Strife350z

iTrader: (4)

Newbie here: but has anyone had any positive/negative experiences with g-tech devices?

D'oh

I haven't used one, but it looks pretty cool. Another cool looking one is the Escort GT-1 or GT-2 timer.

I actually just e-mailed G-tech about the G-Tech Pro Competition because their web site said they are working on an AutoX and Road Race module for their firmware. The support guy said that they have no comprehensive feature list or completion date at this time though. I also asked how much data you would be able to log when they get those features added, and he said that you could log at least an hour, and perhaps more depending on the sampling and logging rate (which would be user adjustable).

I then sent another message asking if those features would be a firmware update (if I were to buy a G-Tech now) or if they would cost extra. I haven't heard back on that, but I'm guessing it would be a simple download of new firmware.

The Escort GT-2 is very similar to the G-Tech Pro Competition, and already has the ability to log lateral G measurements. The only problem with the GT-2 is that you can only log ten 1/4 mile runs or 5 minutes of lateral G data. That 5 minutes is great for an Autox, but not much else. Also, the G-tech uses a 3-axis accelerometer, which means you can orient the display any way you want. The GT-2 has a two-axis accelerometer, which means that it needs to face in a certain direction for good results (the face of the display much be perpendicular to the direction of travel - no yawing the display towards the driver - it can pitch forward and back as well as roll side to side though).

Depending on what I hear from G-tech about the cost of the AutoX/Roadrace module, I may end up getting one of those very soon.

Overall, both units look very cool!

-D'oh!

GurgenPB

iTrader: (2)

Got the G-tech Love it. A great device for people like us. Very accurate.

A stock G35 is rated at 6.2 sec. That's exactly what I get witht eh G-tech. Also, it is better than the others by far. I did a lot of research before I bought. It has 3 accelerometers (although the vertial one is not being taken advantage of until the new firmware). It will be used for correcting the rise factor when you begin a hard acceleration from rest (I.E. the front of the car coming up a little).

It is 100% frmware upgradable. To me, no competition, it is head and shoulders above the bel and the others.

Gurgen

My car does 6.0 to 6.1 sec 0-60, but a whopping 14.0sec 1/4 mile (pretty good for my 5AT). This leads me to believe that I am losing some low end torque. Will be swapping out my injen as it has got to be the cause. Just an example of G-tech i action. You can simply measure what given mod did to your car FAIRLY and REASONABLY (not absolutely) accurately by making a Gtech run. 80 bucks and 2-3 hours saved by not having to take it to a dyno. Instan results.

Can't recomend it enough

Gurgen

Strife350z

iTrader: (4)

Great input! I think I'm leaning towards getting one...

Grugen/doh: in order to get accurate 0-60 and 1/4 mile numbers (and hp numbers at that), did you need to weight your car (with driver)?

Dr Bonz

iTrader: (1)

Strife: You only need to weigh the car for HP measurements. Not needed for 1/4 mile or 0-60 times.

Here is mine:

Dr Bonz

iTrader: (1)

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Dr Bonz

iTrader: (1)

As you can see, it is pretty small. You stick it to your windshield with a suction cup and level it (it is very easy since it displays numbers either + or - and you want it at 0). When it is set you hit a button and it says "GO". You then punch it and it does the rest.

I had an hour to kill in the middle of my day so instead of getting lunch I decided to try it out.

I found a stretch of highway that I cruised first to make sure it was cop-free. In PA only State Police can use radar and they have to be stationary (i.e. they can't shoot you with it if they are moving) so I was pretty sure it was safe.

I stopped at the top of an entrance ramp and did three runs for 1/4 mile and 0-60.

My best 0-60 time was 5.05 sec. and my best 1/4 was 13.55 @ 112.7 MPH.

I had some really bad wheel spin on the other two runs and only a moderate amount on the best run.

THE PROBLEM: My boost gauge was only reading a max. of 3.5 psi!!! Anyone else have this problem with the Procharger? I recall someone saying one of their hoses came loose. I'll have to check this. I was getting 7 psi before and now I'm not. What do you think? Jesse?


__________________

Dr Bonz

iTrader: (1)

What do you all think of those times? The 1/4 was a little slow IMO but the "trap" was pretty good. Goes to show how much power this thing seems to put out. With better drag tires it would be an awesome 1/4 mile.

I listened for any air leaks today and couldn't hear anything. I will do a few more runs and see what my boost gauge shows. I can't see it when I do my runs since it is in my center console. I have to rely on the memory function. Perhaps I hit the button wrong and got the wrong reading. I'll have to try again.

ravaz

iTrader: (1)

These things arent really that accurate, I guess it's a good baseline or something, but compare it to track times, it's never the same.

GurgenPB

iTrader: (2)

No that's only for HT/Torque measurementsAlso, the picture above is the OLD one, You need to get the new one, the PRO competition model, that's the latest and greatest!!! The one for 250 bucks

Gurgen

roark

iTrader: (2)

I've been using my G-tech Pro Competition to measure the results of my mods. Here are my findings.

1) If you perform all of your runs at the same location making sure to run both ways and making comparisons with identical fuel load, tire pressure, and driver weight (winter is coming) then the accuracy is very good.

I've actually removed some of the mods I made to my CAI because they gave top end speed/HP/TQ improvements, but cost me down low. This is not good for autocross.

2) If you weigh your car on a scale (I have a friend at the local land fill) before each run to make sure your loading is the same, you will improve your accuracy.

3) while the G-tech Pro Comp. has a built in thermometer to adjust the calibration of the accelerometers, it can't compensate for colder (denser) air so make sure your runs are all within about 10 degrees ambient air temperature.

4) I'm not all that impressed with the PC software for collecting and comparing runs. First, the file transfer seems to lock up often, and I'd really like to be able to see more information between runs. I have not updated my software in 5 months, so some of these gripes may be fixed.

6) I'm also anxiously waiting for the road racing software, since I Autocross and would like some more objective data to help me improve myself and the car.

7) I've used the G-Tech on many of my friend's cars as well, and since it will allow you to program up to 4 vehicles, it does not take that long to move from one to the other. This is great for comparison runs when we have airfield time.

8) Any of these products are only as good as the baseline you use for comparison. I'd recommend a set of runs with no modifications to the car to store away first, so you can really get a feel for how the car is/isn't improving with each modification you make.

9) while these products are not a substitute for dynos, they are a very good tool for testing minor modifications, or mods between dyno pulls.

Roark

D'oh

Here's some info for you directly from the MFG:

http://www.escortradar.com/gtimer_faq.htm

http://www.gtechpro.com/

You can find the manuals at both sites and read through them for some very good details.

Roark,
With the current firmware, what kind of data can you store for road racing applications? Lateral G's? Individual Accelerometer readings? Engine speed? Vehicle Speed? What do you hope to see in the AutoX/RR firmware addition?

I'm just about ready to buy this thing, but I want to know what I will be able to do with it (other than the 1/4 mile and HP stuff). What do you use yours for?

Thanks,
D'oh!

JimH

Doc, Quick question. Early reports were of high noise levels on the blowers. Was it so on yours? If so, how many miles on yours and has it quieted down any? I know one adjusts to the car noises, but any change afayk? Thanks, Regards, Jim

bellox

I used my gtech comp to compare Z-tube to CAI install and plotted the dyno chart:

Chart

Please note, the readings are relative only. Just used the same street which was not perfectly level, on the same day for both.

zxsaint

Geez, you guys are horrible. Now I have to get one of these.

My wallet hates this forum.

Dr Bonz

iTrader: (1)

Jim: The Procharger does have a nice SC whine to it and it did quiet down a little but it is still there. If you have music on in the car you don't even hear it though.

I have heard that others who have tried this G-Tech have found that it is VERY accurate as compared to timed runs at the track.

As far as I know, the Competition Pro model is no more accurate than the one I got. It only has more bells and whistles and you can integrate it with your computer.

GurgenPB

iTrader: (2)

Roarke,

You just confirmed my fear - the CAI loses low end torque!!! If understand you correctly, that is.

That's wha I will probably be doing. Whatkind of improvement did you see swapping out the cai for the stock tube. Please post some graphs, Much appreciated.

Gurgen

roark

iTrader: (2)

Actually, I saw across the band improvements with my Nismo (aka AEM) CAI as it came. (6.2 rwHP and .1 second off my 0-60 time)

After that, I added a ram to force more air into the cavity from the front grill. That improved HP & TQ across the board as well. (another 1.0 HP increase)
https://my350z.com/forum/showthread....threadid=44933

Then I added a bulkhead to block engine hot air from getting into the cavity (around the uptube) and that also showed very slight improvement across the board. (.5HP increase)

Then I tried one more thing. I blocked all of the holes in the fender liner using aluminum tape. My idea was that I could actually create slight pressure in the cavity at speed through the ram. It did just that, but the losses at low speed were not acceptable to me, since I autocross.

I'll post some of the G-Tech images soon.

GurgenPB

iTrader: (2)

Nice work

thanks a lot, much appreciated

Gurgen

roark

iTrader: (2)

Gurgen,

I've updated that thread with pics of the shield, fender liner and screen shot from the G-Tech software.

https://my350z.com/forum/showthread....515#post484515