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 . 031 seconds after the green light came on.
What is a perfect light in drag racing?
500 seconds) delay until the green light comes on, a . 500 reaction time is perfect. (In the same way, the four tenths delay of the Pro Tree makes a . 400 a perfect light on that one) Now, the reaction timer stops when the car leaves the starting line.
What is considered a good reaction time drag racing?
The milliseconds that elapse between the light turning green and the driver starting his run (when the E.T. clocks begin) is his reaction time. A quicker and faster car can lose a drag race if the driver’s reaction time is too slow. … 400 seconds is considered a perfect Reaction Time).
What is a perfect tree in drag racing?
SPORTSMAN TREE (or more often called “full tree”) is where each amber turns on then off in a sequence, starting at the top and ending on the green. You could also put “instant green” style heads-up racing in there too as the third type. This style is popular at outlaw and no-prep events.
What is a good 60 foot time in drag racing?
Most street-tired cars have 60 foot times around 2 seconds. 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 does it mean to red light in a drag race?
Also known as a red-light. When a vehicle leaves the starting line before the green light, indicated by the red light on the Tree. When a foul start occurs in eliminations, the racer is eliminated from further competition at the event (unless his or her opponent commits a worse infraction).
Why do drag cars have skinny front tires?
Skinny Tires Up Front
A decision many drag racers make is to do what is called “staggering” or running skinny tires at the front of the vehicle to reduce weight and friction while installing wider or stock tires at the back to help with grip, control, and faster acceleration.
What is a good reaction time?
The average (median) reaction time is 273 milliseconds, according to the data collected so far. In addition to measuring your reaction time, this test is affected by the latency of your computer and monitor. … While an average human reaction time may fall between 200-250ms, your computer could be adding 10-50ms on top.
How does a delay box work in drag racing?
A delay box delays the launch of a drag car using an electric signal that holds the trans-brake with hydraulic fluid pressure. During a race, a driver releases a button that internally countdowns the electric signal until it releases the trans-brake to almost a perfect light.
How do drag racing trees work?
Modern drag races are started electronically by a system known as a Christmas tree. … The “Standard” tree will light up each large amber light consecutively with a . 500 second delay in between them, then followed by the green light after another .
What does Protree mean?
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). … The Sportsman Tree is used for exhibition, Street Legal Drag events and other non-Pro NHRA events (Dragsters, Funny cars etc.).
How far is the Christmas tree from the starting line?
When the front tires of a vehicle break the first light beam, called the pre-stage beam, the pre-stage light on the Christmas Tree indicates that the racer is approximately seven inches from the starting line.
What is the best tire pressure for drag racing?
ET Drag and ET Street
|Vehicle Weight||Tire Size||Air Pressure|
|Under 2,500 lbs.||Over 32″ dia.||5 psi and up|
|2,500 – 3,000 lbs.||Under 30″ dia.||10 psi and up|
|2,500 – 3,000 lbs.||30″ – 33″ dia.||8 psi and up|
|2,500 – 3,000 lbs.||Over 33″ dia.||5.5 psi and up|
Why do drag cars lift up?
It’s because the shape of the car uses Bernoulli’s principle: the difference of pressure between the air above and below the car causes a net upwards vertical force which increases when the car goes faster.
What causes tire shake in drag racing?
But probably the most common cause of tire shake is excessive launch rpm, improper clutch clamping force or not enough first-gear ratio.” A first gear ratio that is too high numerically produces a mechanical advantage over the tire.