Originally posted by DemonSVT:
Laptop proven 136mph. The speedo read near 150!!! 
Can you say some bad error after 100mph... That was several seconds into 5th gear.
At 40 it's on
At 65 it's off by 1
At 80 its 2
at 100 it's 3-4
by 120 it's like 8.
it' was over 10 at 150ish
Stock tire sizes.Full agreed on that Demon...My speedo read 146 mph with only a few hundred more RPM to go, although I do have the chip for no redline. My speedo is 5 mph off in 4th gear at 80, so what do you reckon it is at 146??? My point excactly. Here you go...
As you can see....I guarantee this pic is at least 10 mph off....
