Would it be worth having a shop machine my a15 flywheel to make it lighter?
I've seen this on ebay Here but I remember someone somewhere telling me an a12 flywheel is more suited to the street, and the 700+ price on that makes me want to vomit a little.
If so, is there anyone selling an a12 flywheel around?

IMO, the chrome-molly units look fancy and all, but don't offer the performance edge over a billet alloy unit [with chrome-molly steel insert.

The ring gear on the flywheel [in the link] is also an integral part of the unit, and if you were to damage the ring gear in anyway, as a consequence the whole flywheel becomes somewhat useless. A throw away item.

The billet alloy units also offer the performance edge with improved thermal dissipation properties, but drawing heat away from the friction surfaces. Its basically a heat sink for your clutch assembly.

If your on a budget, but are looking for a little performance edge for street duties, get an A12 cast flywheel lightened.

AASCO Motorsport in the US make and supply alloy flywheels for Nissan /Datsun A-series.

cheers man

I have used both alloy and steel fluwheels on my racecars
Both come in about the same weight funnily enough

I prefer the steel
I had a big overrev on a downshift and spat the alloy one off the back of the crank
Destroyed the mounting holes on the flywheel when it bounced around on the bolts
Kinda my fault anyway
I saw one on ebay made from steel but no bolt holes done yet for the clutch... won the auction at about $31 from memory (many years ago)
Had it lightened and drilled for my Toyota clutch and never looked back

So personally...I'd go steel