(COLDSTONE1298 @ Mar. 18 2007,17:58)
(Shanling @ Mar. 18 2007,14:48) Had a run with a Porsche. dusted him easily and the speedo was just past 160 when I glanced at it and backed off of the throttle. When I stopped later, I checked my GPS and it read 134 as my top speed. Error rate is very high on these.
A GPS isn't always dead on perfect accurate either. I'm betting you were doing 150ish or so.
I have one of those lil yelow gps budget units. Not bad but not the greatest out there. I've ran to a speedo indicated 170 and the gps read 159mph. Pretty accurate though the gps has shown it can be weird at times. Did 160 once and the gps only showed 106mph. Ran 110 another time and the gps showed 140.
Funny things can happen with that signal. Best to make sure your batteries are proper too.
This was all on secret test tracks too btw.