G-Tech? Worth it?
Thread Starter
Racer
Joined: May 2005
Posts: 433
Likes: 0
From: Vancouver Washington
G-Tech? Worth it?
Who is using a Gtech?
www.gtechpro.com
I have been wondering if these things are worth playing with?
How accurate are they really?
I did borrow one from a friend and have been playing with it, but still not sure.
Any opinions on this product?
www.gtechpro.com
I have been wondering if these things are worth playing with?
How accurate are they really?
I did borrow one from a friend and have been playing with it, but still not sure.
Any opinions on this product?
Last edited by StingerZ16; Aug 13, 2005 at 05:42 PM.
Pro
Joined: Apr 2003
Posts: 550
Likes: 0
From: Northeast IN
They are consistent but not accurate. What I mean by this is that you have to take them to the track to see how far off they are from your slip, but after you have this delta, it is a constant that stays pretty consistent, thus giving you back the accuracy you need. I liked the old model, and I expect I would really like the pro model. You can get the older model for $25, maybe that is a good compromise?
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Originally Posted by TeamSpeed
They are consistent but not accurate. What I mean by this is that you have to take them to the track to see how far off they are from your slip, but after you have this delta, it is a constant that stays pretty consistent, thus giving you back the accuracy you need. I liked the old model, and I expect I would really like the pro model. You can get the older model for $25, maybe that is a good compromise?
I know of no-one that can match their G-Tech times by actually running the car at a real track.
But like someone said earlier, they are helpful as a device to do A/B comparisons.
Pro
Joined: Dec 2003
Posts: 502
Likes: 1
From: Fountain hills AZ
Originally Posted by TeamSpeed
They are consistent but not accurate. What I mean by this is that you have to take them to the track to see how far off they are from your slip, but after you have this delta, it is a constant that stays pretty consistent, thus giving you back the accuracy you need. I liked the old model, and I expect I would really like the pro model. You can get the older model for $25, maybe that is a good compromise?
I have an old one that I picked up cheap. Accuracy is not the issue with them and accuracy depends on better instruments located outside the car. However, they are precise (repeatable) and very useful for determining performance increments when you make tuning or hardware changes. I have LS1Edit, Autotap and when I tune, I find the gmeter useful. I ususally used just the 0-60 timing function, but sometimes the HP function. Instant feedback and is nice to have because SOP is subjective and sometimes wrong. As far as accuracy goes, on the 0-60 timer, it is pretty close to a stop watch, but - again - those are measurements made from inside the car and external measuring tools are really need for accuracy.
So, buy a cheap one, ignore the hype about the computer files it can generate. GIGO rules. Use one for its precision and comparative value when making changes.
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Team Owner
Joined: Jul 2003
Posts: 20,474
Likes: 2
From: Detroit
I have a G-Tech. They can be accurate, although the MPH will be a little high.
I think they are a waste. Just go to the drag strip and focus on driving safely instead of risking a ticket trying to get a good 1/4 mile pass on the street.
Mark
I think they are a waste. Just go to the drag strip and focus on driving safely instead of risking a ticket trying to get a good 1/4 mile pass on the street.
Mark
Melting Slicks
Joined: May 2005
Posts: 3,394
Likes: 12
From: Leon Iowa
St. Jude Donor '06-'07-'08-'09
I got my G-Tech pro off ebay for 25 bucks. I don't know how accurate it is but it' alot of fun. I even tried it on my Kawasaki Prarie 4x4. To me it's worth $25 just to play with.
Safety Car
Joined: Oct 2004
Posts: 4,816
Likes: 132
From: Plano TX
I know for a fact that the Plano Police cars run a 15.6 @ 88 mph. When they catch me speeding I know I am running a low 13 second time and 1/10 of a second is about a car length. So after 25 car lenghths I know what Im running, works great
Safety Car
Joined: Jun 2004
Posts: 4,353
Likes: 22
From: Bella Vista Ca
Originally Posted by StingerZ16
Thanks for the feedback.
I was wondering if the horsepower rating was accurate.
My guess is it probally is not.
I was wondering if the horsepower rating was accurate.
My guess is it probally is not.
Pro
Joined: Jun 2005
Posts: 529
Likes: 0
From: North Carolina
Originally Posted by StingerZ16
Thanks for the feedback.
I was wondering if the horsepower rating was accurate.
My guess is it probally is not.
I was wondering if the horsepower rating was accurate.
My guess is it probally is not.
It will be a measure of rear wheel HP minus HP lost to aerodynamic drag, which equals the HP available to accelerate the car. This number will be less than dyno HP, because a dyno reads only RWHP and does not factor in the aerodynamics of the car. Actually it is really less than that because when you launch you dissipate some HP into the clutch or wheelspin, and when you shift gears you're not making power. All that will average into the HP number the GTech displays.
I have one of the originals (you can pick them up new on ebay for ~$30) and it is a fun toy that gives some interesting info, but that is about all.
Racer
Joined: Dec 2004
Posts: 311
Likes: 2
From: Oppdal Norway
I used to have an old one but recently bought a new one.
Mine is VERY accurate compared to the timeslip (within 1/10sek).
The MPH is a bit higher than on the timeslip but that is because the G-Tech measures the speed excactly when you passes the line vs speed on timeslip is an average over the last 20feet (i think it is 20feet), so that means that the G-Tech is more accurate than timeslip when it comes to mph!
On the difference in et you will have differences because the g-tech starts timing when car is moving vs the dragstrip starts measure when you passes the startingline, meaning it matters how far you go in to stage.
I haven't tried the hp-measure since it is not quite comparable to much else....
In my opinion it is worth every penny, especially for the hometuner and people doing changes on their car
Roger
Mine is VERY accurate compared to the timeslip (within 1/10sek).
The MPH is a bit higher than on the timeslip but that is because the G-Tech measures the speed excactly when you passes the line vs speed on timeslip is an average over the last 20feet (i think it is 20feet), so that means that the G-Tech is more accurate than timeslip when it comes to mph!
On the difference in et you will have differences because the g-tech starts timing when car is moving vs the dragstrip starts measure when you passes the startingline, meaning it matters how far you go in to stage.
I haven't tried the hp-measure since it is not quite comparable to much else....
In my opinion it is worth every penny, especially for the hometuner and people doing changes on their car
Roger
Melting Slicks
Joined: Sep 2003
Posts: 2,911
Likes: 1
From: Augusta GA
St. Jude Donor '05-'06
I bought an R model but have not messed with it yet. I want to see RPM, accel ect all the info I can from the track and see what works best with ET, and shift points, NOT determine ET by the meter but by the time slip. I wanted shift lights too and I read they where acurate vs RPM. I do not want a shift light (yet) and thought it would be fun to download track runs and see what works and get more consistant. I am also looking at an auto tap too... 
Damn I want to get back and DRIVE!!! 
Dave
Damn I want to get back and DRIVE!!! Dave
Drifting
Joined: Oct 2004
Posts: 1,621
Likes: 6
ran my gtech pro one run on the track and it was .5 sec fast in 1/4
when doing hp I beleive you are supposted to do a light shift into 2nd ant a low rpm then givver hell.
I believe it is consistantly off about the same so you can use it for base lining mods etc.
when doing hp I beleive you are supposted to do a light shift into 2nd ant a low rpm then givver hell.
I believe it is consistantly off about the same so you can use it for base lining mods etc.
Safety Car
Joined: Jun 2004
Posts: 4,353
Likes: 22
From: Bella Vista Ca
The Gtech RR model, it has a computer program that goes along with it. It's neat to look at some of the different thing it shows. The HP and TQ it gives is low, as stated above. On the dyno I had 334HP and 367TQ as you can see the Gtech is lower.
Last edited by Mike04; Aug 22, 2005 at 10:07 AM.
Race Director
Joined: Dec 2003
Posts: 12,599
Likes: 1
From: Texas
If you can borrow one from a friend, just use his. I bought one and it's definately fun, mine is a "G-timer" from escort. Some variables have to be played with to get accurate times, parameters like how stiff the suspension is and things like that. Out of the box I could do a 0-60 run and it would say that I only hit 54 MPH. After "tuning" it I think I have it within 1 MPH. My HP is way off, more factors to put in as far as car weight, etc., I think the most I got so far was 264. My brothers S10, with no change in vehicle weight, registered an awesome -1 HP!! LOL
Pro
Joined: Oct 2004
Posts: 566
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From: Miami FL
CI 7 & 9 Veteran
Still available?
Originally Posted by TESTOSTERONE C5-R
I got the GT-2. i paid $250 and never used it. If you or anybody wants it I'll sell it for $100 bucks shipped. 
