hypnodoc It's All In Your Mind Gold Donating Members 2,198 Member For: 20y 11m 7d Gender: Male Location: Melbourne Posted 17/11/10 12:35 AM Share Posted 17/11/10 12:35 AM Meh, downloaded the free POS and when I tried to calibrate it just kept saying wrong direction with a big red arrow pointing to *beep* knows where. Tried 3 times and deleted it. Guess for $15 it would be ok as a guesstamator IF THE STINKING THING WOULD WORK. Link to comment Share on other sites More sharing options...
Tim Member 142 Member For: 16y 2m 24d Posted 17/11/10 11:18 AM Share Posted 17/11/10 11:18 AM Meh, downloaded the free POS and when I tried to calibrate it just kept saying wrong direction with a big red arrow pointing to *beep* knows where. Tried 3 times and deleted it. Guess for $15 it would be ok as a guesstamator IF THE STINKING THING WOULD WORK. Which one did you download? The free Dynolicous from Bosch that I downloaded was very simple to calibrate. Link to comment Share on other sites More sharing options...
Tim Member 142 Member For: 16y 2m 24d Posted 21/11/10 01:10 AM Share Posted 21/11/10 01:10 AM AutoSpeed - The Best Performance DeterminantAn interesting article on Autospeed on comparing power to weight and 1/4 mile speed. Provides a way to estimate (with a rather high acuracy) power at your engine provided you know your 1/4 mile speed and your weight. Would be intersted to see if people on here come up with results that match.I assume the phone dynos use a similar modeling technique to work out power at the wheels. Link to comment Share on other sites More sharing options...
hypnodoc It's All In Your Mind Gold Donating Members 2,198 Member For: 20y 11m 7d Gender: Male Location: Melbourne Posted 21/11/10 05:27 AM Share Posted 21/11/10 05:27 AM Which one did you download? The free Dynolicous from Bosch that I downloaded was very simple to calibrate.Hey Tim, it was the free one from iTunes. Link to comment Share on other sites More sharing options...
MYBAXRT Member 158 Member For: 15y 7m 1d Gender: Male Location: nowra Posted 21/11/10 05:47 AM Share Posted 21/11/10 05:47 AM a good app that I use on my iphone is called Trackday $12.00or you could jailbrake your phone and download it for free using installous Link to comment Share on other sites More sharing options...
Rusty XR6T Donating Members 516 Member For: 14y 6m 5d Gender: Male Posted 25/11/10 05:45 AM Share Posted 25/11/10 05:45 AM how does it use GPS when the iphone/ipod doesn't have genuine GPS? GPS (global positioning system) needs a chip and antenna that will recieve lat and long from a satellite, interpret the data and give you as best a reading as it can, the more reference points it pulls from the satellites the more accurate your position is.The so called "GPS" in iphones is actually called AGPS or assisted GPS working off the triangulation of mobile phone towers, accurate to maybe 50 meters if it can get more than 3 towers.Without GPS it has no way to determine distance traveled, without knowing the distance travelled how does it work out your 0-100 time?the ihpone/ipod does not have a G sensor, it has an accelerometer, they are completely different! an accelerometer cannot give you actual G force readings, it can get close but not very accurate.doing a few calculations based on the inaccurate data its receiving from said senors will in turn give you bad readings to the user.just my 2 cents... I know this will cause some issues Link to comment Share on other sites More sharing options...
Tim Member 142 Member For: 16y 2m 24d Posted 29/11/10 09:33 AM Share Posted 29/11/10 09:33 AM doing a few calculations based on the inaccurate data its receiving from said senors will in turn give you bad readings to the user.Any info on how "inaccurate" it is? Link to comment Share on other sites More sharing options...
Tim Member 142 Member For: 16y 2m 24d Posted 29/11/10 10:06 AM Share Posted 29/11/10 10:06 AM Quick search reveals an error of less than 2%. Not too bad. 0.1 second error for a 0-100 time of 5 seconds. Heaps better than what could be hand timed. Link to comment Share on other sites More sharing options...
Rusty XR6T Donating Members 516 Member For: 14y 6m 5d Gender: Male Posted 29/11/10 10:19 AM Share Posted 29/11/10 10:19 AM The stated error levels are interesting, so are the error levels of digital tv... Those stated and those experienced can be contradictory, but if your getting the results go for it! Link to comment Share on other sites More sharing options...
Reidos Member 32 Member For: 13y 22d Posted 28/09/11 06:41 AM Share Posted 28/09/11 06:41 AM I tried out this app with my work forklift and it was quite accurate reading a top speed of 20kph, which is correct and also a correct kw rating of 33. I am yet to try it out in my car. I gave if a test but due to the road being damp it took 7 seconds to reach 100 and rated it as 179kw! Haha! It's all for fun though. Link to comment Share on other sites More sharing options...
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