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Gtech Tesla Performance Meter/pro Electronics on 2040-parts.com

US $149.99
Location:

Austin, Texas, United States

Austin, Texas, United States

Brand new in opened box, works, never used.

Please see all pictures. Unit power up and works as it should. 



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G-Tech Pro Performance Meter 

The G-Tech Pro Performance Meter is basically a precision accelerometer that can calculate 0-60 and 1/4 mile times, lateral and braking Gs, and horsepower. It looks a lot like a radar detector, and mounts in a similar position above the dash on the windshield. (This is not a good thing in a province where radar detectors are illegal.) The unit comes with a mounting bracket that sticks to the windshield via a suction cup. The G-Tech velcro's (or snaps, on some models) onto the mounting bracket. The bracket tilts up and down so that the G-Tech can be made as level as possible. Because the unit measures G forces, if it is not level it will "feel" the gravitational pull of the earth, skewing the results.


The G-Tech Pro unit. Small, but powerful.

We were very surprised at it's quality construction, performance and accuracy. It is a relatively small unit measuring only 3 inches by 2 inches but it "feels" nice. It's molded from a dense plastic and an excellent high quality cord is attached to the unit. The 12vt cigarette lighter cord also has an integrated fuse and the unit itself has a noise capacitor, all nice quality touches. Also included is an adhesive Velcro strip, and a suction cup mount to put the unit on your windshield. 

What can The G-Tech pro tell you?:
0-60 time (+ or - 1 tenth of a second) 
60-0 braking distance (+ or - 2 feet) 
1/4 mile ET (+ or - 1 tenth of a second) 
1/4 mile trap speed (+ or - 1 mile per hour) 
Rear wheel horsepower (+ or - 3 HP) 
Instant peak lateral G's (+ or - 2/100ths of 1 g.) 
Continuous skid pad G's (+ or - 2/100ths of 1 g.) 
Braking G's (+ or - 2/100ths of 1 g.) 
and Acceleration G's (+ or - 2/100ths of 1 g.)

The above are REAL WORLD expectations, not ideal lab conditions. Internally the G-Tech is much more accurate: 1 foot for distance, 1/100th of a second for times, .1 miles per hour for speed and 1/100th of 1 G for G-forces. So this means with several averaged runs, you can get very close to "dead on" with your readings. As close as anything $10,000 worth of test gear would buy you anyway. Professional drivers use this device and many average runs for best results. Many of the performance numbers you read in all the popular auto magazines and on automotive television shows are gathered and measured by accelerometers similar to the G-Tech pro.

Let's explain how this works: 
In simple terms the G-tech pro is an accelerometer, an accurate clock and a DSP chip to record measurements 400 times per second ! (The G-Tech is actually more than that, but this is for our own simple explanation for stang newbies).

Calculating HP, speed, distance, Mass, and time to get performance numbers is actually a very easy equation. Let's look...

Velocity (V) (or speed) is calculated by Acceleration (A) multiplied by Time (T). V=AxT. The G-Tech can calculate acceleration with it's internal accelerometer and time it calculates by it's internal clock which is automatically triggered at the launch of your stang. So it can calculate Velocity (or speed) easily.

Now that you have Velocity (V) calculated you can get Distance (D) easily by just multiplying V x T. D=VxT. So now you have Acceleration, Velocity (or speed), Time, AND distance all figured out! Now how do you get Horsepower ?

For horsepower you need to throw Mass (M) into the equation. Mass is the weight of your stang in pounds. Oh yes.. we forgot to tell you, the G-tech allows you to enter the weight of your stang into it ! Now that you have entered the weight of your stang into the G-tech pro, it has all the info it needs to further calculate rear wheel horsepower. The equation is: Horsepower = Velocity x Acceleration x Mass. HP=VxAxM. Now you got rear wheel horsepower !


Assembly is easy with the Velcro strip and plastic anti vibration legs and suction cup mount.

The G-Tech measures "real" HP that takes into account drivetrain loss, wind drag on your car, any ram air / cold air systems you may have, etc. This is because your stang is actually moving down the road and not standing still on a dyno. Remember that as your speed doubles, wind drag quadruples in resistance. Also because of this your HP may show slightly less than on an actual standing still dyno. This would mean that if you improved the aerodynamics of your stang that it would actually show up as extra HP on the meter even though you did not do anything to your engine. In many forms of road racing HP is talked about and gained in this manner. As "free" HP. In this sense, if it's windy out we'd suggest a run into and out of the wind for a best averaged run. For HP calculations you only need to rev your engine and move until you reach peak HP, you can usually do this in 1st gear.


G-Tech finished and ready to go!

The accelerometer can also measure both positive and negative G's. This is how the unit can factor in braking distance, by applying negative input from it's accelerometer into equations during braking. The DSP chip records info 400 times per second to insure accuracy. To get right / left lateral g's you simply turn the unit sideways in your stang and drive the skidpad in either direction. The unit will over time give you your best constant g figure and stores it for push button recall.

Let's look how easy it is to get your Horsepower at the rear wheels with the G-Tech pro:

1. When you first turn on G-tech you choose which mode to put the switch in. 0-60 / 1/4 mile OR constant G's / Horsepower mode. After putting the switch into HP mode, it asks us again what setting to use. It will flash "Gfrc" (for G-Force) an "Accl" (For acceleration mode) on the display.2. When we see the word "Accl" up on the screen, we push the switch on the front of the unit in. This switch also acts like a button. Here we choose "Accl" mode.3. The unit will then ask us for the weight of our stang in pounds. Here the unit is showing "P 0" Which means 0 pounds.4. For us to get the weight of our stang we look at the grand weight total on the sticker on the passenger side door. This weight shows your stang plus 4 people in it total. YOU SUBTRACT 180 LBS FOR EACH MISSING PERSON not riding in your stang. This will be the general weight of your stock stang. For better results, get your stang weighed.5. This is really neat. To enter the weight you push and hold the button and simply rotate the unit. Tilt it up and the numbers increment up. Tilt it down and the numbers increment down. The more you tilt, the faster the numbers increment. Too cool ! After you let go the button, the G-tech will go into a G reading mode so you can get the unit properly mounted on your dash.6. Next stick the unit on your windshield, make sure you have it facing straight. It may look straight from inside the stang, but be way off from outside. We say pull over and check it from the outside to make sure. Also make sure the unit reads "0" g's. If the unit is tilted a bit, it will show .02 + or -, so get it as level as you can.

7. After you enter in all the values the unit will start showing G's when it's doing nothing. To arm the unit for HP testing just push the button and the G-Tech will show "Go" on the display.

8. Just follow the directions on the screen and hit the gas. It takes a good launch to trip the meter. This is nice because you get no false starts. The meter will begin to show you your HP output at the rear wheels in real time and increment as you step on the gas! After the run, your peak HP will be displayed on the G-Tech. Here it shows 45HP and counting...9. If you leave your G-tech on the dash for a long time. Heat may introduce drift in the Gtech's measurements. Don't worry, no damage will occur, but to check the unit simply hold it vertical. It should read -1 G (the earth's pull). Here after about an hour on our hot dash, the G-tech is still "dead on" reading the 1 g from the earth's gravity perfectly.

It's even easier to get performance times. Just turn the G-Tech on, push the button, and go! If you are going for a 0-60, then drive until you hit 60mph and then slow down, the G-Tech will show you your time. If you are going for a 1/4 mile, then keep on going until you reach a 1/4 mile. For 60-0 braking just get your stang above 60 mph (any speed above) and start braking. The G-tech knows your speed and will only measure your 60-0 stopping distance! You don't need to know how far a 1/4 mile is either, the G-tech will let you know when you've hit it and give you your speed in mph and your trap time! The G-tech automatically stores and shows you your results after each run. Operation is totally automatic. You just drive and it gives you your performance numbers!

The unit performed extremely well for us. With only an accurate weight input of your stang, a fairly flat level surface to drive on, and a proper placement of the G-tech in your stang, you can expect very accurate results especially after several averaged runs in your stang.

Keep in mind that there are MANY factors that influence performance, engine temp, oil viscosity, wind, fuel, humidity, air temperature, driver skill, etc. Don't be surprised if your runs vary by up to 10% each time when doing runs one after the other or on colder days, hot days, etc. Using the G-Tech, it would be best to use the same patch of road as well for your tests or a flat level surface each time.

IMPORTANT NOTE: Don't go out on a busy street and start doing 1/4 mile runs. Find a closed area to do your tests. Use common sense and keep the streets safe.

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