This is the only aluminum flywheel to by designed and made in the UK for the Cooper S (all the others being US made). Here is a brief outline of spec:-
See the quality….
6082 T6 Alloy used.
This is the highest grade 6000 series alloy available, being both stronger (with higher resistance to fatigue) AND lighter in weight than 6061 T6 spec alloy used by others.
CNC machined to the closest tolerances, Giving smoother operation and less vibration.
GTT Stepped clutch location dowels, making it impossible for them to fall out!……We had an issue with another brand alloy F/W, one dowel dropped out, wrapped its way around outside of F/W and smashed 2 big holes through the sides of the gearbox causing oil to leak everywhere.
Quieter starter operation…..We found that the starter ring gear on another brand did not have the exact original gear teeth form. Similar but not quite right, the result on 2 samples was noisy starter motor operation. GTT ring gear uses identical tooth form to the OEM dual mass item. Also the GTT gear is thicker than other brands to give more contact area mesh to the starter motor gear for longer gear life. This is possible without any increase in overall weight due to the superior spec and lighter weight 6082 T6 alloy used for the flywheel.
The Advantages of Light Weight Alloy Flywheels over Light Weight Steel Flywheels ! (Magazine feature text)
5) Weight approx 4.5 kg!!
6) User replaceable friction plate. GTT Flywheel potentially lasts forever. Material chosen for its very high co-efficient of friction, more grip & less slip.
7)Deeper tapped holes with longer bolts to secure clutch pressure plate to the F/W. *
8)Starter ring gear uses 6 bolts securing ring gear to the F/W. Most use just 3 (that are known for the ring gear to slip and damage flywheel beyond repair!), ours is designed to hold together even under the most extreme power and usage.
9) Designed and built by GTT in the UK!
10) Alloy is lighter / stronger& dissipates heat better than any steel alternatives.so you should forget solid steel flywheels for high performance applications.
11) GTT Stepped clutch location dowels, making it impossible for them to fall out!.
12) As we make it all the service parts are held in stock by us for a fast cost effective service.
New V2 Features:
V2 Ring Gear… Even Higher spec tough steel! for an even longer life/protection against failing starter motors.
Higher Spec Friction Plate & Ring gear fixings
Comes complete with 8x new flywheel to crankshaft bolts……
New clutch cover bolts (included with clutch kits)
Fits: Gen 1 R53 & R52 Cooper S (also JCW / GP1)
Important Notes: Only Manual Gearbox Models, must be used with a sprung centred clutch….(NOT included) see our kits below….
Note: we highly recommend fitting a new starter motor when fitting to avoid any issue …Only use high quality OEM Starter motors! (cheap aftermarket, pattern and recons can cause many issues, they crack and lose alignment) poor quality aluminium has casting porosity and cracks.
Starter Motor issues article MUST READ! https://www.gtt.uk.com/4858-2/
Videos: GTT R53 Light Weight Alloy Flywheel Advantages V2
GTT Lightweight Alloy Flywheel and GTT Camshaft Demo Part 1 & 2