[Rev]

I've used both the original Gtech and the newer Gtech Pro. I like them. The older one was very optimistic as to times and trap speed when I ran at the same time on the drag strip. The newer Gtech Pro is a little pessimistic when compared to the track times and speed.

Both were exstremely repeatable though. Witin hundreths of a second of one run compared to another with the same conditions. I use my Gtech Pro all the time to tune, especially after changing to different engine parts. When I think I've actually made an improvement, then I go to the track to verify it (it's fun going to the track anyway). After showing improvements at the track, I do eventually dyno the car to see what the RWHP and torque curves look like. It's good to see what the air/fuel ratio looks like too, if your local dyno has that option.

Remember though that the hp/torque figures from the Gtech will be artificially low. This is because air drag and front wheel friction and every thing else that causes a drag on the engine is reflected in the power that the Gtech measures.

Rev