Quote:
Originally Posted by CSG Mike
Can you list all of the speeds you see at your track for each braking zone? E.g. 115 to 40, 60 to 40, etc? Also, what is the length (time) of your laps, and what kind of tires are you using?
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Track map, It is one of my favorites with lots of elevation change
http://www.atlantamotorsportspark.co...n_%20track.pdf
According to Harry's Lap Timer and the 1Hz GPS on my phone, my best of the day was a 1:39.35, By the end of the day I was consistently running in the low 1:40s with a number of laps breaking into the 1:39s. I had 5 25 min sessions, first lap of each was at a less intense pace to warm everything up.
T1 and T6 at AMP have the hardest braking zones. T1 is a 5th to 2nd downshift, and T6 is 4th to 2nd.
T1 I was going into the braking zone at 110-115, My speed on the straight leading into it kept getting faster as I learned the track and got brave enough to not lift on T15/16. Exit of T1 was 30-35mph. I felt I could carry more speed on the exit however, I found myself driving to track-out instead of ending up there naturally.
For T6 going into the braking zone was more varied as I was trying a lot of different things with the T4 carousel turn before it. Early in the day I was topping out 3rd gear when I got on the brakes, later I was into 4th, 80-85mph. Exit was 30-35 mph.
The other braking spots are:
T3, 4th to 3rd downshift, 75 in, 45 out
T10, stay in 4th, 85 in, 55 out
T11, 4th to 3rd downshift, 60 in, 40 out, I could have carried more speed here.
and a quick stab at T12 to settle the car and help turn-in.
Speeds are from HLT, but i'm not sure how accurate they are. The speedo seemed to be 5mph faster than the app indicated. The numbers are pulled from my best lap.
I am on Direzza ZII star spec in 235/40/17 size. Tires were on their 2nd track day and feeling pretty good.
ATL BRZ has some good video of the track.
http://www.ft86club.com/forums/showthread.php?t=13157