G-Tech Pro
I have one, used it only a little. The cheapo version
that was being blown out on eBay a few months back
at $49. Since opportunity for true 1/4-mile-like runs
is kinda limited I've mostly just used it in the G-meter
mode and looked at acceleration G on highway run-ups
in 2nd gear; good enough to see if tweak N made better
than a 1% difference under practical conditions, anyway.
That's its main utility for me - judging whether I made
something better or worse by fiddling, quantitatively.
It's the cheapest performance measurement you're likely
to find, and "accurate enough". If you want HP to be right
then you have to give it a good weight setting, and it
doesn't agree with 1/4 mile trap MPH on account of the
difference in how the track measures vs true end-of-1/4
velocity (G-tech is truer, track is "accepted method" that
everybody else's stats are based on, if you're comparing).
The "Comp" version is fancier & prettier (if you like that
kind of thing) but I'm a fan of black, small, unobtrusive,
good enough and as cheap as possible.
that was being blown out on eBay a few months back
at $49. Since opportunity for true 1/4-mile-like runs
is kinda limited I've mostly just used it in the G-meter
mode and looked at acceleration G on highway run-ups
in 2nd gear; good enough to see if tweak N made better
than a 1% difference under practical conditions, anyway.
That's its main utility for me - judging whether I made
something better or worse by fiddling, quantitatively.
It's the cheapest performance measurement you're likely
to find, and "accurate enough". If you want HP to be right
then you have to give it a good weight setting, and it
doesn't agree with 1/4 mile trap MPH on account of the
difference in how the track measures vs true end-of-1/4
velocity (G-tech is truer, track is "accepted method" that
everybody else's stats are based on, if you're comparing).
The "Comp" version is fancier & prettier (if you like that
kind of thing) but I'm a fan of black, small, unobtrusive,
good enough and as cheap as possible.
Bout what the other poster has already said. I have the older G-Tech Pro and it's accurate enough. MPH in the 1/4 mile is always going to be off, two different ways of measureing the mph. The GTech measures it at exactly the 1/4 mile mark. The timers at the strip actually average the mph other the last few feet.
ET and HP are pretty dern close if you input the right weight and have the unit leveled correctly,,,, and you are on level ground. If you can't find perfectly level ground, make runs in both directions and average. You should really average at least three runs anyway. You can also slightly angle the meter to fine tune your readings if you are at the strip making comparision runs.
ET and HP are pretty dern close if you input the right weight and have the unit leveled correctly,,,, and you are on level ground. If you can't find perfectly level ground, make runs in both directions and average. You should really average at least three runs anyway. You can also slightly angle the meter to fine tune your readings if you are at the strip making comparision runs.
I tested the G-Tech Pro at the dragstrip a while back. It recorded 1/4 mile ET to within .015 of measured (time clocks) and was within 2mph of track clocks. Pretty darned accurate I'd say.......
Richard
Richard
