I just got an iPhone for the holidays. Went to the app store and found "Dynolicious". It uses the accelerometer in the phone to determine whp, 0 - speed in 10 mph increments, distance and speed at 60, 330, 660, 1000, 1320 feet. Plus max speed and several other settings.

I bought the app and tested it against my buddy's drift box. Speeds were spot on- difference was in the times and from what I can tell, the difference starts at the launch (has to do with rollout) and then remains constant. I trapped 119.1 mph on both units.

The drift box is about .1 off in the 1/4 mile as per magazine testing. So, it is pretty darn accurate. Atter buying the app and using it, I ingested a large holiday meal and then, will ridding myself of same in the "library", i found that car and driver just tested dynolicious. If you have an iPhone, check this thing out. Although it is not perfect, it will give you a baseline and let you track upgrades and progress. Have fun

 

The track day app if good for road racing too. Union Tomato is the producers, funny name, the unit does lap times, I thin it also does qtr mile, g force and some others 11.99.

 

That sounds cool!!!

 

Thanks, I'll check it out!

 

It's been around for about a year now. Pretty nifty little tool for $13 (used to be $10.)

 

I have the app. I used it at the track and the 1/4 was off by a fewbut not much. Its the 60 foot and the 330 and the 1/8 that its off . But for $13 you cant go wrong.

 

Guys there is a app for the IPhone that you can get a WIFI ODB adapter to plug into the ODB port in your car and the app connects to it and you can check engine codes and reset them (yes I know we can reset ours through the DIC anyway) and it also tracks all your sensors in the car as well as speeds, times, et and other things. It is called Rev, they have a Lite version which is free which gives you access to some of the features, but the full pay version is required to use the ODB adapater. Here is the their website. I am hoping they will make the software able to tune the car as well like HPTuners.

http://www.devtoaster.com/products/rev/

 

I just downloaded Dynolicious.

I can't wait to go out and test it.

For $12.99, I can't really see how I can go wrong with this.

The iPhone is insane.

 

The guys at the AT&T store were dying when they saw Dynolicious and the "timeslips" from my car. One of the guys there had an M3 that he thought was fast until he saw the results on the iPhone. He then downloaded Dynolicious for his own fun.

I've done this numerous times with my iPhone - both in my Corvette (consistent 12.0 - 12.2 at 118.7 - 120.3 mph with a LS2 6 speed manual, a tune and bolt ons (CAI, full exhaust) and in my bone stock 08 Tahoe (16.1 - 16.4 with 85 - 88.8 trap speeds). The 1/4 mile results are very accurate - the more I use it, the more I have learned how to make it more accurate and consistent. The hpr results vary too much for my liking. Maybe it is because I have the phone temporarily velcro'd in place on the center console.........

I am in the process of making an iPhone mount for Dynolicious purposes (and for general use as well) using the cup holders and a flat piece of ABS as the level mounting area for the iPhone and one of those old fashioned "gripper" cell phone mounts screwed to the ABS to keep/grip the iPhone level and in place. It will be crude at first but once I get the shape set (want to keep it clear of the shifter with no chance of knocking into it) and then we will see how pretty I can make the mount. Of course, I will find a way to do it in my spare time (it really doesn't exist).

With a solid, rattle free mount, the real test will be to go to E-town or Atco to check the accuracy of Dynolicious against the timing lights.......

 

Here's my first run. I suck at launching. Wheels spun.

Data sets can't yet be exported from dynolicious, so I've typed in some of the info below the graph.



0-30 2.77 sec
0-60 5.07 sec
0-100 8.90 sec

60' 2.90
1/8 mi 8.75@100.3
1/4 mi 12.64@133.0- is this speed number suspect?

Max Accel 1.18g
Pk HP 399- my dyno sheet from the local shop said 398, so this is close!

 

100 in the 1/8 and 133 in the 1/4 is way off for a 400hp car.

 

Scotty:

Two things lead me to believe that you have inconsistent readings. 1.17g reading and 133 in the 1/4 mile.

When you state that you suck at launching and I see 1.17 and 133 mph, I can only surmise that the phone was not 100% securely mounted. I did some messing around with the phone while at WOT and determined that even small movements of the phone result in erratic readings like yours.

Your car, presuming 3:42 gears, should trap in the 120 range with 400 whp. The 133 is a false reading. Secure your phone in the car and retry.