i still haven't gone to the track yet but a friend had that gtech thing, well anyways we went to try it out,
my ride is a 95 GSR with 54,xxx miles and all i have is an RS*R exhaust and a filter on a stick and i consider myself better then the average driver , with a full interior and a passenger of about 150 lbs i pulled a [B] 15.15 sec 1/4 mile [B/] and a 0-60 in 6.58 sec. this sounds too good to be true, am i being fooled by Gtech? i checked their site and they say that its very accurate but does anyone know how exactly accurate it is? i mean does anyone have track numbers compared with Gtech numbers?
if this is true then i cant wait to put on my cold air extension back onto the intake and ditch the passenger, like my sig says, im hoping for 14's but will Gtech let me know accurately if i reached my goal?
THANKS IN ADVANCE


[Modified by bocian, 2:16 AM 7/13/2001]


[Modified by bocian, 2:17 AM 7/13/2001]

 

I've heard that they're VERY accurate, but only when you're comparing different mods (for example, how fast the car was BEFORE i/h/e, and how fast it is AFTER). The times you run on the track and just with the g-tech will be different (not sure by how much, though). Something to do with the timer on the g-tech doesn't pick up right away...??

Isn't there a deal going on with BFG? If you buy four tires, they'll give you a free GTech! Is that true? (saw it in a magazine ad)

 

dude, it's crap.. i bought the pos.. tryed it out for awhile.. then sold it..

I was getting 6.8 and 6.9 (0-60) in my stock RS. *** that.

 

I've had mine for a few years, and I can say that through my experience with it is as accurate as it is advertised. This is compared to G-Tech readings and my readings at the drag strip, HP and time. But it is only as accurate when you put in the correct information. Accurate weight readings are very important to this device.

 

Here's my experience with the G-Tech.

Is it accurate? yes and no... I managed to get consistent readings IF I set the thing up right. By consistent I mean I got repeatable measurements, but the actual times were different than the times I got at the drag strip. So the numbers are only useful for tuning and comparing gains/loss when swapping parts.

The biggest problem I had with it is that the rubber suction cups and swivel on the mounting bracket didn't always hold. Under hard acceleration the unit would fall off the windsheild or it would not stay level because the swivel on the bracket would move. This movement would throw off the readings.

 

Like they said... you HAVE to set the settings right. If you do, we've found it to be perfectly acurate. Of course it's going to be different from the street to the drag strip. I never hook up at a drag strip like I do on the street! We've even used it AT the drag strip... exact same times as the clocks within a few 100's. So let people say what they will... but if it's not setup as close as possible... it IS going to be wrong. So just set it up right... and give it a try.

 

It needs to be zeroed properly. and you need a perfectly flat test area to do your runs. My mom's S500 busted a high 5-second 0-60 run on a slight grade. Flat ground, around 6.4-6.5 average.

 

With my experience, you definately have to set up the device properly. The device will give you different times on the track then what it states on the meter, but is accurate in a different way. For example, you have a Civic SI and you are consistently running 15.5's in the 1/4. Say you do a few basic bolt-on parts, or any mod, and now you are running consistent low 15's or high 14's. Then you know that your car is faster by .5 seconds or so. But obviously you want to measure accurate 0-60 and 1/4 drag times, go to the strip. And for accurate hp, torque, etc., go make an appointment w/ the DYNOgod!!

 

Guys, here are my thoughts:

First, from Science class, there is a distinction between PRECISION and ACCURACY.

Precision reflects the repeatability of the device. For example, if you make several runs and avg 15.5, then do some mods, then make several runs, you may avg 15.0. You can conclude that your car is faster. If after mods your times are 16.0, you can conclude that your car is prob slower.

Accuracy would reflect how close you are to the "true" value.

For 0-60, it would be difficult to get a "true" value. GUYS, time to speed is generally NOT a good benchmark or indicator. Yes, I know all the mainstream mags report on it, I used to memorize them and walk around quoting them to figure out which car is "faster." Time to speed is difficult to measure and difficult to compare.

Time to distance will also vary, but it can be more consistent.

Regarding the GTECH, if you use it carefully, you WILL be within a few tenths of you time at the track.

You need to initialize everything carefully, use level ground, run in both directions, throw out high and low values, and use the avg.

Thus, it can definitely be both accurate and precise, but the accuracy will really be upto you.

A few other things, I've never bothered with any handling measurements. Come on, turn the thing sideways? I have never really used the HP and TQ figures either. Basically, I look at the 0-60 as a rough approximation and take the ET from the 1/4 mile. You may have noticed that your trap speeds are way too high? Per the Tesla website this is because the GTECH reads instantaneous speed while the track avgs over the last 60'. Regardless, either IGNORE the trap speed, or subtract 5 mph from it and you should be pretty good.

Thoughts?

FB

 

Hey Berkel,