Originally Posted By an8sec70cuda
Originally Posted By Spaceman Spiff
Originally Posted By an8sec70cuda
Originally Posted By MoparBilly
The little secret they don't want to mention is that it also increases MPH readings 3-5 mph, so they can brag about how much more Horsepower they have.

How does it do that? If the cones/beams down track are all the same height (lower than the stage beam), how does the extension make the MPH faster? I understand the ET being slightly quicker b/c the distance travelled is thrown off w/ the extension.


MILES PER HOUR TIMER
Also known as the speed trap, this timer is located 66 feet before the finish line. It records the car’s average speed between it and the finish line. This is the mile per hour figure on your time slip.

So, if the car got there sooner, with the extension, would it fool the timer into a faster speed?

My understanding is that the MPH is measured on how long it takes the car to break the last two beams at the end of the track. The extension breaks these two beams, unlike the stage beams which are broken by the tires. With an extension, the car will technically get to the last two beams quicker, but it will not change the speed at which it breaks both of them.


MPH will be faster if a driver can break the beams with the front tires but hit the brakes and dip the nose for a stripe taker or spoiler to trip the last MPH beam, which is also the finish line/stop ET. They wouldn't be losing much actual forward momentum, but it can dip the front with soft springs/shocks.