 G-tech meter, got it!, How many g's can you pull???? |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
  |
| crash914 |
 Oct 11 2003, 04:30 PM
Post
#1
|
|
its a mystery to me  Group: Members Posts: 1,826 Joined: 17-March 03 From: Marriottsville, MD Member No.: 434 Region Association: MidAtlantic Region  |
(IMG:style_emoticons/default/aktion035.gif) Received the g-tech meter on Friday, just 2 days from order for $50.00. Thanks for the link.
Ok, I can brake at .96 G's, accelerate at .31 (IMG:style_emoticons/default/mad.gif) turn at over 1.2 (IMG:style_emoticons/default/cool.gif) .. What can you do?????? I know you 6 boys will have me in acceleration...but..... I am running falken azenis 205.50.15's at 28# on all 4 corners.....175 # rear springs, 23mm front bars and both sway bars.... Lets see what you got!!! herb |
   |
 
|
| ArtechnikA |
Oct 11 2003, 04:47 PM
Post
#2
|
|
rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
QUOTE(crash914 @ Oct 11 2003, 02:30 PM) (IMG:style_emoticons/default/aktion035.gif) Received the g-tech meter on Friday, just 2 days from order for $50.00. Thanks for the link. Ok, I can brake at .96 G's, accelerate at .31 (IMG:style_emoticons/default/mad.gif) turn at over 1.2 (IMG:style_emoticons/default/cool.gif) .. What can you do?????? I know you 6 boys will have me in acceleration...but..... I am running falken azenis 205.50.15's at 28# on all 4 corners.....175 # rear springs, 23mm front bars and both sway bars.... Lets see what you got!!! herb braking at 3x accel is pretty typical. i'm skeptical of your lateral number tho... was that a steady-state skidpad number ? i could believe a sudden, transient-type turn, but i'm not sure i'm ready to accept 1,2g on DOT tires... also not sure why you think 6's are faster in accel. size for size, the 4's low-range torque tends to give it better accelleration until the 6's high-end takes over. stock 2,0 /4 vs stock 2,0 /6, the /4's quicker under 70 as many AX wins attest. still, there's more to life than the stoplight Grand Prix and i ain't givin' up my 6 :-) ... |
|
|
|
| Charles Deutsch |
Oct 11 2003, 06:10 PM
Post
#3
|
|
Unregistered |
What are your 0 to 60 mph and 1/4 mile times? Those numbers will give us a very good idea if the g-tech is being truthful.
|
|
|
|
| mskala |
Oct 11 2003, 08:55 PM
Post
#4
|
|
R Group: Members Posts: 1,925 Joined: 2-January 03 From: Massachusetts Member No.: 79 Region Association: None 
|
QUOTE accelerate at .31 Okay Herb, you made me interpret my own accel graph. I can do 0.57g in 1st, 0.37g in 2nd. That was before I had the carbs worked out, and on the street tires 205/55. If I had a sequential modern box I could save tons of time on accel (IMG:style_emoticons/default/smile.gif) but hey it's fun to own an old car. |
 |
|
| crash914 |
Oct 12 2003, 03:28 PM
Post
#5
|
|
its a mystery to me Group: Members Posts: 1,826 Joined: 17-March 03 From: Marriottsville, MD Member No.: 434 Region Association: MidAtlantic Region |
Those are the numbers that I got the first drive with the g-tech.....I need to do a complete skid pad, accel test, etc....
The braking is real. Repeated several times. Accel and laterial need more confirmation. Still, I want to corner at over 1g..... (IMG:style_emoticons/default/laugh.gif) |
|
|
|
| Charles Deutsch |
Oct 12 2003, 04:11 PM
Post
#6
|
|
Unregistered |
QUOTE(crash914 @ Oct 12 2003, 02:28 PM) Those are the numbers that I got the first drive with the g-tech.....I need to do a complete skid pad, accel test, etc.... The braking is real. Repeated several times. Accel and laterial need more confirmation. Still, I want to corner at over 1g..... (IMG:style_emoticons/default/laugh.gif) You're killin' me. My g-tech should be here this week and I'm dyin' to know how accurate it is. Get out there and do the acceleration tests. (IMG:style_emoticons/default/driving.gif) |
|
|
|
| ArtechnikA |
Oct 12 2003, 04:32 PM
Post
#7
|
|
rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
QUOTE(crash914 @ Oct 12 2003, 01:28 PM) The braking is real. Repeated several times. Accel and laterial need more confirmation. Still, I want to corner at over 1g..... (IMG:style_emoticons/default/laugh.gif) it's a 2-axis accellerometer, yes ? each axis needs its own calibration and correction factors. since you're confident in the braking number, try mounting the device in a succession of 90-degree change of position. the numbers should be independent of orientation ... (everybody wants to corner at >1 g :-) ...) |
|
|
|
| seanery |
Oct 12 2003, 05:49 PM
Post
#8
|
|
waiting to rebuild whitey! Group: Retired Admin Posts: 15,852 Joined: 7-January 03 From: Indy Member No.: 100 Region Association: None |
Mine came in on Thursday. The teener isn't drivable now though! (IMG:style_emoticons/default/ohmy.gif)
|
|
|
|
| Mr.C |
Oct 13 2003, 05:19 AM
Post
#9
|
|
Easy does it Group: Members Posts: 611 Joined: 31-December 02 From: Central Cal Member No.: 61 Region Association: None |
Can you share the link again I have been away for some time.
|
|
|
|
| seanery |
Oct 13 2003, 06:55 AM
Post
#10
|
|
waiting to rebuild whitey! Group: Retired Admin Posts: 15,852 Joined: 7-January 03 From: Indy Member No.: 100 Region Association: None |
|
|
|
|
| ss6 |
Oct 13 2003, 07:58 AM
Post
#11
|
|
fun city... Group: Members Posts: 261 Joined: 2-February 03 From: Western Connecticut Member No.: 221 |
Guys, I'm curious - what is the G-tech really good for? How does knowing acceleration improve your tuning or driving (road course, not burn-outs)?
|
|
|
|
| ArtechnikA |
Oct 13 2003, 09:05 AM
Post
#12
|
|
rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
QUOTE(ss6 @ Oct 13 2003, 05:58 AM) Guys, I'm curious - what is the G-tech really good for? How does knowing acceleration improve your tuning or driving (road course, not burn-outs)? as with all instruments, Step Zero is establish a baseline. then, after each change, re-run and compare to baseline conditions. if things get worse, un-do what you did and see if you're back on the baseline. (if not, you perturbed something else...) if yes, the change you made was not effective. can you pull more g's through a corner with more or less tire pressure? tighter or looser antiroll bar settings. softer or stiffer damper settings ? i don't find the braking number very helpful unless you're fiddling with brake bias. the accel number of course helps you determine if that jetting, or timing, or air filter change really netted you a measurable performance improvement. (assuming all the other variables - like temperature, humidity, fuel load, driver weight... - remained constant too... |
|
|
|
| Charles Deutsch |
Oct 13 2003, 10:31 AM
Post
#13
|
|
Unregistered |
I ordered one but I can't help but feel a little skeptical because the price seems too good to be true. G-TECH sell it on their web site for $140 so how can this guy sell them on ebay for $50? I hope they've been properly calibrated and are accurate.
|
|
|
|
| Charles Deutsch |
Oct 13 2003, 10:36 AM
Post
#14
|
|
Unregistered |
QUOTE(ss6 @ Oct 13 2003, 06:58 AM) Guys, I'm curious - what is the G-tech really good for? How does knowing acceleration improve your tuning or driving (road course, not burn-outs)? It will also tell you your drive wheel hp which is good to know when tuning or modifying your car. This might help you to get your motor's settings in the ballpark before you take it in for proper dyno tuning. |
|
|
|
| fiid |
Oct 13 2003, 10:44 AM
Post
#15
|
|
Turbo Megasquirted Subaru Member Group: Members Posts: 2,827 Joined: 7-April 03 From: San Francisco, CA Member No.: 530 Region Association: Northern California |
I just ordered one. For $50 it's sort of a no-brainer for me. I do like the look of the competition model though. I wonder if it's possible to hack a serial port into the cheap one and get a laptop doing datalogging to deduce fun stats. Might be possible to combine the megasquirt data with the Gtech data........??????
Anyone got any cool ideas? Is it possible to get a datastream out of this thing? Fiid. (IMG:style_emoticons/default/boldblue.gif) |
|
|
|
| crash914 |
Oct 13 2003, 03:04 PM
Post
#16
|
|
its a mystery to me Group: Members Posts: 1,826 Joined: 17-March 03 From: Marriottsville, MD Member No.: 434 Region Association: MidAtlantic Region |
I got mine....in factory box with instructions....never opened, etc....I think that they can't move them for $139.
After playing with it, it is worth ~$50.00 I am looking at it for the baseline vs. improvement factor. change brake pads, what happened. Put in a v-8, what happens.... (IMG:style_emoticons/default/rolleyes.gif) herb |
|
|
|
| fiid |
Oct 13 2003, 03:09 PM
Post
#17
|
|
Turbo Megasquirted Subaru Member Group: Members Posts: 2,827 Joined: 7-April 03 From: San Francisco, CA Member No.: 530 Region Association: Northern California |
QUOTE(crash914 @ Oct 13 2003, 01:04 PM) That's exactly what I'm thinking. Also - I can run it in my girlfriend's miata to see how it stacks up to the 914 in the corners. It will be interesting to get a quantitative analysis to go with the "ass-in-seat" accelerometer. Should help a lot with sway bar settings and the like. Does yours have any sort of computer interface? Fiid. |
|
|
|
| ArtechnikA |
Oct 13 2003, 03:22 PM
Post
#18
|
|
rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
here's my question - how can an accellerometer-based device produce valid data when it's not solidly mounted to the vehicle in question. even when i see the videos, it looks like it swings around on that suction-cup mount like a pendulum do. so what you've got is an accel in an accel - how stable can that be ?
unless the whole design concept is to have a position reference -inside- the box, measuring the motion of the case around it... in which case i think there'd be way too many variables (e.g. suction-cup rubber stiffness...) for the data to be valid... i understand the suction-cup plumb-bob mounting is convenient - but how can it possibly be giving you valid data in transient maneuvers ? what does the mounting information suggest? must it be flixibly mounted ? can you bolt it to the frame for improved accuracy ? |
|
|
|
| Dave Avery |
Oct 13 2003, 03:37 PM
Post
#19
|
|
Unregistered |
I just got one of these, waiting on a cable for my Kyocera smart phone to use it.
www.pdyno.org Connects to the palmpilot (or palmphone in my case) and logs data. The mini sells for $149, but he has them on ebay for $49. Audiworld left a nice review : click here Not affiliated with Hamilton, but I thought the cool factor was worth mentioning. -DMA |
|
|
|
| Charles Deutsch |
Oct 13 2003, 04:17 PM
Post
#20
|
|
Unregistered |
QUOTE(ArtechnikA @ Oct 13 2003, 02:22 PM) here's my question - how can an accellerometer-based device produce valid data when it's not solidly mounted to the vehicle in question. even when i see the videos, it looks like it swings around on that suction-cup mount like a pendulum do. so what you've got is an accel in an accel - how stable can that be ? unless the whole design concept is to have a position reference -inside- the box, measuring the motion of the case around it... in which case i think there'd be way too many variables (e.g. suction-cup rubber stiffness...) for the data to be valid... i understand the suction-cup plumb-bob mounting is convenient - but how can it possibly be giving you valid data in transient maneuvers ? what does the mounting information suggest? must it be flixibly mounted ? can you bolt it to the frame for improved accuracy ? When I watch MotorWeek on the Speed channel and they test the cars through the slalom I can see that they have a similar device mounted to the windshield. |
|
|
|
|
2 User(s) are reading this topic (2 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 20th May 2024 - 05:39 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.