I got 245hp in the 3th gear run. I do not know if it is a good/bad result.
The car's weight is the curb weight + tank full + my weight.

What should be considered good/bad with G-tech meter?

 

245hp stock seems about right? I don't know anything about a G-tech meter, but why does the weight have anything to do with power? Seems to me that weight is only a concern to time trials?

 

If your car is stock, that sounds about right....

 

The G-tech meter reads lower numbers than any dyno.

The weight is very important to measure the hp with this unit.

http://www.gtechproforums.com/forums...read.php?t=147
http://www.gtechproforums.com/forums...read.php?t=150

 

Weight:
http://www.gtechproforums.com/forums...read.php?t=121

 

I read all those posts and i still don't understand what weight has to do with power? From what i can tell, this system (Gtech) gives you lower numbers that account for "real world" driving... or whatever. But it still doesn't talk about how throwing the weight of your car into the HP formula will help get a true reading of your HP. Maybe i missed that part or i'm just dumb.... Or both.

"In any case, the power measured by the Gtech is truly the amount of power left to propel your car forward, which is really what matters when tuning a winning vehicle." This is the only thing i found that would take into account for your vehicle weight. But it still doesn't make sence to me? Why would anyone care to dyno their car and be given HP numbers the are scaled down to account for conditions that may or may not affect them in the first place. Don't you want numbers reflecting what your engine alone is capable of? Not, "we dyno tested your car and figured out that because your a McDonalds eating faty and you have a full tank of gas, you only have 240 HP pushing you forward instead of the 250HP you should have"...

Again.. Maybe i'm just dumb.

 

Force = mass * acceleration

Work = Force * distance

Power = work / unit time

A G meter can measure acceleration and time. If you look at the above formulas, we're missing mass and distance. Power is a function of work, and work is a function of force, and force depends on mass. Without mass you can't figure out power.

The other part is distance, but that can be calculated knowing acceleration and time, so mass is really the only missing variable that the G-tech needs to know.

Now a Physics major can correct me.

 

Let's say that you run 13s in the 1/4. You should be making something like 260whp.
Let's say that you add four heavy weight people inside your car and need to run 13s again. The only way is adding power to compensate for the addional weight, right?

If you inform your g-tech the correct weight and run 13s it should measure the hp near 260whp, BUT
if you inform the g-tech meter more weight than you car actually has and still run 13s it will measure more whp = false whp

 

Ahhhh.. Sorry for highjacking your post. I get it now. I didin't put together that the "G" in "G meter" meant G force. I was thinking it was just a cheap dyno type knock off thing. I can see now why weight is clearly an issue. I've never heard of a machine such as this. Thanks.