I'm looking at 2 performance meters.

Race Tech AP22 and the GTech-Pro.

User feedback would be appreciated.

Mark

I have never put much faith in these things, I always use the old tried and true asphalt dyno.

I love my GTech Pro. I have about 65 runs logged.

Seems to give consistant numbers given similar conditions. While I know that it has a degree of error since I did not set it up specially for my Jeep, it does indicate any performance gain/loss.

On 1/4 mile runs at the local drag strip, it was consistantly about .3 secs off of the trap timing. It read 13.2 secs while the traps gave times of 13.5 secs. I should have better logged the runs and performed Gauge R&R analysis to how accurate the measurements were, but I was at the track to have fun.

I have watched the 0-60 MPH timings drop from 4.8 secs with 3K miles on the truck to 4.5 with 6K miles. During cold weather (65 is cold here) I have about 6 runs at 4.17 secs.

Someday at the track I will try to calibrate to get aligned with the traps, but for now I will just use it to see the delta with a fixed error.

its all in how you calibrate the gtech. i am within .1 because i have the weight perfect and the other calibrations. I think its a must have

During cold weather (65 is cold here)

I would kill for it to be 65 here. Here is a pic from today, another 5 inches in addition to about 4 feet of snow in 2 and a half weeks. I have not driven my Jeep in 3 weeks, had to buy a Toyota for a beater.:mad:

I would kill for it to be 65 here. Here is a pic from today, another 5 inches in addition to about 4 feet of snow in 2 and a half weeks. I have not driven my Jeep in 3 weeks, had to buy a Toyota for a beater.:mad:

Are you in CO? I am in Fort Collins and have been getting the same snow as Denver and I drive my Jeep everyday! Haven't had a problem yet... except that I can't keep it clean longer than 5 minutes. :mad:

Yes, I'm in Colorado Springs, I'm beginning to hate winter. I tried the Jeep in the snow once and don't want to risk hitting a curb so I bought the T100. My wife gives me so much crap about owning a Jeep that stay's in the Garage when it snows.

bro, just take it out...it's not that bad ;)

I'm not worried about the curbs... its the uneven melting of the ice where you get a 6 inch hole through the ice and a few huge pot holes. I am already hating the snow. I wouldn't if they knew how to plow the streets and neighbor hoods correctly and promtly. Oh well... i've been thinking about getting a truck too so I don't have to worry all the time.

This looks promising:

http://www.msdignition.com/2007/images/DashHawk.jpg

http://www.msdignition.com/2007/images/DashhawkData.jpg

Universal OBDII multi-gauge displays over 100 parameters
Connects to your vehicle’s diagnostic port
Display 0 – 60 mph and ¼-mile times with up to five other parameters
Records maximum values for speed, rpm and water temperature
Accepts one additional sensor, such as a wideband O2 sensor
Backlit screen can be set to 16 million colors to match any interior
Set visual and audible alerts for any value
Built-in shift light capability
Check and clear trouble codes
Any parameter can be displayed on any screen, in any order, in any fashion!
Can download info to your PC for graph and other displays

I have a g-tech ss. It works well for 0-60 and 1/4 times. I haven't been able to calibrate the RPMs to my car though, and because of that, I can't do HP and torque measurements. I have heard others have had problems calibrating the RPMs also with our GC SRT8 - this feature seems to works fine with other cars - not sure why this feature doesn't work with our trucks. So, if you are thinking about a g-tech, I would take this into consideration.