Ya know I think thats the one thing that bothers me about runs on the complex string... the consistancy needed to have good racing data.
If you run cxs and then run again, chances are you will get a better time, and for guys like me who aren't all that fast to begin with, everything is compounded because I never get a great lap in the first place, so every lap after has atleast one spot where it can catch up or fall behind.
Other tracks... you can nail the lap up to T2 and then ride it out conservatively only to end with a good lap, but on cxs, you can never let up or screw up... either one and your past lap will catch you. Or for that matter, if you don't do either, you will beat your past lap, once again setting a new goal for yourself that will be nearly impossible to continue perfecting.
I guess what Im trying to say is this... (very simply)
CXS is so long that you can always find a way to make up time on a lap. (unless it is that final lap you plan to turn in.

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Anyway, Im gonna run some today, so I will be back later with results...
btw, ran a vette with the same pwr as the r-tuned skyline and it pulled in a full 1.5 seconds faster on similar laps. (both still have 2 seconds worth of cleaning up to do.

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Later.