The record for the fastest standing mile speed ever clocked was recently set by Heffner Performance and Hoffman Motorsports when they recorded the Heffner Ford GT Twin-Turbo to have hit the one-mile marker at 266.938mph (429.595 km/h).
This world record, which has yet to be made official, is more than 17 mph (27 km/h) faster than the speed achieved by the same car at The Texas Mile earlier this month.
The latest mile run had occurred at the Miami Airport Runway event produced by Exotics Rally. The doubts are stemming from the sudden increase in speed.
Jalopnik said that the reason for the disparity is that the 1900 HP Ford GT was only delivering 26 pounds of boost at the Texas event while boost was turned up to 41 pounds in Miami. Drag strip fans say that the timing equipment malfunctioned, while there are some who think that the gear was intentionally altered.
Heffner boss, Jason Heffner has stated that the company was aware that whatever numbers achieved during the event will be deemed unofficial but that its purpose for attending was to compete against two of the other fastest one mile cars in the world on the same day at the same facility using the same timing equipment.
He asserted that the company holds the V Box data to prove the performance of its car. He asserts that at this fall's Texas Mile, the doubters will be at a loss for words.