996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

Are there any lightweight flywheels out there...

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Old 01-04-2014, 09:05 AM
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Are there any lightweight flywheels out there...

...That do NOT chatter?

I'm going to be doing a clutch swap soon, and I was also thinking of upgrading intercoolers at the same time. What I don't want is to add even more weight to the back of the car, so I thought that perhaps there is a flywheel option that is about 10-15 lbs less than stock, but still heavier than some of the other LWFW that are out there?

What are my choices?

Thanks for any help you guys can give.

PS I have had cars with a LWFW before. It's manageable, chatter wasn't THAT bad... but I don't want to go that extreme with this car. I want to maintain stock driveability, not gut the car for racing. It'll be an 18G, primarily daily driven car with an occasional track day.
 
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Old 01-04-2014, 09:45 AM
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Nope. One of the points of a dual mass is to stop the noise and vibrations.

So unfortunately going to a LWFW will cause chatter but its not that bad in my ears just depends how sensitive yours are!
 
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Old 01-04-2014, 09:59 AM
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There's the aluminum ones and a Porsche steel one that I have been told is suppose to be quieter then the aluminum ones ?
 
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Old 01-04-2014, 10:10 AM
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Is the steel one the 964 one?
 
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Old 01-04-2014, 10:14 AM
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if youre interested, i think i still have an aasco flywheel (it weighs about 8/9 lbs)... much lighter than the OEM 964 lwfw
 
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Old 01-04-2014, 10:31 AM
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Originally Posted by TXTurbo996
Is the steel one the 964 one?
Yes,,Kevin from UMW sells the whole kit
 
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Old 01-04-2014, 11:11 AM
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Originally Posted by Steve K ny
if youre interested, i think i still have an aasco flywheel (it weighs about 8/9 lbs)... much lighter than the OEM 964 lwfw
That's precisely what I DON'T want... I would like to have an option to lose a little bit of weight from the drivetrain if I'm going to be adding 20lbs extra with some aftermarket intercoolers, but I don't want an ultra light flywheel.

Originally Posted by johnspeed
Yes,,Kevin from UMW sells the whole kit
Excellent, thanks for the info!
 
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Old 01-04-2014, 11:13 AM
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I have a gt3rs LWFW and its not bad. I don't know how picky you are though. I expect a "race car" to make noises. Its a little noise to me though.
 
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Old 01-04-2014, 11:41 AM
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Old 01-04-2014, 02:10 PM
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Ha! I live in TX, I don't the a/c is ever off!

Well, I've already purchased the Sachs 2.5, which should work with the stock flywheel and doesn't require any conversion. Sigh. I guess I could go with GT2RS intercoolers and not add any weight to the rear.
 
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Old 01-04-2014, 02:48 PM
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Originally Posted by TXTurbo996
Ha! I live in TX, I don't the a/c is ever off! Well, I've already purchased the Sachs 2.5, which should work with the stock flywheel and doesn't require any conversion. Sigh. I guess I could go with GT2RS intercoolers and not add any weight to the rear.
GT2RS ICs are a great upgrade for a hot/humid place like Houston and easy install.
 
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Old 01-05-2014, 05:10 PM
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Anybody with a LWFW have stalling issues when pushing the clutch in from high rpm 3k+? One of my previous cars I raced but also street drove had an ACT light weight steel flywheel, no chatter but the RPM fell so fast after a rev or pushing the clutch it was like the ECU couldn't catch it and the car would stall. I was never able to tune it out and had to just get used to driving and not pushing the clutch in at a stop sign until it was almost at idle. Not sure id want to live with that in a mostly street car.
 
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Old 01-05-2014, 05:12 PM
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Originally Posted by King James
Anybody with a LWFW have stalling issues when pushing the clutch in from high rpm 4k+? One of my previous cars I raced but also street drove had an ACT light weight steel flywheel, no chatter but the RPM fell so fast after a rev or pushing the clutch it was like the ECU couldn't catch it and the car would stall. I was never able to tune it out and had to just get used to driving and not pushing the clutch in at a stop sign until it was almost at idle. Not sure id want to live with that in a mostly street car.
I have this problem and it gets on my nerves!
 
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Old 01-05-2014, 05:18 PM
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Originally Posted by King James
Anybody with a LWFW have stalling issues when pushing the clutch in from high rpm 3k+? One of my previous cars I raced but also street drove had an ACT light weight steel flywheel, no chatter but the RPM fell so fast after a rev or pushing the clutch it was like the ECU couldn't catch it and the car would stall. I was never able to tune it out and had to just get used to driving and not pushing the clutch in at a stop sign until it was almost at idle. Not sure id want to live with that in a mostly street car.
Your tuner should give you a LWFW specific tune. Kevin at UMW, for example, has versions of his tunes for both a DMFW or a LWFW to prevent the stalling issue. I'd talk to Kevin if your tuner doesn't offer that.
 
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Old 01-05-2014, 05:23 PM
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yes, your tuner should be able to take care of this.
when i had my 996, i had a UMW tune with their 964lwfw. the car only chattered when the a/c was on in the summer. probably the best street set up lwfw.
 


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