Mass damper on diff input flange? - Miata Turbo Forum - Boost cars, acquire cats.

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Old 01-15-2011, 01:32 AM   #1
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Default Mass damper on diff input flange?

Anybody go to the trouble to remove that thing?
The automatics didnít have it and 1.6lís didnít have it so I canít believe that it is too critical. Looks like it must weigh a couple pounds; a couple pounds of rotating weight Id rather not have on my drive train if it is only there for a minor vibration concern.

I thought about getting a flange from an auto but it doesnít look like I can find one for cheap. So Iím thinking of hacking away to remove one.

What Iím talking about can be seen here.
http://www.miata.net/garage/diffguide/index.html

Bob
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Old 01-15-2011, 10:12 AM   #2
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I currently don't have one and Ben isn't running one either. I'm not sure what we do to our cars, but on both of them the rubber started to separate and it would move freely. He did the removal job on both diffs and there hasn't been any problems yet.
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Old 01-15-2011, 12:12 PM   #3
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How ling has it been since it was removed? Any idea how much it weighs?

Have a great day,
Jared
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Old 01-15-2011, 01:15 PM   #4
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I'd say about 4-5lbs. It's pretty solid. I took it off my 96 (w/lsd) and ran it like that for 150k mile (between having that diff on my 96 and my 99) with no problems.
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Old 01-15-2011, 06:33 PM   #5
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I just took it off. With the damper the input flange is just under 4 lbs. With the damper and rubber removed it is just less than 2 lbs. The mass damper is right at 2 lbs by itself.

Bob
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Old 01-15-2011, 07:30 PM   #6
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Nice.

I will be taking mine off asap.

Thanks for the great info.
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Old 01-16-2011, 01:43 AM   #7
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Troy that should help you out a bit.. Sounds like a good idea.
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Old 01-16-2011, 12:22 PM   #8
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Damn, I always thought it had a small part in why 1.8 diffs are stronger than 1.6 diffs, transfering less of the harshness. JayL and Dopple aren't exactly nice to their cars though...

What is it then, just a rubber disc molded on behind the flange?
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Old 01-16-2011, 12:43 PM   #9
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Yep, just a rubber disc molded on behind the flange. Most likely just a NVH type of thing.
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