Dual Mass Flywheel Question
Thread Starter
Cruising
Joined: Dec 2023
Posts: 10
Likes: 0
Dual Mass Flywheel Question
I have a 1992 base model convertible. The clutch needs to be replaced. I have started looking at new clutches and notice a lot of options to replace the dual mass flywheel with a solid flywheel.
I have read that the solid flywheel can increase noise and vibration. Do I get the flywheel resurfaced or do I need to get a new one? I haven't found much guidance on this.
Thanks
I have read that the solid flywheel can increase noise and vibration. Do I get the flywheel resurfaced or do I need to get a new one? I haven't found much guidance on this.
Thanks
Safety Car
Joined: Jun 2010
Posts: 4,564
Likes: 1,676
I have started looking at new clutches and notice a lot of options to replace the dual mass flywheel with a solid flywheel.[/QUOTE
You mean the only option is a single mass. There are no replacement dual mass flywheels.
I have read that the solid flywheel can increase noise and vibration. Do I get the flywheel resurfaced or do I need to get a new one? I haven't found much guidance on this.
Thanks
You mean the only option is a single mass. There are no replacement dual mass flywheels.
I have read that the solid flywheel can increase noise and vibration. Do I get the flywheel resurfaced or do I need to get a new one? I haven't found much guidance on this.
Thanks
This is a widely known issue and a search will help fill in the gaps.
Race Director
Joined: Feb 2008
Posts: 19,691
Likes: 322
From: Alexandria VA
1.) Most places can't machine a DM FW. You may have some place near you that can. As stated above, top plate needs to be locked down. This assumes it's servicable.
2.) W/O a DM flywheel, it causes the trans to rattle a bit more. Honestly, it's never bothered me but I could see how it would for some.
3.) Carolina Clutch has some good clutch options at a good value.
2.) W/O a DM flywheel, it causes the trans to rattle a bit more. Honestly, it's never bothered me but I could see how it would for some.
3.) Carolina Clutch has some good clutch options at a good value.
Drifting
Joined: Jun 2020
Posts: 1,709
Likes: 734
From: Stay dangerous my friends
Billet steel flywheel would be a lot lighter, stronger, harder than the Dual Mass… but beware of counterfeits from China. The trick is getting a sprung hub clutch instead of a solid clutch, so there has to be a recess/room for it. It will not be as quiet as a DMF but close.
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
IIRC, the ZFDoc recommends using maroon "scotchbrite" to clean up the DMF when swapping out your clutch.
Instructor
Joined: Mar 2024
Posts: 159
Likes: 94
From: Vassar, MI
Just got my car back yesterday with a new clutch and flywheel, perfect timing!
As others have mentioned, it's hard to properly resurface a DMF. I ended up doing the swap to a solid flywheel with a sprung hub clutch disc. There is some gear rollover noise, but I can tolerate it. The ZFs in these cars are known to be noisy.
In case you look at doing the solid flywheel conversion, know that a 93-97 LT1 Camaro flywheel will work, but you need to have the face machined down .090". I bought a LUK LFW282, it was like $90 or something on Rock Auto.
As others have mentioned, it's hard to properly resurface a DMF. I ended up doing the swap to a solid flywheel with a sprung hub clutch disc. There is some gear rollover noise, but I can tolerate it. The ZFs in these cars are known to be noisy.
In case you look at doing the solid flywheel conversion, know that a 93-97 LT1 Camaro flywheel will work, but you need to have the face machined down .090". I bought a LUK LFW282, it was like $90 or something on Rock Auto.
Thread Starter
Cruising
Joined: Dec 2023
Posts: 10
Likes: 0
Thanks to everybody who has responded. This gives me a good place to start resolving this issue.
I have seen a couple of posts about using the Camaro flywheel but cutting it down to the proper thickness for my car. Where does the .090" cut dimension come from? Is this common knowledge or out of a manual?
I have seen a couple of posts about using the Camaro flywheel but cutting it down to the proper thickness for my car. Where does the .090" cut dimension come from? Is this common knowledge or out of a manual?
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Thread Starter
Cruising
Joined: Dec 2023
Posts: 10
Likes: 0
If I go with the single mass flywheel, do I need to worry about balancing the new one to match the original DM flywheel? I read that you are supposed to check the DM flywheel for additional balancing to the specific engine and if so, add the same weight to the new flywheel. Where do you get the weights to do this, I have not found a listing for that.