
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Old 02-18-2007, 07:48 AM
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Timing tape rarely stays on for very long. My balancer ('70 350 LT-1 engine) is fully degreed with marks every 2 degrees for 360 degrees. A long time ago Moroso sold them this way. Very handy for timing and it never wears off.
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Old 02-18-2007, 01:21 PM
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Quote:
Originally Posted by RippinRon
Is that a VR sensor and a 36-1 trigger wheel?? What engine is that? Here's one on eBay made from steel. Yours should be a lot lighter so you should be ok.
Hi Ron, thanks for the link.
its a Holden (Oz GM) late 1960's 186ci I6, yep with a VR sensor, trigger wheel and coil packs from a 2000? model ford. Megasquirt V2.2 ecu (only using it for spark ATM). Cheap way of getting program-able spark, just mucho mucking around.
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