It seems Helix who make pretty good clutches are going into manufacture of lightened flywheels. Looking at getting one to fit at same time as clutch as it makes sense and wont cost anymore in terms of labour.
They will make them if a minimum of 5 people are definately interested. Reline Motorpsort are the company I asked and they said the following:
These flywheels would be made out of Aerospace grade
aluminium, with a high carbon steel friction surface and steel ring
gear. They would be pre balanced and weigh in at around 4kgs. Likely
price would be about £300 - £330 inc VAT depending on the design of the
original.
By reducing weight you reduce the moment of inertia, meaning that the engine will spin up faster, most noticeable at low revs. This is normally where 16v engines struggle as they are off cam. I run such a flywheel on my
Honda with great results. In addition to low rev pick up, being balanced
to very high levels (though to do it properly the cam, flywheel and
clutch all would need to be balanced as one unit, this is usually only
done on race engines) the engine is far smoother at high revs and
therefore more reliable and can allow a raising of rev limit. As revs
mean power this is no bad thing.
If anyone is interested either post here or get in touch with Tim at Redline motorsport:
mailto:tim@redlinemotorsport.co.uk">tim@redlinemotorsport.co.uk
I want one so only need another 4 minimum peeps to get some made.
