I'm currently in discussions with
http://ttvracing.com/ for having a lightweight steel flywheel made.
I'm sending them my original flywheel and clutch so they can get back to me with a quote for having a custom one made. They can make them to 3kg or less. An 'off the shelf' flywheel of them (one that they already have a design for) is about 300 GBP. They are going to get back to me with a quote as soon as they receive my original one. I suspect that it will not be much more than their other prices.
There are some advantages to their product:
- all steel, dynamically balanced, integral ring gear
- European based (a lot of the expense with having something made in the US for me comes from shipping and import taxes)
- No minimum order
I'll post here when I get more information from them.
Kind regards,
Serge
PS: they also have a design for a flywheel that will fit our engine, but for a 7.25" racing clutch cover (which adds a substantial amount of money to the clutch setup).