Were you ever curious what your 0 to 60 or quarter mile time was but didn't have a local dragstrip? Better yet, wouldn't it be great to find out if the performance part you just installed on your Jeep actually increased horsepower. Well, the G-Tech/Pro from Tesla Electronics can help. This handy little device does all that and more.

How it works

At the heart of the G-Tech/Pro is a very precise accelerometer. Now think back to physics class, do you remember all these seemingly useless formulas with mass, acceleration, speed, force, etc. in them? Well finally somebody has put those formulas to good automotive use. The only thing G-Tech/Pro needs to connect to is a power source (cigarette lighter), that is it. Once plugged in and level, it can give you all sorts of useful data including:

Instantaneous horsepower Peak horsepower Quarter mile time Quarter mile speed 0 to 60 time 60 to 0 braking distance Longitudinal G's Lateral G's Instantaneous G's Peak G's

So basically, the G-Tech/Pro accurately estimates just about every performance figure you could want.

Operation

The G-Tech/Pro can measure so many things, a brief look at the instructions was necessary. Once you read the instructions and give each feature a try, it is really easy. The G-Tech/Pro is mounted to the inside of your windshield with an attached suction cup. The suction cup is a handy way to get it up there, but it did slip a few times, leaving the G-Tech/Pro in a free fall. Luckily the G-Tech/ Pro is very light and small so it is tough to damage it much even if it does slip off the windshield. 0 to 60 and quarter mile times are real easy, just turn it on, level it, select acceleration, select the 0 to 60 and quarter mile times mode, come to a complete stop, press the button in, wait until you see GO on the LED display, then you just floor it, the unit will flash your 0 to 60 times when you get to 60 and will show your quarter mile time and speed once you go a quarter mile, the unit will also compute 0 to 60 stopping when slowing down. No timing or coordination is needed, the unit doesn't begin counting until you move, which makes for consistent and accurate times. Below is a table of 0 to 60 times taken before and after some exhaust modifications. To get really accurate readings, you must make a run both ways, this normalizes the times and eliminates inaccuracy which can be caused by roads that aren't perfectly level (most roads aren't perfectly level.) The G-Tech/Pro is affected by gravity so level roads are a must or you take one run in one direction and the other in the exact opposite direction as is the case below. Note how gravity skewed the results in the test below. The first and third runs were taken in one direction and the second and fourth runs were taken in the opposite direction. Notice the difference between the two directions, it is clear the road I was on was not perfectly level. Averaging the two figures gives you a true reading.

I was very happy with the consistency of the readings and it made me feel much better about my new modification. I knew right away the difference it made. All the other modes provided similar consistency since they all are derived from the same reading, acceleration. Horsepower mode was also helpful. To compute horsepower you must enter in the weight of your vehicle, which takes less than a minute to do, come to a complete stop, press the button, and instantaneous horse power is displayed, the unit records the peak horse power of the run. The chart below shows the accuracy of the G-Tech/Pro.

Conclusion

This neat little gadget can be lots of fun and very informative. If you are sure to take readings in both directions, you will get very accurate readings. I found it most useful when making a modification to my Jeep to see if the performance hop-up really delivered what it promised. The suction cup can be a little finicky especially in cold weather, but I can't think of a handier way to attach it to the windshield. The G-Tech/Pro delivers a lot of features and fun for less than $150 and is something you can use in just about any car or truck you hop in to.

http://www.gtechpro.com

TESLA Electronics
1728 Wellesley Avenue West, Los Angeles, CA 90025, U.S.A.
1-800-GTECHPRO