SJW
Banned
Registered: 8th Jul 05
Location: Malvern
User status: Offline
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This is a Group buy offer for the GTECH pro performance meter, RRP £158.00.
Please note this is an older model of the newer expensive GTECH PRO RR. But the technology hasnt changed, just the features and "flashiness" of the device.
Our offer
10+ orders £27.50
20+ orders £26.50
All prices include VAT and delivery to your door
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)
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 £6,000 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 a simple explanation).
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 car. 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 car in pounds. Oh yes.. we forgot to tell you, the G-tech allows you to enter the weight of your car into it ! Now that you have entered the weight of your car into the G-tech pro, it has all the info it needs to further calculate horsepower. The equation is: Horsepower = Velocity x Acceleration x Mass. HP=VxAxM. Now you have 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 car 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 car 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 car 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.
Now even if you are very skeptical like me and only take the results at face value, say your cars run 7.4 0-60 you can be safe in the knowledge that your car will be between 7.2 and 7.6 MAXIMUM allowance for error.
You can use this device not just to measure your cars performance, but to take a note of the results before you apply a mod, then note to see if the modification has made any difference, making this a very useful tuning tool.
Please note there are some fake copies of this device flying around the internet, this is 100% genuine, and brand new unboxed
IF YOU ARE INTERESTED PLEASE ADD YOUR NAME, THE MORE WE GET THE CHEAPER IT IS
[Edited on 05-09-2005 by SJW]
[Edited on 05-09-2005 by SJW]
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