"There is Richard, its called Production Sports Cars. There are even two levels of competition, 2F with limited mods and 2B where you can go further. But you still have to use the L series engine and no forced induction.
My old green car was still competitive over a championship in Queensland, and looking at the times of the current Queensland cars, I would be looking at picking up silverware if it hadn't met it's demise.
Only problem is you need deep pockets and a lot of cash to play in a car that is near 50 years old and be up the front. My S14 still owes me less than $15k for all the bits I have laying around and fitted. I just need the time to put it together, which is another couple of years off with my current work situation." Matt Ryeland.
Rather than clutter up the Bathurst thread here is a separate thread for anyone who is interested. In Q it's pretty well a MX5 benefit series so to compete is going to cost but any competition S30 is not cheap now, starting from scratch a Z33 or 34 would be cheaper but no one seems to have got one going well here, sourcing info and parts from the US would be the way to go rather than trying to reinvent the wheel locally. As for the S30 well it seems doable, if you want cheap racing then buy an Excel.