thoughts on g-tech meters

Has anyone used the G-tech performance meters. I heard from a buddy who has a '05 STI that G-tech ss meter was close to his specs, 2 hp off. He has not tried it at the track yet.

If anyone has tried one let me know. I am thinking about borrowing his to try it out and see if it is worth it.

The newest top of the line one, ive heard is pretty accurate if you set it up properly. I would like to get one, but i cant see myself spending $300 for one.

I swore by the lowest end one I bought off eBay a year or two back for $40.
Not for the HP, because I could never get an even close to accurate reading for that, but for ET and MPH in the 1/4 mile.

Then I finally hit the track with it.
It was at minimum 1 second off (over) on the ET, and about 7% off (over) on the MPH. It was consistant, as were my 4 runs, but the innaccuracy lead me to eBay.

I got $76 for it off eBay so there were no hard feelings on selling it.

I would assume their more expensive models are probably much more accurate.

Car & Driver or Road & Track did a test on 10 different ones last year. There was one called a Tazzo that looked just like an original G-tech that was $70 and performed pretty accurately. It was a very complicated segment so I'll try to find it online a post a link to it. It even talked about some devices being less accurate in a truck or suv due to the front of the vehicle lifting up higher than a sports cars which gave a false reading of quicker acceleration. Again I'll try to find it on the net and post a link.

OK. I found the review. Lots of reading so really read this if you are going to get one:
http://www.caranddriver.com/features/9380/do-inexpensive-performance-meters-work.html

If you want to use it for comparison purposes after you do mods to your car, it should work fine. You merely establish a baseline and go from there. There have been documented reasons why it is not accurate as compared to actual 1/4 mile track times, having to do with the way each is measured.