Adding Flywheel Inertia
Removable OE flywheel weights
Each OE ring weighs 304 grams, has an OD of 103 mm, an ID of 64 mm, and is 8 mm thick. There is also a locating feature that is 68 mm in diameter and 2 mm tall. Six 6.1 mm holes are equally spaced on a 79.5 mm bolt circle.
By my calculation, each ring has an approximate MoI of 588 kg*mm².
Tungsten-copper flywheel weight with ID locating feature
Left, W80Cu20 Flywheel weight. Right, OE Flywheel weight
The Machining Process
0.187" pilot hole
After mill-work, prior to lathe finishing
Finished tungsten-copper flywheel weight mounted in place.
Even More Inertia!
Both tungsten-copper flywheel weights installed.
Purple trace: throttle position. Yellow trace: motor position sensor
Hole Saw Trick
Side views compare the standard flywheel weights with my copper-tungsten versions.
I think the substantial increase in inertia accelerates clutch wear and I will be experimenting with the 10mm thick disk alone in 2024.
This assembly weights 3126 grams (1 kg more than stock).