It looks like you apex turns 1 and 2 too late. You seem to not need to exit all the way out after the apex. If you apex earlier, you can be on throttle earlier and let the car track out all the way to the edge of the track.
Your line through turn 9 is right on.
I did 1:32's at Willow back in the 2002 Open Track Challenge, but we were having issues that day and swapped out the turbo for a brand new one after the day was over.
Sheehan Motor Racing