Funny you mention that Harry, i just PMed Darren regarding each of his cars at the Gatton Sprints so i hope he doesn't mind me posting up this excerpt:
"Yeah 37.6 is my best in the GTR, I've only run the Onevia on 215/45/17 Feddy's and it ran 40 flat or there abouts on those, 180SX would be around the same times as GTR on proper semi's but not any quicker seeing as it wouldn't get off the line as hard but would handle better."
I'm not sure exactly what each of his cars have done, i just asked him for a quick summary.
I'm not aiming to win these things, but i'd love to be competitive, say in the top 15-20%. I think i'd be more satisfied being at the top of my class than having a fractionally faster overall time, but being lower in my class.