Cheap G-Tec meters

[peppernick]

OK not the latest but for that price, why not ;) ....Use it, get bored with it and re-ebay it. No loss.

Just bought one :D

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=43120&item=7975872278&rd=1&ssPageName=WDVW

[Stock323iSaloon]

Nick, how is this connected to your car?

p.s. the first pic has a digi read out that says 104 quid? :D

[peppernick]

It's either via the 12 volt cigarette lighter plug or self powered.

Damn, all sold!!! There were 12 available when I bought it.

[toffer325ti]

Damn that was a bargain :eek: Well spotted Nick I doubt you will have to Ebay it when your bored with it! Im sure one of us lot will snatch it off you

[peppernick]

Keep his details. Looking at his feedback he's sells nothing but GTEC meters. I'm sure he'll be back very soon.

[Chaos]

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=7977760443

Go go gadget freaks! Just got one myself, top spot Nick. :cool:

[toffer325ti]

Hehe!!! Just got one too [ok

[Stock323iSaloon]

It's either via the 12 volt cigarette lighter plug or self powered.

Damn, all sold!!! There were 12 available when I bought it.

I meant to ask how the unit measures the speed etc. It can't 'sense' the speed without wiring it somewhere can it? I mean, how can it tell how fast you're going...GPS technology for 32quid???

[peppernick]

Ah ha.....more listed. Where the heck does he get all his GTEC meters :confused: ....and at that price.

Mitsu, the unit senses G-Force and translate it into numbers.

[mystic sport]

Had one of these toys for a while now. It showed my 325 0-60 as 7.01 and I only ran one 1/4 mile time and that got in at 15.26 seconds with a speed of 94.5mph. My 330i has recorded a 0-60 of 6.18 but so far I have not done a 1/4 run. Both cars had a full tank of gogo juice and the 330i was spinning in second and it was run on a slight incline so I bet my bile duct I can crack 6 seconds in the old girl :D .

Pic of the time in the 330
http://www.btinternet.com/~topaz_ci/bmwland/0-60/0-60-result.jpg

And a video to prove it (330 again):

Right click and save as for the vids. Vid 1 (the 6.18 run) is approx 3mb and vid 2 (the timer proof) is 750kb. (need quicktime)

http://www.btinternet.com/~topaz_ci/bmwland/0-60/0-60-330i.mov
http://www.btinternet.com/~topaz_ci/bmwland/0-60/0-60-result.mov

[mystic sport]

I meant to ask how the unit measures the speed etc. It can't 'sense' the speed without wiring it somewhere can it? I mean, how can it tell how fast you're going...GPS technology for 32quid???

It uses an accelerometer which is a precision cut (laser) piece of silicon that is in some kind of chemical sandwich. This is the technology that is used in a multitude of performance meters that most of the very well known magazines use.

===============================================
Taken from the GTech website:

How does it work?
The heart of the Gtech Pro is a precision silicon accelerometer. An accelerometer is a sensor that measures acceleration, also known as G-Force. G-Force is what's keeping you in your seat as you are reading these words and if it wasn't for the seat you would be accelerating to the ground at 1G (32 feet per second per second).

Gtech Pro measures your speed and distance traveled by integrating acceleration over time. Basically, if you know how fast you are accelerating for a certain time period you'll know how much your speed has changed after that time period. So, if you start of from zero speed then you'll know what your speed is after every time period. These time periods are very small (2.5 milliseconds) and that's how Gtech Pro maintains its accuracy.

Distance is measured in the same fashion, if you know how fast you are going for a certain time period you will know what is the distance traveled during that time period.

Gtech Pro also measures delivered Horsepower, sometimes called Rear Wheel Horsepower. This horsepower includes the loss of power through the drivetrain which is usually 10-15%. The formula for Horsepower is speed times acceleration times the weight of the vehicle.

Our accelerometer is one of the best in the world. It starts out as a 1/8 inch silicone cube. Then it's laser sliced in to a sandwich with the critical mass in the middle. It sits in the specially designed silicone gel with dampening characteristics tailored for automotive dynamics. On top of all this there is a special accelerometer enclosure with grounded metal layer for EMI shielding. At Tesla Electronics Inc. they believe that the best way to insure accuracy is to get a good, clean signal from the outside world and that's why the accelerometer in the Gtech Pro costs more than all other parts put together.
===============================================

Having researched this particular model as well as others it seems to be fairly accurate to other manufacturers figures as well. Considering BMW are always a little conservative in their data then I think the results I have got are good. Also, quite a few guys on E46fanatics with 325i/ci have run mid to low 15s in a 1/4 mile supported with timing slips.

[Stock323iSaloon]

Thanks for the comprehensive info [read God, technology has come so far!!!

[pete323]

At that price it was rude not too [cool
A guy from our club has one and we can hire it at track days for £5 per hour
Not anymore LOL [hmm

[pete]

Just bought one! what a bargain...good find nick.


Although 1 small problem......I dont have a cigarette lighter [crackmeup

guess it will have to wait till the new car is bought ;)

unless anyone knows if i can run it witout a lighter :confused: ??

[Durgesh]

Yup, you should be able to connect it direct to the battery, just need to run a fuse in-line as well.

Durgesh

[speed]

Just bought one as well. This guy is gonna love Evotechnik (should have done a group buy and got them even cheaper)

[toffer325ti]

Just bought one! what a bargain...good find nick.


Although 1 small problem......I dont have a cigarette lighter [crackmeup

[crackmeup [crackmeup Classic mate! [ok

[peppernick]

Although 1 small problem......I dont have a cigarette lighter
What not even a pocket cigarette lighter? ;) ......just take the SLK350 :D

[lee330sport]

Give us a bell when you get it Pete, id like to know what my car can do, have some fun on Oxford Rd.lol

[Stock323iSaloon]

Speaking to 0-60 times...doesn't Escort Cosworth have a 0-60 stop watch factory fit as standard?

[lee330sport]

Speaking to 0-60 times...doesn't Escort Cosworth have a 0-60 stop watch factory fit as standard?
Dunno, but nearly all vauxhalls do.

[toffer325ti]

Well mines just arrived [ok

Bit pissed though cos the car's in the $tealers :rolleyes:

Looks like i'll have to test it out on the 118d courtesy car :D

[speed]

Mine's just turned up as well. Been out playing with it for a bit, pretty easy to use once you've read the instructions.

Its not stopped raining here but went out and had a few blasts down the road. Managed to get a 0 - 60 ... 6.3 secs and 1/4 mile .... 15.1 secs 96 MPH. Not to bad i suppose considering the roads are really wet.

[Tin]

when did u guys order yours? still waiting for mine, since sunday :(

[speed]

Ordered and paid for mine 7pm Monday, so he sent mine out really quick.

[lee330sport]

Whats involved setting them up? Weight etc?

[speed]

Whats involved setting them up? Weight etc?

i think it only asks for weight if you want to work out the hp. Other than that you just turn it on select whether you want 0-60 etc and go and the thing does the rest on its own.

[mystic sport]

When you are setting it up for speed runs just make sure that the unit is set up level, it is explained in the instructions, to ensure that the times you get are as accurate as possible.

[peppernick]

Hehehe.....parcel should be waiting at home then.... [cool

[Chaos]

Got home and Parcelforce have left me a little note that there's a parcel next door, on my way out again lol.. :cool:

[Tin]

woohoo.. mine was waiting at home too.. nice find nick![jam

[lee330sport]

Get some results up then! Or is it raining there too.:(

[RDG 40]

are these worth getting then? as theres some more on ebay now!

[Tin]

yep been raining all evening.. damn no good for nuffin wotsits!.. try it on my way to work in the morning :D

[Chaos]

Dammit my mpg has gone through the floor, been trying all the way to work and back to see how long I can hold 0.4G on acceleration lol. :D

[Matt H330]

I've ordered one too, rude not to!!!!

How long did it take for people to receive them. I ordered before 12 today, any chance it will arrive at work tomorrow or will I have to wait all weekend???

[Chaos]

Took a couple days for mine Matt, most other people's too I think.

[Matt H330]

Ahhh nuts!! I'll just have to be patient.

[speed]

Anyone gonna post results now you've had all day to play. :rolleyes:

[toffer325ti]

Lent it to my mate seeing as mine is in the $tealers

VW Passat Estate 1.9 Tdi (130ps) loaded with his work gear

0-60 mph = 9.62secs :cool:

He says he is going to have some fun with it tommorrow...LOL

[mystic sport]

Well, I have already put a time up from a run back in january (6.18) but I will be giving it a go with a bit less fuel on board to get that sub six second time I need ;) .

[speed]

I need to get out in the dry and try to beat my 6.3 0-60 and 15.1 1/4 mile. Hopefully should be quicker in a weeks time after its remapped. :)

[toffer325ti]

:D Just been for a quick blast seeing as i have the car back now.

0-60 6.47 secs....only done one run and didnt manage to get the 1/4 mile as i was approaching the ass of a car rather fast :cool: