Did it or didn't it? Heffner Performance is claiming a new standing mile record speed, but some are crying foul. The story inside.

Florida-based tuners Heffner Performance and experts at Hoffman Motorsports have allegedly set the world record for the fastest standing mile speed ever clocked.  Although unofficial, the Heffner Ford GT Twin-Turbo hit the one-mile marker at 266.938mph (429.595 km/h).

That is over 17 mph (27 km/h) faster than the speed achieved by the same car at The Texas Mile earlier this month.  The new mile run took place at the Miami Airport Runway event put on by Exotics Rally.

It is the dramatic increase in speed that has left many shaking their heads and wagging their fingers. However, according to Jalopnik.com the 1900 HP Ford GT was only pumping 26 pounds of boost at the Texas event while boost was turned up to an astonishing 41 pounds in Miami!

Drag strip fans are claiming that the timing equipment malfunctioned, while others have suggested that the gear was intentionally altered.

To put circumstances into perspective Heffner boss, Jason Heffner has stated, "With regard to this weekend's event and concerns about the timing equipment I do not have a lot to say. Prior to attending this weekend we were aware that any numbers obtained during the event may be considered "unofficial". The purpose of attending this event was to race 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. At the end of the day we had the fastest time recorded and we have V Box data to verify the performance of our car.

Anyone that has doubts about the numbers posted for our car from this weekend will be at a loss for words once this fall's Texas Mile takes place, I personally guarantee this and I hope to see you guys there."

Until then, you can watch video of the run right here.  Let us know your opinion in the comments below.

Heffner Ford GT allegedly crushes standing mile world record with 266.94 mph in Miami [Video]