I have both the Pro and now the Competition unit. I haven't tried the Competition unit yet, but most people are reporting it to be pretty accurate. I used the Pro unit with an all wheel drive car, so I couldn't actually dyno the car, but the readings seemed reasonable, were repeatable and pretty much tracked my expectations as I added mods. Doing an easy launch and then a hard run to redline in 2nd gear seemed to give me the most repeatable readings.
The horsepower is reported in RWHP.
The horsepower is reported in RWHP.
