cool gadgets
04-20-2006, 02:12 PM
#21
RE: cool gadgets
Well I'll say this, they do work, but for the money, they are deffinitly not worth it, dynos are much more accurate, and you can actually talk hands on with somebody to make the proper adjustments to your car to make it faster instead of just guessing about what to do.
04-20-2006, 03:11 PM
#22
6th Gear Member
Join Date: Jul 2005
Posts: 5,172
RE: cool gadgets
ORIGINAL: Trill Gear Head
what about a 1/4 mile time. Lets see if that works.
what about a 1/4 mile time. Lets see if that works.
Maybe it's in ricer mode, and measuring performance from a roll. Check the manual and see if it's set to "ricer performance". LOL.
04-20-2006, 03:25 PM
#23
5th Gear Member
Join Date: Oct 2005
Location: Seattle, WA
Posts: 3,696
RE: cool gadgets
ORIGINAL: rygenstormlocke
Accodring to Gtec, the car runs 14.1@107. LOL. Wooo hooo.
ORIGINAL: Trill Gear Head
what about a 1/4 mile time. Lets see if that works.
what about a 1/4 mile time. Lets see if that works.
04-20-2006, 04:14 PM
#24
2nd Gear Member
Join Date: Apr 2006
Location: Brownstown, MI
Posts: 219
RE: cool gadgets
ORIGINAL: skiba5546
You enter the weight of the car, and it calculates everything by G-forces. I have one of these (diff. brand: vericom). Also, how COULD it pull the info from the cigarette lighter? Does the car think "He installed a CAI, TB, and got a tune... he MUST have 230 HP!"???
You enter the weight of the car, and it calculates everything by G-forces. I have one of these (diff. brand: vericom). Also, how COULD it pull the info from the cigarette lighter? Does the car think "He installed a CAI, TB, and got a tune... he MUST have 230 HP!"???
The most important thing with these is that you must know the exact weight of the vehicle and everything inside it as-tested, in order to calculate horsepower correctly. And the road must be perfectly flat and level for the accelerometer to work with minimal error. I always see people get strange numbers because they read somewhere that their car weighs XXXX lbs so that's all they enter. I've weighed my Mustang before testing and my results have been fairly accurate.
If nothing else they're consistent, and good enough to use to find out if you gained anything from your mods. When I used it at the track, my 1/4 times were within .1 sec and a couple mph, but the speed is calculated differently than the track timers. I'll try to remember to dust mine off and test it again when I get dyno tested this summer.
04-20-2006, 06:39 PM
#25
3rd Gear Member
Join Date: Mar 2006
Location:
Posts: 543
RE: cool gadgets
Heh, no. It measures g-force and uses GPS(I believe) to measure speed, acceleration, hp, etc.
04-20-2006, 08:00 PM
#26
I ♥ Acer
Join Date: Jun 2005
Location:
Posts: 766
RE: cool gadgets
ORIGINAL: Harry_F
how would it pull no engine info and get hp numbers. if two cars accelerate at the same time they have the same hp. no. i beleive it measures hp and TQ from the cigarette lighter at the flywheel not the wheels
Heh, no. It measures g-force and uses GPS(I believe) to measure speed, acceleration, hp, etc.
04-20-2006, 11:40 PM
#27
3rd Gear Member
Thread Starter
Join Date: Feb 2006
Location:
Posts: 515
RE: cool gadgets
ITS A TOY, I do know that the tach display is dead on but it starts at 1k rpm, I would be calling guiness book if I even thought those numbers were close, however, ITS A TOY, at least its my take on it, I am going to play with it like any other TOY for a grown up, but hey, they were great #s for sh*ts and grins. LOL
04-21-2006, 01:08 AM
#28
2nd Gear Member
Join Date: Apr 2006
Location: Brownstown, MI
Posts: 219
RE: cool gadgets
The older GTech/PRO model doesn't read ANYTHING from the +12 outlet. It uses just a built in accelerometer, timer, and a chip to record and calculate data.
The only thing the newer models "read" from the outlet is the noise from the alternator in order to calculate RPM. Basically the RPMs rely on the "alternator ripple" that is superimposed on the 12V DC. The newer models added the rpm feature to enable more calculations for more features, such as torque measurement using RPM and acceleration. They added/upgraded alot of other features too. They still calculate hp pretty much the same as the older ones....see below.
Snipped from HERE:
"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 !"
The only thing the newer models "read" from the outlet is the noise from the alternator in order to calculate RPM. Basically the RPMs rely on the "alternator ripple" that is superimposed on the 12V DC. The newer models added the rpm feature to enable more calculations for more features, such as torque measurement using RPM and acceleration. They added/upgraded alot of other features too. They still calculate hp pretty much the same as the older ones....see below.
Snipped from HERE:
"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 !"
04-21-2006, 01:52 AM
#30
3rd Gear Member
Thread Starter
Join Date: Feb 2006
Location:
Posts: 515
RE: cool gadgets
ORIGINAL: Mike 83 GLX
The older GTech/PRO model doesn't read ANYTHING from the +12 outlet. It uses just a built in accelerometer, timer, and a chip to record and calculate data.
The only thing the newer models "read" from the outlet is the noise from the alternator in order to calculate RPM. Basically the RPMs rely on the "alternator ripple" that is superimposed on the 12V DC. The newer models added the rpm feature to enable more calculations for more features, such as torque measurement using RPM and acceleration. They added/upgraded alot of other features too. They still calculate hp pretty much the same as the older ones....see below.
Snipped from HERE:
"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 !"
I'm glad you found this post, the accuracy however depends on the accuracy of the input data for your specific parameters, I did as the book said, the article and manufacturor guarantee the accuracy to certain percentages, the only variables that I have uncertanty about are pitch and weight of vehicle, I like the little gadget, and actually believe that with some time I could get it to do just as advertised, I still dont believe that I'm pushing 253hp and 264# trq, but I will get to a closer point of actuality with this "cool gadget" in the future. It is still just for fun.
The older GTech/PRO model doesn't read ANYTHING from the +12 outlet. It uses just a built in accelerometer, timer, and a chip to record and calculate data.
The only thing the newer models "read" from the outlet is the noise from the alternator in order to calculate RPM. Basically the RPMs rely on the "alternator ripple" that is superimposed on the 12V DC. The newer models added the rpm feature to enable more calculations for more features, such as torque measurement using RPM and acceleration. They added/upgraded alot of other features too. They still calculate hp pretty much the same as the older ones....see below.
Snipped from HERE:
"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 !"
I'm glad you found this post, the accuracy however depends on the accuracy of the input data for your specific parameters, I did as the book said, the article and manufacturor guarantee the accuracy to certain percentages, the only variables that I have uncertanty about are pitch and weight of vehicle, I like the little gadget, and actually believe that with some time I could get it to do just as advertised, I still dont believe that I'm pushing 253hp and 264# trq, but I will get to a closer point of actuality with this "cool gadget" in the future. It is still just for fun.