You need to use it as its designed and try not to compare track times to G-tech times. Best bet is to run it 5 times for whatever it is you are checking and then compare that to 5 runs after a mod. This way you can see what you are doing. Does not matter if the g-tech is totally different from the track, just use it to compare your gtech times to yourself and it is a good tool.
A forum community dedicated to Mustang Bullitt owners and enthusiasts. Come join the discussion about performance, production numbers, restoration, modifications, classifieds, troubleshooting, maintenance, and more!