I'll post a more detailed report on yesterday's club trackday at Wakefield Park once the official results are available (I forgot to take photos of the screens this time
). But for now I wanted to unload.
I was really disappointed with my times yesterday. Yes, I had heaps of fun sliding around all over the place, but a best lap of 1:18.9ish doesn't cut it against my street tyre PB of 1:17.00. At the time, I was inclined to lay blame on 1) the brand new Adrenalins, and 2) the strong westerly winds (steady 40km/hr, with 50-60km/hr gusts) and warm humid weather (25C and 50-60%RH). But I have to admit that I was worried that my car might have also been down on power. I had to put my mind at rest, so I compared my PBox data against previous runs:
WP110220v101205v091206 by
Guran5, on Flickr
red = 20 Feb 2011 new tyres - set 3 (1:18.9)
blue = 5 Dec 2010 worn tyres - set 2 (1:18.28)
green = 6 Dec 2009 worn tyres - set 1 (1:18.11)
This shows that I was actually a fair bit quicker down the main straight yesterday than on those two previous days; same with the run up the hill to turn 3. However, the run down the hill towards the fishhook and on the back straight, were much slower. This suggests that the main problem yesterday was that strong westerly wind. I haven't done much analysis of the corner speeds, but there doesn't seem to be a dramatic difference from the new tyres.
So that's a relief - my car doesn't seem to be down on power afterall.