Mr_Rx7_Au

Ok....probably wrong forum section so don't go nuts on me.

Anyway,

My GF's bro has got a Gtech unit off ebay, and gave it to me last night to use, only problem is the dude has no instructions with it, he told me a few things but fucked if I could remember them, so does anyone know how to use a Gtech properly? I guess the main thing I'm interested in is the 0-60 time and the HP.

I know somewhere you gotta put in the weight of ya car in lbs and then select something else but it's kinda hard with no instructions. Anyone?

purple82

They've got a copy of their instructions on their web site.

Mr_Rx7_Au

The website is www.gtechpro.com for anyone who is interested. Did a run last night.... I got 138HP. Not too bad, I guess.

Elysian

heh i had my friend set up a gtech in my mostly stock TII, he had set it up in his 280z before, so he knew how to do it... damn thing told me i'd run an 11 sec 1/4 mile and had like 380 hp... i was like man this things stoned.

purple82

He had it set up wrong. It's very accurate if you tell it the correct information. You have to be pretty exact with the weight of the car if you want it to tell you horsepower.

Pele

iTrader: (28)

You also have to find a LEVEL road... No hills... The thing works on gravity... I can get a quarter mile reading out of it with the car parked and the engine off just by tilting it front and back.

Rx7carl

You can and should correct for any slope in the road by making runs in both directions and averaging the results. There are no perfectly flat roads.

purple82

Yup, it uses a few accelerometers so it's orientation to the ground is important.

RotaryRyan

how do these things work exactly?

im kinda interested. do they work on all cars? like if i got one.
I this one alright?

http://cgi.ebay.com/ebaymotors/ws/eB...category=46100

EDIT:: I read about it, i know the basics now. i think im gonna get one

RotaryRyan

dang these things look cool. I want one.

http://cgi.ebay.com/ebaymotors/ws/eB...category=33597

purple82

Yup, they work on all cars. Actually, they'd work on anything. You want to know the 0-60 of you on your bicycle? Just figure out how to mount it.

nimrodTT

...and power it

The competition unit has way more features and costs way more too. I bought one when they first realeased the competition but never could get good readings in my 7 due to what the manufacturer says is probably excessive vibrations. It's getting mounted on the kart now so I can keep track of lateral g's and brag about my 3 second 0-60 times.

Rx7carl

Yea for what they want for the comp unit, a few more $ and you can have real data acquisition. Thats my next setp in technology when I get back to racing.

clean85owner

I have one of the original G-Techs, and I love it. It's really helpful in shutting up people who think their car goes "0-60 in 5 seconds and runs 12's in the quarter" when all they drive is a four cylinder Eclipse with a muffler and intake. Heh.

BTW, you don't need to put in the weight for 0-60 and 1/4 mile times, you just need it to determine horsepower and lateral G forces.

Pele

iTrader: (28)

Yep.. Thats where I got mine... For $40, cant pass it up.

RotaryRyan

Just bought one

AdrenalifeRX7

I have the GTECH Pro Comp (The new one) and I was trying to sell it. I've only used it once or twice. It's an awesome tool but I need the cash for other things.

RotaryRyan

how much?

1badFB

iTrader: (1)

why would u need the weight to determine the G-force on a car, am i wrong or would the weight have no affect on it at all?

purple82

The weight is used to measure horsepower. The g-tech calculates the power using distance, time and weight. You don't need the right weight to use the g-force, just to calcualte the horsepower.

clean85owner

You are correct, sorry for the misstatement on my part. I haven't used it in a while, and all I can remember is that to the left setting is "HP/G force" and on the right side is "0-60,60-0, and 1/4" I just assumed that whenever you pushed the button to the left, it automatically asked for weight, but it asks after you select the HP setting.

Anyways, thanks for clearing it up.

nimrodTT

Wait a week and I'll sell mine for $200. Comes with everything included in the box plus an extra mounting clip (so you can permanently mount it to, say, your dash instead of using the suction cup attachment). It's practically new - still has the plastic sticker thing covering the display.

RotaryRyan

ehh. i already bought the pro model

nimrodTT

oh well, maybe someone else is interested