Originally Posted by bigad4x4
Originally Posted by TIFF
Dont go on what the clocks say............They are always wrong after 110-120mph
I did a GENUINE GPS 154mph at Bruntingthorpe proving ground for Performance ford
...Was a Norris Motorsport Stage 1 on my 3DR
Very true Tiff
thats an impressive top speed
Can u rember what your speedo was reading?
Mine was running standard wheels and tyres at the time so it was all as Ford intended......
Just before i braked after hitting a GENUINE
154mph the speedo was reading between 165 and 170...... Thats how far out they are. Well mine was.
But i think you only have a good 1.4miles to get your readings at brunters before you have to hit the brakes......... So on a private motorway it would of been a little more i think
When the Speedo hit 150 it was doing 138mph on the GPS......Just so others can gauge what they were REALLY doing