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.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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