One of the Chch members of NZHondas (A skyline driver, rather than a Honduh driver actually) is organising a Dyno day. Currently it is looking like the 31st is the day, the 17th and 24th clashing with to many plans. Current price quoted is for $60 per car, unsure how many runs this would be for.
Skylines DownUnder and Southern Skylines have been invited too.
Details are available on the NZHondas forum, the organiser just asks you join the NZH forum and post your interest in the thread there to keep it all in one place rather than spread out around the internet in too many different places.
http://nzhondas.com/upper-south-island/ ... -chch.html