cliffyk

If you learn to do it yourself you don't need a "dyno tune", all a dynamometer is is a tool, a convenient way of measuring the effect of changes to the tune.

A flat stretch of road and one of the accelerometer based performance tools (I use a 15-year old G-Tech Pro). or even a stopwatch will do the same thing--arguably better because you are operating under real conditions with the car rolling on all 4 wheels.

teej281

^I was always more fond of street tunes myself for the reasons you stated. The real world data is what is important. A car can put down huge numbers from a tune on a dyno but perform sub-par at the track or on the street. The ultimate tune if youre a drag racer is a test and tune at a track and tune it that way. But for most applications, a street tune by a professional is probably the best bet.