Anyone know of a place in Virginia that will calibrate and certify speedometers?
10-20-2010, 05:02 PM
#16
Nordschleife Master
I have found that at LEGAL highway speed the speedo is about 5-7 mph off. I always cruise at 72 in a 65 which is really cruising at about 66/67. My portable GPS unit reports speed so I can verify it that way. I have also verified my speed by holding it constant for 1 mile and using a Tachymeter.
10-20-2010, 05:13 PM
#17
Burgled
Rennlist Member
Rennlist Member
My 996TT is 3 mile higher then actual speed. I see it on the GPS and the road side radar speed signs. My 964 id dead on.
