Reaction time is the time it takes from breaking the guard beam to the start beam. When the start beam is tripped, the ET timer starts. If you break the start beam before the green light comes on you get a red light. The trick is to break the start beam thousands of a second after the green light comes on.
If test and tuning, as mentioned above, you can sit on the line for as long as you want. The timer won't start until you break the start beam. But in a bracket race RT means everything since the margin of victory also accounts for how much reaction time you have.
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Follow my racing progress on
Stephen's racing page
and check out the
race car
87 IROC-Z SuperPro ET Bracket Race Car
461 naturally aspirated Big Block (times are for the current engine)
Best ET on a time slip: 11.447 altitude corrected to 10.99
Best MPH on a time slip: 119.42 altitude corrected to 124.86
Altitude corrected rear wheel HP: 493
Best 60 foot: 1.586
Racing at 3500 feet elevation with a typical race day over 5000 feet density altitude!
Member of the
Calgary Drag Racing Association
87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley