Dual mass flywheel article
Thread Starter
Burning Brakes
Joined: Feb 2004
Posts: 829
Likes: 39
From: sun prairie wi
I have an 89 that soon will need a clutch.I know its been recommended on the forum to replace the dual mass with a solid.I'm just worried that it will harm the ZF 6spd and those are expensive to replace.Anyone have any problems with the solid replacement flywheel?
Drifting
Joined: Sep 2003
Posts: 1,363
Likes: 7
From: 1994 LT1 Coupe 6-speed with FX3 & 2000 LS1 Vert 6-Speed with F45 Hunterdon County, NJ
DINO84,
I used 100% GM parts 4 yrs ago when doing pilot-bearing, DMF, clutch, pressure plate, release bearing, etc. on our 94 which has 100k miles -- it still shifts like butter -- and is smooth as silk with no marble or rattling noises. It shifts and is smoother than our y2k C5 verte with only 12k and our y2k transam with 100k.
Even at the expensive GM dealer discounted price (which is $100s more than getting it directly from Carolina clutch -- wish I had known then) it was still worth it, based on how well it shifts and drives, and I would do it again in a heartbeat.
Remember, practically no one says the DMF is bad, just expensive. Isn't the adage: you get what you pay for --
Needless to say, I would recommend replacing the DMF with a DMF if needed (remember the test mentioned in the article).
I used 100% GM parts 4 yrs ago when doing pilot-bearing, DMF, clutch, pressure plate, release bearing, etc. on our 94 which has 100k miles -- it still shifts like butter -- and is smooth as silk with no marble or rattling noises. It shifts and is smoother than our y2k C5 verte with only 12k and our y2k transam with 100k.
Even at the expensive GM dealer discounted price (which is $100s more than getting it directly from Carolina clutch -- wish I had known then) it was still worth it, based on how well it shifts and drives, and I would do it again in a heartbeat.
Remember, practically no one says the DMF is bad, just expensive. Isn't the adage: you get what you pay for --
Needless to say, I would recommend replacing the DMF with a DMF if needed (remember the test mentioned in the article).
Pro
Joined: Oct 2003
Posts: 550
Likes: 0
From: Hesperia California
It depends on what you want. A few years ago, I rebuilt the motor in my 89 and put new clutch ans dual mass flywheel in. I did however take the flywheel to the engine builder and he balanced the motor with the flywheel on. Totally smooth running.
I recently pulled and modded my motor. I decided to leave the dual flywheel alone because of the drivability.
I am not sure how they balance everything when replacing the dual mass, but there is a way.
Good luck!
I recently pulled and modded my motor. I decided to leave the dual flywheel alone because of the drivability.
I am not sure how they balance everything when replacing the dual mass, but there is a way.
Good luck!
Racer
Joined: Mar 2003
Posts: 346
Likes: 33
From: OKC OK
I recently installed a Spec single mass STEEL flywheel & Carolina Clutch press plate & disc. The new flywheel only makes slightly more noise than the DMF did. I've only noticed this when very low in RPM range & lightly accelerating, my black tag ZF whines enough to hear it now. This new flywheel is 12 pounds lighter than the DMF & that has more bennefit when driving than just added noise.
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Race Director
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From: Overland Park Kansas
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Seemed to work for "metal tech" (above your post)....
Thread Starter
Burning Brakes
Joined: Feb 2004
Posts: 829
Likes: 39
From: sun prairie wi
Thanks all for your replys.A couple of questions.When replacing the clutch and the dm flywheel is still good can it be resurfaced?And what price is the carolina dm flywheel?Thanks
Team Owner
Joined: Sep 2002
Posts: 22,209
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From: OBAMA IS HITLER
no single mass for me, man.
went thru the aluminum gig a few years ago, the noise and clanging of that damned thing far outreached any fly-by-seat-of-the-pants neato-burrito revving it did.
no way, jose.
went thru the aluminum gig a few years ago, the noise and clanging of that damned thing far outreached any fly-by-seat-of-the-pants neato-burrito revving it did.
no way, jose.
Race Director
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From: Overland Park Kansas
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Price of the CC DMF is on their website.
Race Director
Joined: Apr 2000
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From: Texas
Safety Car
Joined: May 2006
Posts: 4,290
Likes: 140
From: Salem NH
Race Director
Joined: Nov 2003
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From: Overland Park Kansas
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Why don't I remember transmission rattles/noises when I owned a 1968 GTO with (muncie/saginaw?) 4-spd growing up?
Also, Tom @ CC did mention their stage (x) clutches would absorb part of the DMF's dampening function.
Also, Tom @ CC did mention their stage (x) clutches would absorb part of the DMF's dampening function.
Racer
Joined: Mar 2003
Posts: 346
Likes: 33
From: OKC OK
I am running the Stage 3 clutch from Carolina Clutch, a 6 bronze pad sprung hub disc. In going to a single mass flywheel I saw no need to use a non-srung hub disc, either the flywheel or disc needs some dampening capability IMHO. This type of setup does work with a sintered iron disc & adjustable pressureplate for drag racing. Each of us has different things we'll tolerate versus another person. With my 3" B&B Triflow exhaust (& drone) I like the mechancial music the car makes, others would never tolerate a trip around the block with this "noise". BTW, with 300+ miles, this clutch is not as harsh as I thought it would be, still easy to drive in traffic.
Safety Car
Joined: May 2006
Posts: 4,290
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From: Salem NH
The engine RPM is not a steady factor, it will fluxuate which causes a push/pull on the input shaft of the transmission which creates a rattle.
I use fort wayne for all my clutches. Scott custom makes them for me.
-- Joe
Safety Car
Joined: May 2006
Posts: 4,290
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From: Salem NH
I am running the Stage 3 clutch from Carolina Clutch, a 6 bronze pad sprung hub disc. In going to a single mass flywheel I saw no need to use a non-srung hub disc, either the flywheel or disc needs some dampening capability IMHO. This type of setup does work with a sintered iron disc & adjustable pressureplate for drag racing. Each of us has different things we'll tolerate versus another person. With my 3" B&B Triflow exhaust (& drone) I like the mechancial music the car makes, others would never tolerate a trip around the block with this "noise". BTW, with 300+ miles, this clutch is not as harsh as I thought it would be, still easy to drive in traffic.
I've had a few different exhausts on the car. The LT1 catback with resonators did the trick. Nice and quiet the way it should be.
I've had cars with loud exhaust, straight-cut blowers, and all kinds of noisy stuff. I'm at the point in my life where I think I can build a car that is just as fast but sounds stock.
-- Joe
Racer
Joined: Mar 2003
Posts: 346
Likes: 33
From: OKC OK
Joe, You make some valid points. By having someone you trust & know build your clutch's he knows what you'll tolerate & how to build something that will hold, good on you. Yes a silent "killer" is the greatest weapon as your oponent/victim never knew what was next to them. My "vision" of my corvette is as that of a road warrior, more road racer than drag racer, & noise makes no difference to me as noise means nothing when the curves start. We each try to help each other over many miles, it's very difficult to convey every aspect that a change may have to our cars so as another can make a choice based upon our evaluation. To Greg Penn, if he asks I'd let him drive my car if it'd help him buy parts he wants(he's in Kansas/i'm in OK). The only thing each of us can do is represent the facts as we see/feel them to others. Al