we built my combo to run 9.7s first few times i had it to the track with the timming at 35-36 after tunning the carb and suspension the best it would run was in the 9.9s.i spoke with Ryan first thing he asked is where i had the timming when i told him he said go back kick it up to 40-42 so i did and the car instantly went from 9.9s into the 9.7s with a best of a 9.64.then he told me the story about a dyno session where they where dissapointed of the power a certain indy headed combo made until he tried playing with the timming and picked up 75hp with a 5degree increase which i kinda believe after how much i picked up at the track.