S65 Lightened Drivetrain Program
I have been looking at drivetrain modifications for winter upgrade projects and I've been interested in freeing up power from the S65.
The Lightweight Flywheel fits within that concept by freeing up horsepower, allowing much easier throttle blips for manual guys, and allowing faster pick up in gear.
Lightweight Flywheels will also induce slight noise and chatter at idle, something to keep in mind for mostly daily driven vehicles.
I have been hunting the European market for a lightweight flywheel and found many Nurb track tools sporting the TTV Racing flywheel setups.
You can learn more about my review and first impressions in my Orange Stripper build journal here.
About TTV Racing
TTV Industrial ltd is a family run business located in the East of England. TTV has been precision engineering for over 25 years, designing and manufacturing automotive parts for original equipment & motorsport, club racer to world championship.
The flywheels offered for BMW M cars use the same material, the same machines and same tooling TTV uses to manufacture products for Motorsport teams worldwide.
Why TTV uses Carbon Steel over Aluminum
There are no other technical and engineering benefits to using aluminum other than lower production costs.
Aluminium is a third of the weight of steel but it is also a third of the strength. You need 3 times as much of it.
Having 2 different materials bolted together is not ideal when the parts warm up and start to expand as the expansion rates are different putting components under stress.
Motorsport teams do not use aluminium flywheels are they are not reliable, the steel used for the friction faces tend to be low quality and wear out quickly when used with modern drivetrain friction materials.
2021 Product Update: New Nitride Heat Treatment
- Made in England
- CNC machined from a forged high carbon steel billet
- Balanced by TTV from the factory
- Available for MT and DCT transmission
- DCT: 5.6kg
- OEM: 9.0 kg (09+) 12.2kg (08)
- MT: 6.0 kg
- OEM: 12.5 kg / 27.5 lbs
- Hardware not included.
- The Manual flywheel suits the updated BMW Part Number 21 21 2283 820 / Clutch Part 21 21 2 284 034
- You need to get 9x new BMW flywheel bolts (11227520706)
- Engine starter alignment is done by matching the slightly enlarged bolt hole of the flywheel with the crank.