I tested mine out at the track a few times and it tends to be off of my true 1/4 mile times by about .2 secs on the ET and about 4-5mph over on the mph. I usually trap about 112mph on the G-Tech when i had the 3in y-pipe and cutout. So today I go out to the same spot i usually run my G-Tech (good road, nobody around, flat and straight). I wanted to see if i gained anything from goin to true duals. So I level the G-Tech out to read .00 before i start and ran about 4-5 times. My highest trap of tonight was 114mph and the lowest was 113mph. The last time I ran my times with the cutout and 3in y-pipe was about 3 weeks at 48 degrees out. Tonights temp was 45 degrees. I thought i would just throw this out there. I'll do some better testing when the track opens here next week. I plan on running some times with the duals then some with open headers. Just curious what you guys run on your G-Techs and mayeb some actual track times to compare.

 

Robbie, I heard the exact same thing, its pretty dead on wiht et, just off on the trap.