Who's gonna be first to get 1/4 mile times using an iphone?

[evobeatsti]

i have it and it got accurate 0-60 times and close on hp in my x5

[NocturnalEVO]

im' downloading this now, but just so you guys know.. there's another program out in the appstore called "g-tac"

It does most (not all) of the things that dynolicious does, but it only costs $4.99

Here's some pics I found off an Audi forum..

[Tnnrx7]

I'll take Dynolicious for it's name UI and more features.

http://videos.streetfire.net/video/i...0-9961001970b5

[NocturnalEVO]

Here's another video:

Dynolicious vs G-Tec Pro RR

http://videos.streetfire.net/video/i...Pro_174609.htm

[dudical26]

Someone needs to take this with them to a track. See what time it says and what time you actually run.

[Hardware]

Originally Posted by KevinD

accelerometers measure acceleration. if you integrate acceleration over time you get velocity. if you integrate velocity over time you get position. once your position is 1/4 of a mile, you stop the timer and you'll know your 1/4mile time. acceleration G's are simply what the sensor itself reads. and the velocity after the 1/4 is the velocity you've reached at the 1/4mile.

the accelerometer itself is most likely a 3 axis accelerometer (like a wii-mote). if you hold the phone flat, it knows which way is down by the acceleration of gravity (which will be 1g in the down axis). the other two axis will be zero assuming you are not accelerating. if you start driving forward, the accelerometer in the forward/backward direction will begin sensing acceleration based off how fast you start moving. now you have two axis readking acceleration. last, if you turn hard, the side to side accelerometer will read acceleration as well and now all 3 axis of your phone are reading acceleration.

if you tilt the phone a bit before you start, the phone should be able to calibrate based off all 3 axis, knowing that gravity will always be 1G down (for instance if you turn the phone 90deg sideways, the left/right accelerometer will now be pointed down, and will read 1G.

Nice write up! Thanks!

[slicedbreadno2]

My Friend has an Iphone I definitely have to make him get this.

[PHDoc19]

I wonder if there is anyone out there that is monitoring these outputs. Hopefully its not a crafty little trick to get speeders.

[derekste]

Originally Posted by PHDoc19

I wonder if there is anyone out there that is monitoring these outputs. Hopefully its not a crafty little trick to get speeders.

I think you're a bit confused how GPS actually works.

Short answer: very very unlikely.

[PHDoc19]

Actually I am not at all confused how GPS works, and its kind of irrelevant since several prior posts state that GPS has nothing to do with it. You may be unfamiliar at how file transmissions work. Anything that is electronically logged on a wireless device that recieves an input or sends an output is subject to interception.

[lexat20]

Originally Posted by PHDoc19

I wonder if there is anyone out there that is monitoring these outputs. Hopefully its not a crafty little trick to get speeders.

[Kwiq Niss]

Originally Posted by lexat20

and you,


and...YOU!!!

[zTargeTz]

My Gtech is very accurate compared to the track, this app is tracking with my Gtech with maybe a 2% difference at most between the two.

done in an 03 cobra

[Shocky]

whoa! this is great! the iphone is becoming a swiss army gadget :P

[Si2EvOX]

Man that is just amazing