Tuesday, July 18, 2006 - 06:05 pm, by: Hesham Hammoudah(Iverson)
i've seen advertised these gtech computers that stick on your windscreen and plug in your ciggy lighter and they tell you your 1/4mile, 0-100, gforce, cornering g's, has shift lights, personal dyno, tells your kw's and etc etc, the list goes on...how good are they and are they worth the money?
Tuesday, July 18, 2006 - 06:16 pm, by: Steven Anderson(Cusscuss)
they are as good as the road your on and how accurately you can get it facing directly backwards.
They only really work if you can repeat it on the same road and you will be able to see improvements.
Bear in mind that if you do a 1/4 mile run you will be running a minimum of 40km/h over the maximum speed limit and 400m + what it takes to slow down is a long way.
I got one because they were $50 and realised after a couple of runs its way too dangerous to use one on the street.
Tuesday, July 18, 2006 - 10:36 pm, by: Daniel Clarke(Dieseltrain)
I used to use a Gtech over the 1/4 mile years ago in my olf faclon. Numerous times. Very accurate regarding times, MPH was always showing faster than trap speed tho. when i say close i mean always with 0.2 of a second. on a low 14 second car also.
Thursday, July 20, 2006 - 03:41 pm, by: Cihan Aday(Cihan)
The link you posted related to the SS version of the latest Gtech. It has 3 G sensors employed at all axis for effective pitch correction. I presume the pitch correction allows you to mount it off center without introducing inaccuracy like it would it previous gtechs. It derives HP and Torque readings based on the RPM signal it picks up from the alternator through the 12v cigarette lighter plug and acceleration. It does the usual quarter mile times, 60ft times, displays everything as a nice graph that you can save and look over and compare to previous results.
People are having trouble picking up the RPM signal with some cars. Gtech released an updated version of the firmware to cover a larger range of vehicles, but some people are still not happy. Not much after purchase support it seems, but those that have it working are happy. On a 2JZ the correct RPM signal source is 18 and it is working fine with repeatable results.. Try it online http://www.gtechpro.com/test.html
You could know everything you need to know in 20mins if you did some reading..
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