Re: I could really use a dyno (rollie)
The Gtech has been proven to be accurate but for ardguement sake... lets just agree for a second they are right on and go with the published tests.
they will measure consistently and nobody can argue that. Do the tests on the same day on the same road on the same gas and you should know then what percentage of a gain you are getting. The money saved from doing all the dyno runs may be enough to buy one. IMO, it is at least close enough to justify one and you don't have to pay more money everytime you need to use it.