I've been looking for my saved data files, but it looks like there might have been an IT issue when I've been transferring data around. I'll keep looking for it though.
Here is my preliminary analysis from the posted graph.
- looks like you like turning right more than left as the average lateral G are slightly less on left turns
- definitely don't drive the high speed turns to the limit, lateral G falls proportionally as speed increases
- looks like the ultimate lateral grip with the current setup is 1.1-1.2 G which should translate into a safe high speed turn goal to 1-1.1 G
- you're overbraking into the Kink, Duck's Head, guessing top of the Ridge into Spoon, and 4left. You can tell by the big velocity dip before the corner and hard acceleration through the momentum corners.
- there are no longitudinal G's shown, but if you should be peaking at about 1G at the end of Rocky Road and 4left
- also guessing from riding with you and by the sharpness in the lateral G line on slow corners that the friction circle graph will show a triangular shape from slow turn in and little braking zone turn in blending.
The primary take away is to work on controlling the control entry speed into high speed corners and upping the cornering speed to take advantage of the available grip. A typical thing for most people. I'm estimating that you would probably gain 2 seconds with little additional risk and no over-driving, just a driver confidence adjustment. The first thing to try is to ease up on the braking before the high speed corners, i.e. Kink, Duck's Head, Spoon entry and 4left. Try to get the turn in entry to be 5+ kph above the lowest corner speed. Say around 140 kph for the Kink for example. If you can accelerate out of a momentum sweeper you're giving up "area under the velocity graph" which will significantly improve the average lap speed, which translates to lap time. Those sweepers should feel like scrub only enough speed to initiate the turn and then maintain it to the sweeper exit. It is worth extending the slow down zone with lighter braking or throttle lift to be able to have better speed control into the sweeper.
Next thing to do is to up the absolute corner speed to get the lateral G's up to around 1G. That should be around 5 kph per 0.1G lateral increase. Big disclaimer, this is just an estimate from experience. If you really want to, it can be theoretically be calculated for each corner.
Secondary thing, is to get more assertive on the turn in and blend it with the hard braking in the slow corners. You'll be able to see this better on the friction circle graph.
The data logger stuff is very good for maximizing the car capability. What it doesn't show too well is the best line and making the proper trade offs.
'02 blk S2000 ---> still driver limited ;)