Lets talk flywheels
Thread Starter
Racer
Joined: Jun 2015
Posts: 284
Likes: 31
Lets talk flywheels
My 01 is in the shop getting all the common problems sorted out...RMS, IMS, AOS and all the other initials that go with it. Also replacing clutch/ flywheel. What are the pros/ cons of a lightweight flywheel?
I drive the car almost daily. I haven't done any track days yet bc I wanted to get it all recon'ed first. I do plan to track it though, but maybe only a few times a year.
I drive the car almost daily. I haven't done any track days yet bc I wanted to get it all recon'ed first. I do plan to track it though, but maybe only a few times a year.
Rennlist Member
Joined: May 2008
Posts: 5,544
Likes: 108
From: Northern NJ
Lightweight flywheels:
1. Can cause broken crankshafts unless you also add a harmonic balencer.
2. Can cause erratic idle
3. Cause transmission gear noise at idle.
4. Take a little more concentration in stop n go traffic.
1. Enable the engine to rev quicker from idle and when rev matching between shifts.
1. Can cause broken crankshafts unless you also add a harmonic balencer.
2. Can cause erratic idle
3. Cause transmission gear noise at idle.
4. Take a little more concentration in stop n go traffic.
1. Enable the engine to rev quicker from idle and when rev matching between shifts.
Rennlist Member
Joined: Feb 2015
Posts: 707
Likes: 20
I bought an aasco aluminium flywheel , but my Indy scared me with tales of broken crankshafts . He talked me into a single mass flywheel instead to replace the stock dual mass flywheel . The reasoning was smoother running and easier to live with , more robust than the stock dual mass unit , yet a bit more free reving .
It cost 1k CDN .
But there are rennlisters who love the aasco flywheel and I haven't heard of a case of an actual crankshaft breaking . Hopefully if someone has had this happen they will post .
If anyone is interested , I have an aasco still in the box I'd sell for 75% of what I paid for it from pelican .
It cost 1k CDN .
But there are rennlisters who love the aasco flywheel and I haven't heard of a case of an actual crankshaft breaking . Hopefully if someone has had this happen they will post .
If anyone is interested , I have an aasco still in the box I'd sell for 75% of what I paid for it from pelican .
Last edited by Vancouver996; Feb 4, 2016 at 02:23 AM.
Rennlist Member
Joined: May 2008
Posts: 5,544
Likes: 108
From: Northern NJ
I bought an aasco aluminium flywheel , but my Indy scared me with tales of broken crankshafts . He talked me into a gt3 type single mass flywheel instead to replace the stock dual mass flywheel . The reasoning was smoother running and easier to live with , more robust than the stock dual mass unit , yet a bit more free reving .
It cost 1k CDN .
But there are rennlisters who love the aasco flywheel and I haven't heard of a case of an actual crankshaft breaking . Hopefully if someone has had this happen they will post .
If anyone is interested , I have an aasco still in the box I'd sell for 75% of what I paid for it from pelican .
It cost 1k CDN .
But there are rennlisters who love the aasco flywheel and I haven't heard of a case of an actual crankshaft breaking . Hopefully if someone has had this happen they will post .
If anyone is interested , I have an aasco still in the box I'd sell for 75% of what I paid for it from pelican .
Last edited by fpb111; Jan 31, 2016 at 10:23 PM.
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Rennlist Member
Joined: May 2008
Posts: 5,544
Likes: 108
From: Northern NJ
Some interesting reading:
https://rennlist.com/forums/997-gt2-...l#post10816248
http://www.6speedonline.com/forums/g...-flywheel.html
https://rennlist.com/forums/gt2-and-...track-diy.html
Seems like there is more than one GT3 LWFW:
"Probably they use the same because the pseudo- LWFW double mass of the 997.2GT3 is light enough."
https://rennlist.com/forums/997-gt2-...l#post10816248
http://www.6speedonline.com/forums/g...-flywheel.html
https://rennlist.com/forums/gt2-and-...track-diy.html
Seems like there is more than one GT3 LWFW:
"Probably they use the same because the pseudo- LWFW double mass of the 997.2GT3 is light enough."
Last edited by fpb111; Jan 31, 2016 at 10:22 PM.
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Instructor
Joined: Nov 2013
Posts: 242
Likes: 1
From: Castle Rock, Colorado
I bought an aasco aluminium flywheel , but my Indy scared me with tales of broken crankshafts . He talked me into a gt3 type single mass flywheel instead to replace the stock dual mass flywheel . The reasoning was smoother running and easier to live with , more robust than the stock dual mass unit , yet a bit more free reving .
Instructor
Joined: May 2009
Posts: 138
Likes: 3
The Gt3 is is a different matter they had issues with over reving and the bolt shearing on the front pulley
the 996 is a different combo and the Aasco weight is almost 15 pounds vs the steel RS which is mentioned in this thread is 12lbs
the 996 is a different combo and the Aasco weight is almost 15 pounds vs the steel RS which is mentioned in this thread is 12lbs
Drifting
Joined: Mar 2015
Posts: 2,337
Likes: 434
From: Apalachin, New York
Yikes, I wish I saw this thread months ago.
I just purchased a center balanced package from Patrick Motorsports, LW flywheel, and sacks clutch & pressure plate.
Waiting for spring to have installed when doing IMS / RMS upgrade.
I have 2003 996 C2 Coupe 3.6L.
Already done is IPD compitetion plenum 82 mm, Evoms tune, Kline headers and 200 Cell X pipe, Tubi Style mufflers.
This is daily driver and occasional autocross, Drag & going to do PCA DE.
Also planning on doing RSS underdrive pulley.
Am I igniting my own engine destruction??
I just purchased a center balanced package from Patrick Motorsports, LW flywheel, and sacks clutch & pressure plate.
Waiting for spring to have installed when doing IMS / RMS upgrade.
I have 2003 996 C2 Coupe 3.6L.
Already done is IPD compitetion plenum 82 mm, Evoms tune, Kline headers and 200 Cell X pipe, Tubi Style mufflers.
This is daily driver and occasional autocross, Drag & going to do PCA DE.
Also planning on doing RSS underdrive pulley.
Am I igniting my own engine destruction??
Instructor
Joined: Nov 2013
Posts: 168
Likes: 0
From: Memphis TN
Yikes, I wish I saw this thread months ago.
I just purchased a center balanced package from Patrick Motorsports, LW flywheel, and sacks clutch & pressure plate.
Waiting for spring to have installed when doing IMS / RMS upgrade.
I have 2003 996 C2 Coupe 3.6L.
Already done is IPD compitetion plenum 82 mm, Evoms tune, Kline headers and 200 Cell X pipe, Tubi Style mufflers.
This is daily driver and occasional autocross, Drag & going to do PCA DE.
Also planning on doing RSS underdrive pulley.
Am I igniting my own engine destruction??
I just purchased a center balanced package from Patrick Motorsports, LW flywheel, and sacks clutch & pressure plate.
Waiting for spring to have installed when doing IMS / RMS upgrade.
I have 2003 996 C2 Coupe 3.6L.
Already done is IPD compitetion plenum 82 mm, Evoms tune, Kline headers and 200 Cell X pipe, Tubi Style mufflers.
This is daily driver and occasional autocross, Drag & going to do PCA DE.
Also planning on doing RSS underdrive pulley.
Am I igniting my own engine destruction??
Again, I'd ask them about it.
Mike