Dual and Single Mass flywheel
Thread Starter
Team Owner
Joined: Apr 2001
Posts: 22,267
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From: Dallas TX
Dual and Single Mass flywheel
R94LT1 is at work, but asked me to post what the good and bad of each of these are. He needs a new one, and GM wants $700! :eek:
[Modified by Glock'94, 2:28 PM 7/9/2002]
[Modified by Glock'94, 2:28 PM 7/9/2002]
Pro
Joined: Nov 1999
Posts: 623
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From: Toronto, ON, Canada
Re: Dual and Single Mass flywheel (Glock'94)
I'm debating the same choice while waiting to get my Clutch done.
Dual-Mass (requires unsprung clutch)
Pros: - Stock choice from factory.
- Larger rotating mass (easier to get going at lower speeds)
Cons: - Expensive ($$$)
- Heavy and wastes HP spinning flywheel.
Single Mass (requires sprung clutch)
Pros: - Light weight (more HP to wheels)
- Cheaper than dual mass ($150-$200)
Cons: - Noisy while clutch is out and in neutral (sounds like broken tranny)
- little more difficult to get car moving from start
If you can live with the noise get the single mass, if your concerned about looking good sitting at the lights consider the dual-mass.
[Modified by XTwinTurbo, 2:52 PM 7/9/2002]
Dual-Mass (requires unsprung clutch)
Pros: - Stock choice from factory.
- Larger rotating mass (easier to get going at lower speeds)
Cons: - Expensive ($$$)
- Heavy and wastes HP spinning flywheel.
Single Mass (requires sprung clutch)
Pros: - Light weight (more HP to wheels)
- Cheaper than dual mass ($150-$200)
Cons: - Noisy while clutch is out and in neutral (sounds like broken tranny)
- little more difficult to get car moving from start
If you can live with the noise get the single mass, if your concerned about looking good sitting at the lights consider the dual-mass.
[Modified by XTwinTurbo, 2:52 PM 7/9/2002]
Drifting
Joined: Apr 2000
Posts: 1,803
Likes: 1
From: PA
Re: Dual and Single Mass flywheel (XTwinTurbo)
It does not take more HP to spin a heavy flywheel. It is a stored energy device. The flywheel's effect on crank/motor acceleration and deceleration occurs primarily when the car is in neutral or the clutch is depressed.
Thread Starter
Team Owner
Joined: Apr 2001
Posts: 22,267
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From: Dallas TX
Re: Dual and Single Mass flywheel (XTwinTurbo)
If it were me, i could careless about the noise :). Oh yeah, i have no cats and no mufflers, i guess that would be assumed, haha. And 1.6 roller rockers are pretty darn loud too, so there some more noise. :D
As for me, Flexplates are cheap :D
[Modified by Glock'94, 2:57 PM 7/9/2002]
As for me, Flexplates are cheap :D
[Modified by Glock'94, 2:57 PM 7/9/2002]
Pro
Joined: Nov 1999
Posts: 623
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From: Toronto, ON, Canada
Re: Dual and Single Mass flywheel (Rick93Z07)
It does not take more HP to spin a heavy flywheel. It is a stored energy device. The flywheel's effect on crank/motor acceleration and deceleration occurs primarily when the car is in neutral or the clutch is depressed.
[Modified by XTwinTurbo, 2:58 PM 7/9/2002]
Thread Starter
Team Owner
Joined: Apr 2001
Posts: 22,267
Likes: 3
From: Dallas TX
Re: Dual and Single Mass flywheel (XTwinTurbo)
It does not take more HP to spin a heavy flywheel. It is a stored energy device. The flywheel's effect on crank/motor acceleration and deceleration occurs primarily when the car is in neutral or the clutch is depressed.
You are correct, there is no change in HP for your car but a lighter flywheel will let your Vette accelerate faster then with a heavy one. (Slightly faster 1/4 mile)
[Modified by XTwinTurbo, 2:58 PM 7/9/2002]
You are correct, there is no change in HP for your car but a lighter flywheel will let your Vette accelerate faster then with a heavy one. (Slightly faster 1/4 mile)
[Modified by XTwinTurbo, 2:58 PM 7/9/2002]
Drifting
Joined: Aug 2000
Posts: 1,614
Likes: 0
From: Colleyville Texas
Re: Dual and Single Mass flywheel (Glock'94)
Happy with the SMF set up-- Camaro Flywheel/Mcleod clutch in my 396. Noise is not an issue at all. $450 for the complete set up is alot better than $700 for just the flywheel. You need to watch your tach though. 6000RPM's comes real fast in a stroker with the SMF. :D
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Le Mans Master
Joined: Apr 2001
Posts: 7,411
Likes: 253
From: Little Elm TX
Re: Dual and Single Mass flywheel (Red Rocket)
Happy with the SMF set up-- Camaro Flywheel/Mcleod clutch in my 396. Noise is not an issue at all. $450 for the complete set up is alot better than $700 for just the flywheel. You need to watch your tach though. 6000RPM's comes real fast in a stroker with the SMF. :D
BTW, thanks to Glock'94 for getting this up before I could get online.
Melting Slicks
Joined: Jun 2001
Posts: 3,444
Likes: 0
Re: Dual and Single Mass flywheel (Glock'94)
When I did mine I wound up cutting the dual mass, even though this is supposed to be a no no. It only had minor burns and .006 cleaned it up.
I was scared away from all the horror stories I read of people having vibration, fit, engage, disingage, and noise problems. Seemed like 50% of those who converted had some sort of issue which caused them at worse to pull out the tranny again.
I didn't want to spend the $700 so I took a chance and cut the old one. It is holding up fine.
Just keep in mind, the stock LT1 rotating assembly is externally balanced. A single mass nuetral balanced wheel will likely have vibration issues.
Oh, I am glad you mentioned your 1.6 RR are noisy. Mine are too and I was ready to pull the covers and try adjusting them again. The engine runs fine but they are louder than the stock RR's. I was thinking the rollers would be quieter!
I was scared away from all the horror stories I read of people having vibration, fit, engage, disingage, and noise problems. Seemed like 50% of those who converted had some sort of issue which caused them at worse to pull out the tranny again.
I didn't want to spend the $700 so I took a chance and cut the old one. It is holding up fine.
Just keep in mind, the stock LT1 rotating assembly is externally balanced. A single mass nuetral balanced wheel will likely have vibration issues.
Oh, I am glad you mentioned your 1.6 RR are noisy. Mine are too and I was ready to pull the covers and try adjusting them again. The engine runs fine but they are louder than the stock RR's. I was thinking the rollers would be quieter!
Le Mans Master
Joined: Apr 2001
Posts: 7,411
Likes: 253
From: Little Elm TX
Re: Dual and Single Mass flywheel (Jay Axson)
When I did mine I wound up cutting the dual mass, even though this is supposed to be a no no. It only had minor burns and .006 cleaned it up.
I was scared away from all the horror stories I read of people having vibration, fit, engage, disingage, and noise problems. Seemed like 50% of those who converted had some sort of issue which caused them at worse to pull out the tranny again.
I didn't want to spend the $700 so I took a chance and cut the old one. It is holding up fine.
Just keep in mind, the stock LT1 rotating assembly is externally balanced. A single mass nuetral balanced wheel will likely have vibration issues.
I was scared away from all the horror stories I read of people having vibration, fit, engage, disingage, and noise problems. Seemed like 50% of those who converted had some sort of issue which caused them at worse to pull out the tranny again.
I didn't want to spend the $700 so I took a chance and cut the old one. It is holding up fine.
Just keep in mind, the stock LT1 rotating assembly is externally balanced. A single mass nuetral balanced wheel will likely have vibration issues.
It won't be going into a stock LT-1 car. Getting a 383 stroker as well. Not sure on the balance though. Have to check that one.
:yesnod:
Thread Starter
Team Owner
Joined: Apr 2001
Posts: 22,267
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From: Dallas TX
Re: Dual and Single Mass flywheel (R94 LT 1)
Mines WAY beyond even trying to do anything with it.
It won't be going into a stock LT-1 car. Getting a 383 stroker as well. Not sure on the balance though. Have to check that one.
:yesnod:
It won't be going into a stock LT-1 car. Getting a 383 stroker as well. Not sure on the balance though. Have to check that one.
:yesnod:
Team Owner
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From: Sydney, Australia
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Re: Dual and Single Mass flywheel (Glock'94)
This thread may be of some help. Not sure if the purchase is still running.
http://forums.corvetteforum.com/zerothread?id=329670
http://forums.corvetteforum.com/zerothread?id=329670
