Turns 8 and 9 at Willow Springs International Raceway are (in)famous.
Turn 8 is an unbanked (flat) very high speed right hand sweeper. The lead-in to this turn is very fast and the big sweeper allows Boxster's to carry 120-130mph easily all the way through. The challenge in Turn 8 is to trust the car while its squirming around and keep your throttle foot flat on the floor.
Turn 9 is a decreasing radius right hander with a dip at the apex. Typically you'll downshift and slow a bit in the short chute after Turn 8 in prep for entry into Turn 9. After turn entry, you're full on the gas well before the late apex.
The challenge is to slow enough to avoid running out of track on exit but don't slow too much or you'll kill your front straight speed - and do all of this without any decent landmarks to help in selecting a turn-in point. Consistency in this turn takes a lot of practice and many drivers run out of talent and end up in the sand at corner exit!
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