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freddie44
Albert Park


Joined: 20 Aug 2009
Posts: 1703
Location: Chelsea

2007 Porsche 997 GT3

PostPosted: Wed Dec 04, 2019 11:01 am    Post subject: Single mass flywheel Reply with quote

Thinking to upgrade to a single mass flywheel at clutch change time next year but would really like to hear one in situ before I commit.

Anyone near West London, Berks area with a single mass in a 996/997 GT3 I could come and stick my ear to?

Anyone had experience with the swap from dual to single?

I'm only cautious as I like to use the GT3 as an all-rounder not just tracks (but also tracks)

Cheers
 
  
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crash7
Hockenheim


Joined: 28 May 2011
Posts: 707



PostPosted: Wed Dec 04, 2019 5:08 pm    Post subject: Reply with quote

I have one fitted to a 996 C2 and am in Berks if it helps.
 
  
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freddie44
Albert Park


Joined: 20 Aug 2009
Posts: 1703
Location: Chelsea

2007 Porsche 997 GT3

PostPosted: Thu Dec 05, 2019 11:11 am    Post subject: Reply with quote

Brill, PM'd you
 
  
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Diggermeister
Montreal


Joined: 26 May 2015
Posts: 502



PostPosted: Thu Dec 05, 2019 11:48 am    Post subject: Reply with quote

Interesting to hear your findings. It's an upgrade I'd often wondered about.


FWIW I had the Guards, Cup style diff ramps put in my LSD earlier in the year and it was a definite improvement. Even in my hands.
 
  
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Kryton
Nürburgring


Joined: 05 Mar 2005
Posts: 424



PostPosted: Thu Dec 05, 2019 4:20 pm    Post subject: Reply with quote

Think you'll regret fitting one if your car's a daily.

I had a ride in a GT3.1 single mass and the bag of nails sounds was horrendous.

The GT3.2 had a twin plate and that bag of nails sound had gone thank god!
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2019 718 Boxster
2020 Weissach GT3 RS
 
  
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Stuart
General
General


Joined: 16 Sep 2007
Posts: 5096
Location: Waterworld

2004 Porsche 996 GT3 Mk2

PostPosted: Fri Dec 06, 2019 9:02 pm    Post subject: Reply with quote

One of the best things you could do for the GT3. Like everything it soon becomes the norm, I used mine in central London traffic all the time, not a problem. Noise is slightly increased but again you get used to it and certainly adds to the visceral GT experience.
 
  
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freddie44
Albert Park


Joined: 20 Aug 2009
Posts: 1703
Location: Chelsea

2007 Porsche 997 GT3

PostPosted: Sun Dec 08, 2019 8:15 am    Post subject: Reply with quote

Great to hear Stu Thumb

Going to sample next week
 
  
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Roro
Long Beach


Joined: 01 Oct 2010
Posts: 6451
Location: Berkshire


PostPosted: Sun Dec 08, 2019 7:08 pm    Post subject: Reply with quote

Subscribed Cool
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2007 997.1 GT3
2017 F87 M2
 
  
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Senoj
Zolder


Joined: 23 Jan 2006
Posts: 5259
Location: Oxfordshire


PostPosted: Sun Dec 08, 2019 7:38 pm    Post subject: Reply with quote

It’s fab for improving throttle response. Not massively noticeable in gear as the drivetrain is loaded up though intensely noticeable when h an t and blipping for a downshift.

Only comment would be that pedals on 997 are not brilliantly placed for H and t on the road. Track is fine but road driving it’s harder to get the brake pedal down far enough unless performing a massive stoppie.

Thumb
 
  
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freddie44
Albert Park


Joined: 20 Aug 2009
Posts: 1703
Location: Chelsea

2007 Porsche 997 GT3

PostPosted: Mon Dec 16, 2019 1:18 pm    Post subject: Reply with quote

Thanks for comments!

Having been able to sample a GT3 with a SMF fitted I'm 100% sold.
No real downsides and adds another element of fun. Defo going for it Thumb
 
  
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Diggermeister
Montreal


Joined: 26 May 2015
Posts: 502



PostPosted: Tue Dec 17, 2019 11:47 am    Post subject: Reply with quote

freddie44 wrote:
Thanks for comments!

Having been able to sample a GT3 with a SMF fitted I'm 100% sold.
No real downsides and adds another element of fun. Defo going for it Thumb
Any idea of budget yet?

Are you doing this because the clutch needs changing anyway?
 
  
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crash7
Hockenheim


Joined: 28 May 2011
Posts: 707



PostPosted: Tue Dec 17, 2019 1:48 pm    Post subject: Reply with quote

You will need.,

Flywheel, TTV / Aasco - I have a contact if anyone is interested.

Uprated sprung clutch, - Sachs.

Also worth going for a performance pressure plate - Sachs

Replace the release and spigot bearings (Sachs & Porsche) while your in there as well as new flywheel bolts. (ARP)

Circa - £1600 on parts.
 
  
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NXI20
Paul Ricard


Joined: 02 Feb 2008
Posts: 3406
Location: South Bucks

2004 Porsche 996 GT3 Mk2

PostPosted: Tue Dec 17, 2019 4:58 pm    Post subject: Reply with quote

freddie44 wrote:
Thanks for comments!

Having been able to sample a GT3 with a SMF fitted I'm 100% sold.
No real downsides and adds another element of fun. Defo going for it Thumb


Use the 964 flywheel & the 4.0L clutch pack. Stick to Porsche stuff throughout the job, release bearing, tube & fork all worth changing while you're in there.
_________________
Nick

2004 GT3 CS in Atlas Grey with too many mods to list!
1995 993 GT2 recreation in Polar Silver
2010 GT3 CS in Riviera Blue Smile
 
  
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freddie44
Albert Park


Joined: 20 Aug 2009
Posts: 1703
Location: Chelsea

2007 Porsche 997 GT3

PostPosted: Thu Dec 19, 2019 10:03 am    Post subject: Reply with quote

Thanks Nick and hope you're well!

Need to get the diff checked too - cup plates?
 
  
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NXI20
Paul Ricard


Joined: 02 Feb 2008
Posts: 3406
Location: South Bucks

2004 Porsche 996 GT3 Mk2

PostPosted: Thu Dec 19, 2019 11:45 am    Post subject: Reply with quote

Yes, standard ones are chocolate
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Nick

2004 GT3 CS in Atlas Grey with too many mods to list!
1995 993 GT2 recreation in Polar Silver
2010 GT3 CS in Riviera Blue Smile
 
  
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Diggermeister
Montreal


Joined: 26 May 2015
Posts: 502



PostPosted: Thu Dec 19, 2019 4:09 pm    Post subject: Reply with quote

crash7 wrote:
You will need.,

Flywheel, TTV / Aasco - I have a contact if anyone is interested.

Uprated sprung clutch, - Sachs.

Also worth going for a performance pressure plate - Sachs

Replace the release and spigot bearings (Sachs & Porsche) while your in there as well as new flywheel bolts. (ARP)

Circa - £1600 on parts.
So if/when you need a clutch, a very opportune time to make the upgrade then.

freddie44 wrote:
Thanks Nick and hope you're well!

Need to get the diff checked too - cup plates?
FWIW, got my Guards plates from JZM as I couldn't find any OEM motorsport ones at the time I was buying.
 
  
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-ollie-
Trainee


Joined: 26 Sep 2018
Posts: 97



PostPosted: Sun Dec 22, 2019 6:26 pm    Post subject: Reply with quote

If fitting a LWFW to a non RS 997 GT3 it is imperative you also fit an OEM 997 RS crank damper at the same time.

If you do not, the non RS damper will be out of balance with the rest of your now modified rotating assembly, the bolts will vibrate lose and the damper will fall off.

I know this for fact, as I did exactly that. Lost power steering, alternator etc and had to get recovered.

Fitted the RS damper, been perfect for 1000's of miles on circuit since.

Learn from my mistake! Thumb

RS & non RS dampers are different - they look different, have a different part number and are even a different colour for this reason alone - you need it.
 
  
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freddie44
Albert Park


Joined: 20 Aug 2009
Posts: 1703
Location: Chelsea

2007 Porsche 997 GT3

PostPosted: Mon Dec 23, 2019 3:05 pm    Post subject: Reply with quote

Thanks Ollie - message understood Grin Do you know the two different part numbers?

Yes Digger good time to make the change Thumb
 
  
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Cheib
Spa-Francorchamps


Joined: 20 Feb 2016
Posts: 334



PostPosted: Fri Dec 27, 2019 10:16 am    Post subject: Reply with quote

There’s a bit on the Sharkwersk website about it.

https://www.sharkwerks.com/transmission/p4056-porsche-lightweight-flywheel-clutch-upgrade-kit-for-996-997-997-2-gt3-rs-4-0-964-PORT154

I believe RPM have some experience of doing this....might be a worth a visit just to pick their brains.
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Cayenne S Diesel
Ruby Star 718 Boxster - Mrs Cheib's car
Lava Orange 991.2 GT3 Manual
Sport Classic Grey Macan Turbo PP
 
  
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-ollie-
Trainee


Joined: 26 Sep 2018
Posts: 97



PostPosted: Fri Dec 27, 2019 9:49 pm    Post subject: Reply with quote

freddie44 wrote:
Thanks Ollie - message understood Grin Do you know the two different part numbers?


Laughing Apologies, I was keen to make sure it was personal experience I was referring to rather than learned internet hearsay Thumb

I don't know the part numbers, but a quick call to Matt @ Fearnsport and he'll be able to tell you Cool

Enjoy your noisy rattly flywheel, it will sound totally broken when the 'box is hot at idle at traffic lights. Great for making passengers thing your car is a hound, but even better for heel & toe downshifts/rev matching on circuit thumbsup

Cheers

Ollie
 
  
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