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Questions and answers about sports

How does a pro tree work?

4 min read

Asked by: Mike Gonzales

The first type which is mainly used by the NHRA Pro drag racing is called the Pro Tree. The Pro Tree is when all three amber lights flash simultaneously followed four-tenths of a second later by the green light ( green is when you gas the vehicle forward).

How do you read a pro tree?


At some random time. The three yellows will just flash. And five hundred seven day or five tenths of a second later the Green goes off so it's extremely fast. And you can't guess the light.

What is the delay on a pro tree?

A pro tree will light all three ambers simultaneously, with a four-tenths or five-tenths of a second delay between them and the green light. The last two lights then, of course, are the green and red lights.

How does a drag strip light work?

Before the green light comes on the system runs with a 4/10. Difference between the amber.

How do you beat the tree in drag racing?

Another thing to avoid is pulling in too far then backing up without moving forward again sometimes the starter will back you up for some reason or you may realize that you went in too deep.

What does 660 mean in racing?

660 FOOT TIMER



The 660 foot mark is the halfway point of a quarter-mile track. Your elapsed time is recorded. At some tracks, speed (in miles per hour) is also recorded.

What is considered a perfect light in drag racing?

(. 500 is a perfect light on a sportsman tree, . 400 on a Pro tree.) What this really means is that your front tire(s) left the stage beam .

What is a perfect reaction time in drag racing?

400 seconds is considered a perfect Reaction Time). What to Watch/Add One. Leave too soon and you “red light,” or foul and are disqualified. Leave too late and you may give your opponent a head start that you can’t overcome, even with a quicker and faster car.

How far is the Tree from the starting line in drag racing?

about 7 inches

When the front tires of a vehicle break the first light beam, the pre-stage beam, the pre-stage lights on the Tree indicate that the racer is about 7 inches from the starting line.

How does a delay box work?

“Delay Box” is a common slang term used in drag racing to describe an on-board timer which is a Transmission Brake Delay Timer. A transbrake forces the race car to remain stationary at the starting line, in gear, regardless of how much engine power is applied.

What is treeing in drag racing?

Definition: A solo run with no competitor in the other lane. Lingo: Christmas tree. You could also say: ‘Tree. Definition: The starting line light fixture that lets racers know when the car is properly positioned for a start and when to start.
1 мар. 1999

What tree does no prep Kings use?

One of the hallmarks of no-prep drag racing is the unique use of an instant-green Christmas tree — which as technical as it may sound, is really just a standard, every-day . 400 pro tree with all of the amber bulbs removed.

Why do drivers do burnouts?

Burnouts can help remove unwanted debris



Performing a burnout can help to remove any foreign matter or unwanted debris that may have collected on the tires before the race, particularly if the vehicle was coming from the pits.

Why is it illegal to do a burnout?

Reckless driving is described in the law as when a person drives “in willful or wanton disregard for the safety of persons or property . . .” At least one court in Washington has concluded that doing burnouts in a location where there is the possibility of other people, even if there were no other people actually

Does doing a burnout ruin your transmission?

Does doing a burnout do any damage to my car? Yes, if done for too long your car can overheat. The transmission and clutch can overheat. If you have an automatic and you’re holding the brake for too long, it will wear out.