G-tech On-board Dyno

[cruzin33]

Im thinking of buying the G-TECH on-board dyno, it reads your 1/4 mile time, hp,0-100 time,storage of drag times and a lot more. Its plugs into the cigarett lighter socket and thats it, i have no idea how it works and can tell so much info from this? it retails from $535au. Does any one have one or know how they work? and if so do they give a correct reading?

Cheers

Dave

[InterCooL]

there is debate. i've seen very accurate results yet others hate them

you can get a simple version that tells u 0-100, 100-0, 1/4 mile and hp output for around $30-$50 on ebay, i got one myself.

cool little tool

[paulr33]

it uses g sensors like the rsm to measure force to work out a cars power and speed, much like the apexi rsm does

[bigcarl]

ive got one of the earlier gtech meters and ive never used the rear wheelpower measurement but ihave used the 0 to 100 km/h and quartermile function. now i cant verify how accurate 0 to 100km is but the terminal speed for quartermile was pretty much spot on for what it was on my time slip at the legal off street drags. and i found that using the o - 100km/h function actually helps you to work out how many revs to drop your clutch at and how best to feed the power through the drive line to get the best results ie: i was getting hih 5 sec o-100 km/h with wheelspin when i dropped the cluth at 6000rpm with 280rwkws and then found that launching the car at 4000rpm gave me low 5s seconds 0 to 100 . then i found that reving the car to redline in 1st gear to second gear was giving too much wheel spin , so id short shift first gear to second and id come up with high 4s second 0 to 100 km/h on shitty street tyres . then it made better at getting a better 60 footer at the drags e.t.c. so i found the g-tech to be a good tool for this.

[scathing]

there is debate. i've seen very accurate results yet others hate them

As per the doco, the number it gives you (especially in the higher gears) will never read the same as a dyno. There's no wind resistance to influence the numbers on a dyno.

In the lower gears, where you're not going as fast, its meant to be quite accurate if you get the weight and calibration right.

[Swiper the Fox]

I have the latest G-Tech PRO RR set up correctly its only thousandths of a second off the time boards at the track and almost spot on in its MPH times sometimes its perfect. We always weigh the car at scruiteneering and put the correct weight in (remember to weigh yourself too) this is critical to have the unit work correctly.