GTech Competition Pro results hot off the presses

[rocketspeed]

Got a GTech Competition Pro for X-mas and I must say- these things are AWESOME! It tells you so much about your car, its just plain incredible. When you aren't running 0-60 or 1/4 mile times, it tells you cornering and accelerating G's with an accurate tach and shiftlights, which are most useful.

Got an idea of what the car weighs with me in it today, so I took it out for its first 0-60 run. Didn't have space for a full 1/4 mile and it would be highly risky to try it anywhere around here from a continuing to have a driver's license standpoint.

Test conditions are about 40*, no wind, flat to very slightly uphill straight strip of road. Car is bone stock. Full tank of 93 octane.

Note that the only numbers that are weight related are horsepower & torque. All of the acceleration times are based on the internal accelerometers, which don't need to know what your car weighs to work.

This is supposed to be a highly accurate piece of equipment, so that 0-60 time should be right on. I let off the gas right after passing 60, so the 1/4 mile time is just where I hit the button to turn it off and is not relevant. Again, the weight input for the car is not relevant to this figure. The 0-60 time looks pretty solid and about what I'd expect to get. Launched it at about 2k with a little wheelspin and feathering the clutch, hooked up pretty well and took off nicely. I get less wheel hop and more spin with the narrower snows I have on now and my smaller steel wheels I'm guessing shave a little unsprung weight vs. the Racing Harts.

I've got the weight of the car with a full tank at 2,800 pounds and I'm 195, which results in the total weight of 2,995 pounds.

I'm curious if this number is tiny bit light, as the horsepower & torque numbers are a little higher than expected. Remember that the GTech will register lower numbers than a chassis dyno because of aerodynamic resistance. These are numbers that I'd expect to see on a chassis dyno, although I guess the aerodynamic drag 0-60 isn't super high. Gotta find a scale.

http://www.mazdamp3.com/members/rocketspeed/gtech060.jpg

http://www.mazdamp3.com/members/rocketspeed/gtechhpcurve.jpg

http://www.mazdamp3.com/members/rocketspeed/gtechhptq.jpg

[mp3moose]

Sweet, where did you mount yours?
Moose

[rocketspeed]

Just stuck to the windshield with the suction mount. That thing is kind of a pain, but when you get it mounted right, its pretty good.

[rocketspeed]

And here's a pic of the rig. Crappy resolution due to camera phone.

http://www.mazdamp3.com/members/rocketspeed/speeder.jpg

The wheels are just hubcaps with steelies, tires are Blizzaks.

[mazdaspeed75]

Thanks alot Tony

[rocketspeed]

Got it for Xmas from my wife, but I know she got it direct from them for $249.

http://www.gtechpro.com/

[rocketspeed]

From their site in regards to accuracy:

How accurate is it?
There are several significant improvements over the original G-TECH/Pro Performance Meter that have been implemented in the new COMPETITION model. First of all, there are 3 accelerometers and they are fully temperature compensated. This in itself is a huge improvement in accuracy. Secondly there is a very sophisticated new calibration algorithm that allows much higher precision. Also the system now has 32 times higher resolution which speaks for itself. New Noise-Correction algorithms have improved overall accuracy as well. With all of these valuable features we are very proud to announce that the accuracy is now within 5/100 second. With the consistency at 5/1000 of a second! Absolute Horsepower and Torque measurements are within 3% and consistency within .5%!

[Kooldino]

Sweet, I've always wanted one of these.

[mazdaspeed75]

Hey man the 60 time i ran at track was2.255 1/8 was9.781 at 71.84 mph Thats pretty close what mods do you have I have injen unflashed car

[StarvingRussian]

sounds like a cool piece of equipment

[Pro5OnSpeed]

thats bitchin i need one of those.

[rocketspeed]

Here's my mod list:





I don't have any!

[mazdaspeed75]

Is it flashed

[rocketspeed]

It does a hundred other cool things. All kinds of graphs showing shiftpoints, how fast you were going at different distances, engine speeds and so on. Its a goldmine of info.

Should be quite accurate to what you see at the track, although i wouldn't call it a substitute since you never really know if the ground is truly flat that you're on and so on. Seems like a great tool if you were modding, though, as you could readily see the changes in performance from your mods.

If you're like me, you don't have a dyno handy.

[rocketspeed]

Originally posted by mazdaspeed75
Is it flashed

Unknown. I bought it after the flash came out, but there is no evidence (the sticker they put in the engine bay) that it was done.

I don't have a hesitation problem, so I never looked into it and I'm not planning on changing boost, so its not really an issue for me unless the hesitation eventually shows up.

I asked when I took delivery of the car and nobody knew.:rolleyes:

[mazdaspeed75]

They should be able to look it up I have the hesitation so i called them to see if it was done they told me all the ones from a specfic date were done I told them to check they said i wasnt flashed .

[SuperSpud]

what about your 1/4?

[rocketspeed]

Doesn't really matter to me. If hesistation problem appears or if I ever considered upping boost, I'd look into it.

If I had to guess, however, I'd say its flashed since I have no hesitation problem.

[mazdaspeed75]

I took acuras and a auto mustang gt waiting on ion fmic should be here mon Hope this gets me in the 14s

[rocketspeed]

Originally posted by SuperSpud
what about your 1/4?

As I said in my post, there was no room to safely run a quarter.

[Wantmoreboost]

I have a G-tech too. I had it in my mustang first and the quarter mile times are within 1 or 2 tenths accurate(dragstrip proven). However the horsepower and torque are off. I never weighed the mustang on a scale but the weight was near accurate. I weighed the mazda with me in it so we'll see when I get on a dyno. I mounted mine against the a-pillar facing me. I will try to post pics later.

[rocketspeed]

It should be quite close if you get the weight right, remember that it will be lower than what you get on a chassis dyno because of aerodynamic drag. That's why I said I thought the numbers I got might be a tad high.

At any rate, the acceleration numbers should be most accurate as they are not vulnerable to user error.

[jersey_emt]

G-techs are great. I've owned two (the original, and the pro model...both are older than the current Comp Pro). Now I have a Beltronics Vector FX2...which has slighly less features than the Comp Pro, but costs a good deal less ($175).

It matched my times at the track by +/- 0.1 second.

[garretts77]

I just got a gtech pro a month ago off of eBay new for $35. That thing is a lot of fun. We took it out in my buddy's E36 M3 and after a few trials ran a 13.8 and a 13.9 (slightly uphill). The Gtech Pro Comp is around $150 on eBay... I imagine it could only be better than the regular Pro, which is quite fun...

[SmoothCriminal]

I just got a gtech off ebay new for $48 (the price straight from gtech now) I got 6.83 on the first/only 0-60 and 15.94 @94mph 1/4mile so I think I was on too much of an incline for it to correctly guess how long a quarter mile was

btw: i just used the velcro and mounted it to the dash, already got an escort passport 8500 on the windshield

[jersey_emt]

Originally posted by SmoothCriminal
I just got a gtech off ebay new for $48 (the price straight from gtech now) I got 6.83 on the first/only 0-60 and 15.94 @94mph 1/4mile so I think I was on too much of an incline for it to correctly guess how long a quarter mile was

btw: i just used the velcro and mounted it to the dash, already got an escort passport 8500 on the windshield

Yeah...an inclined road really throws off the results.

[jonnydoe48]

Originally posted by rocketspeed
As I said in my post, there was no room to safely run a quarter.

i know how you feel =) i have an hks type 1 and havent found a spot where i can safely run a quarter mile and time it.

[jersey_emt]

Originally posted by jonnydoe48
i know how you feel =) i have an hks type 1 and havent found a spot where i can safely run a quarter mile and time it.

How about the track :p

[andersun16]

I just got one after reading this post - I got the GTech Pro for $49.00 on eBay. At that price everybody with a birth certificate should be required to have on. Does anybody have an accurate weight for a stock 2003.5? Somebody above said they had their car weighed but didn't say what it was.

I've got to stop looking at this site - it's costing me a fortune!

[jersey_emt]

My car with myself (150 lbs), about 50 lbs of junk in the trunk, and a little less than 1/4 tank of gas weighed 3005 pounds.

[rocketspeed]

The older, cheaper one has less of the cool functions and is supposedly a little less accurate, but I think its about as good as the Bel and other competing models. The new one is super cool- it really is a goldmine of info.

[jersey_emt]

Originally posted by rocketspeed
The older, cheaper one has less of the cool functions and is supposedly a little less accurate, but I think its about as good as the Bel and other competing models. The new one is super cool- it really is a goldmine of info.

The older one (which I used to have) isn't as accurate as the Beltronics or Escort models...the Bel was within +/- 0.1 second of the track timer on all of my runs.

[rocketspeed]

With the original, the Bel or the Escort, you lose a lot of the cool functions (the tach, shift lights, all the graphs- hp and torque curves viewable on the unit.....on and on) of the Competition Pro. It really is neat.

[jersey_emt]

Yeah...the Comp Pro is an awesome tool, but it's expensive :) The Beltronics model does everything I want: 0-30,40,50,60,70,etc time, 60ft/330ft/1000ft times, 1/8 & 1/4 mile and speeds, peak HP & torque, average HP & TQ, autoleveling, and saves 10 runs in memory.

The Comp Pro has a bunch of other features....like shift light, dyno graph, digital tach....


If you have the money, definitely go for the Comp Pro, but any of the accererometers are cool toys.