BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      09-19-2008, 10:53 AM   #1
amk2912
Lieutenant Colonel
amk2912's Avatar
Australia
21
Rep
1,663
Posts

 
Drives: '10 X5 40d & '12 F10 520d
Join Date: Dec 2007
Location: Perth

iTrader: (0)

How do you use a GPS to measure 0-100?

I've often read in forums that you can use a hand-held GPS to measure 0-100kmh times. I've not been able to find how to do this.

Does anyone know how to do this? Thanks.
__________________
2012 BMW F10 520d M-Sport
2010 BMW E70 X5 xdrive40d

Appreciate 0
      09-19-2008, 10:41 PM   #2
d3syd
Major
d3syd's Avatar
Australia
17
Rep
1,475
Posts

 
Drives: 135i MT, LMB, ProNav
Join Date: Nov 2007
Location: Scamander, Tasmania

iTrader: (0)

Garage List
2008 135i Coupe  [0.00]
I don't think many or any regular Nav GPSs can do this. There are performance measuring devices out there that are GPS based though.
__________________

Fun Car: 135i Manual LeMans Blue / Beige Leather / Grey Poplar / pro nav / euro plates. Delivered 24 June 08
Family Car: Land Rover Discovery 4 SDV6
Spare Car:
Volvo V70 Sydney Car: MB 420SEL
Appreciate 0
      09-20-2008, 02:17 AM   #3
mistermojorizin
Lieutenant Colonel
mistermojorizin's Avatar
19
Rep
1,658
Posts

 
Drives: 135i
Join Date: Apr 2008
Location: Los Angeles

iTrader: (0)

just pick up an escort gt-1 for $40 from amazon. it lets you know the 0-X speed in intervals of 10, and it also tells you what acceleration numbers you are pulling in each gear. very easy to check if a tune has made even the most minor difference with that feature, because its not launch dependent. very consistent.
__________________

"KOPEYKA" /// Titanium Silver / Black Leather / Gray Poplar / Sport Package / Premium Package / 6MT / Feb 08 Production
Appreciate 0
      09-20-2008, 06:38 PM   #4
takahashi
Retired trackie
takahashi's Avatar
Australia
20
Rep
1,529
Posts

 
Drives: 1///M
Join Date: Jul 2008
Location: Melbourne, Australia

iTrader: (0)

Own a Nokia SmartPhone (N95 and alike), download a free program called racechrono.

If you get a 5Hz GPS like Qstarz extreme BT-Q818, it will be more accurate. I also use a OBD bluetooth sensor to read the OBD reading as well.

Manage to test WAY's car under 5 sec from 0-98kmh.
__________________
TAKA 一仔BLOGブログ:
BMW 1 series M 2011! Delivered 18/11/11.
Appreciate 0
      09-20-2008, 07:04 PM   #5
smarm
Worsier then Tupac dying.
9
Rep
875
Posts

 
Drives:
Join Date: Apr 2008

iTrader: (0)

Does racechrono take into account the lag in re-transmitting the co-ordinates from the gps unit to the phone/computer via BT?

Because surely the BT would add a significant amount to the latency?
__________________
135/M Sport/Jet Black/Business Nav/Logic 7/Sunroof

Quote:
If you write 'Wash Me' on my car, I'll carve 'Resuscitate Me' into your chest
Appreciate 0
      09-21-2008, 12:32 AM   #6
takahashi
Retired trackie
takahashi's Avatar
Australia
20
Rep
1,529
Posts

 
Drives: 1///M
Join Date: Jul 2008
Location: Melbourne, Australia

iTrader: (0)

Does it matter? if the lag is constant; 0-100 will still be the same. I mean if there is a lag of detecting the starting point, if the same lag happens at 100kmh, that is ok. So it is not the major problem here. From experience looking at the GPS speed itself on screen. It is very quick and almost instant.

The problem is really getting the GPS realising the car is starting off from standing start. Most GPS unit has static navigation function so when they plotting graph in traffic and do not plot too many dots around a static point (when the object/car is motionless). That is why never use the internal GPS on the N95 for the 0-100kmh, rather do 80-120kmh or something similar.

That is why Antii from RaceChrono incooperate the OBD function. The OBDkey can get 4Hz in most car (and in my RX-8 I manage to get 8Hz), so they update data a lot of times. It will be more accurate.
EDIT: OBD = on board diagnostic unit. It will get the speedo from the ECU itself.

The unit is best when use in lap times; it is proven even in the 1Hz mode that the lap time is within 0.1 second of the AIMS infrared transponder or the real magnetic transponder on the racetrack (natsoft ones).
__________________
TAKA 一仔BLOGブログ:
BMW 1 series M 2011! Delivered 18/11/11.
Appreciate 0
      09-21-2008, 01:10 AM   #7
amk2912
Lieutenant Colonel
amk2912's Avatar
Australia
21
Rep
1,663
Posts

 
Drives: '10 X5 40d & '12 F10 520d
Join Date: Dec 2007
Location: Perth

iTrader: (0)

Errr...well, I'm lost.

I've been setting the speed limit warning on iDrive to 100kmh and telling the wife to hit GO on a stopwatch when I bury the accelerator and STOP when she hears the "ding ding" - too simple??
__________________
2012 BMW F10 520d M-Sport
2010 BMW E70 X5 xdrive40d

Appreciate 0
      09-21-2008, 01:48 AM   #8
smarm
Worsier then Tupac dying.
9
Rep
875
Posts

 
Drives:
Join Date: Apr 2008

iTrader: (0)

Quote:
Originally Posted by amk2912 View Post
Errr...well, I'm lost.

I've been setting the speed limit warning on iDrive to 100kmh and telling the wife to hit GO on a stopwatch when I bury the accelerator and STOP when she hears the "ding ding" - too simple??
You could always just use the stopwatch in the idrive

taka, I understand that, but there's going to be a lag when trying to hit a certain speed etc. But if it's getting data from the OBD then that's sorted that.
__________________
135/M Sport/Jet Black/Business Nav/Logic 7/Sunroof

Quote:
If you write 'Wash Me' on my car, I'll carve 'Resuscitate Me' into your chest
Appreciate 0
      09-21-2008, 01:51 AM   #9
SimonB
2nd Time BMW Owner
Australia
27
Rep
1,660
Posts

 
Drives: 335i M-Sport, optioned up!
Join Date: May 2008
Location: Perth, Western Australia

iTrader: (0)

Quote:
Originally Posted by amk2912 View Post
I've been setting the speed limit warning on iDrive to 100kmh and telling the wife to hit GO on a stopwatch when I bury the accelerator and STOP when she hears the "ding ding" - too simple??
Sorry, I had to laugh at the mental picture!
__________________
MY14 335i M-Sport, EBII, Merino leather (Individual) black with cashmere stitching & piping, HUD, Adaptive Headlights, HBA, HK Audio, Park Assist, M-Sport Brakes, Driver Assistance Pack, Lane Departure Warning, Adaptive Cruise Control, Sunroof, DAB, Comfort Access, VSS, Adaptive Suspension and MORE!
Appreciate 0
      09-21-2008, 02:09 AM   #10
amk2912
Lieutenant Colonel
amk2912's Avatar
Australia
21
Rep
1,663
Posts

 
Drives: '10 X5 40d & '12 F10 520d
Join Date: Dec 2007
Location: Perth

iTrader: (0)

You'd think the Performance Steering Wheel would have a 0-100 measurement function??!!
__________________
2012 BMW F10 520d M-Sport
2010 BMW E70 X5 xdrive40d

Appreciate 0
      09-21-2008, 02:41 AM   #11
takahashi
Retired trackie
takahashi's Avatar
Australia
20
Rep
1,529
Posts

 
Drives: 1///M
Join Date: Jul 2008
Location: Melbourne, Australia

iTrader: (0)

Quote:
Originally Posted by smarm View Post
You could always just use the stopwatch in the idrive

taka, I understand that, but there's going to be a lag when trying to hit a certain speed etc. But if it's getting data from the OBD then that's sorted that.
I will take your offer of driving one a day. I will bring my phone, OBDkey and GPS to test it out. I need a manual one to compare with, Wayne's was tuned when I tested his.
__________________
TAKA 一仔BLOGブログ:
BMW 1 series M 2011! Delivered 18/11/11.
Appreciate 0
      09-21-2008, 05:49 AM   #12
TimMc
Lieutenant Colonel
TimMc's Avatar
Australia
19
Rep
1,863
Posts

 
Drives: 135i SCT N54
Join Date: Aug 2008
Location: Brisbane, Australia

iTrader: (0)

Quote:
Originally Posted by amk2912 View Post
You'd think the Performance Steering Wheel would have a 0-100 measurement function??!!
Indeed it does. And 400m and 1/4 mile times. Hopefully I find out how to use it in 5 weeks time...
__________________
Driving - Man 135 (LeMans/Black). BMW Perf SW & SSK. Quaife LSD, KW V2s, Ground Control camber plates, M3 front Control Arms & SB, Helix IC, AR DPs, PROcede V5, ER CP, Forge DVs, BMS OCC, Setrab OC, P3 Gauge.
Riding - ZX14R Kwaka, Avanti Aggressor, Malvern Star Equipe, Mini Mal.
Proudly from the Shire.
Appreciate 0
      09-21-2008, 04:15 PM   #13
jksgoh
Major
jksgoh's Avatar
27
Rep
1,299
Posts

 
Drives: 125i coupe
Join Date: Oct 2008
Location: Melb, Vic, Aus

iTrader: (0)

Garage List
2008 E82 125i  [0.00]
just read in wheels that the iphone has some program that can calculate times and gs using its accelerometer (???). no idea how accurate it is though.
__________________
Appreciate 0
      09-21-2008, 06:22 PM   #14
takahashi
Retired trackie
takahashi's Avatar
Australia
20
Rep
1,529
Posts

 
Drives: 1///M
Join Date: Jul 2008
Location: Melbourne, Australia

iTrader: (0)

Yes it does. It is called Dynolicious. The limit of the iPhone accelerometer and in built GPS is kind of make me wonder if they can achieve any accuracy. Anyhow...

http://www.autoblog.com/2008/07/29/d...ormance-meter/
__________________
TAKA 一仔BLOGブログ:
BMW 1 series M 2011! Delivered 18/11/11.
Appreciate 0
      09-21-2008, 06:38 PM   #15
smarm
Worsier then Tupac dying.
9
Rep
875
Posts

 
Drives:
Join Date: Apr 2008

iTrader: (0)

Track day is much better then dynolicious.

We were using it down at PI on the grid to test the accuracy. It seemed somewhat accurate. Not being able to log the g-forces though was annoying.
__________________
135/M Sport/Jet Black/Business Nav/Logic 7/Sunroof

Quote:
If you write 'Wash Me' on my car, I'll carve 'Resuscitate Me' into your chest
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 03:57 PM.




1addicts
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST