I was messing around tonight with a $4.99 app that is able to record 0-60 times 1/4 times skidpad etc. They claim it is accurate for 0-60 times within .08 of a second. It uses the accelerometer in the iphone.

Some results nothing outstanding just examples

May 17, 2010 9:34 PM
Acceleration

0-10 MPH: 0.91 sec
0-20 MPH: 1.68 sec
0-30 MPH: 2.37 sec
0-40 MPH: 3.16 sec
0-50 MPH: 4.63 sec
0-60 MPH: 5.55 sec
Elapsed Time

60': 2.50 sec @ 30.8 MPH
330': 6.14 sec @ 63.6 MPH
Miscellaneous

Max Speed: 67.1 MPH
Max Acceleration: 0.67 G's
Peak Horsepower: 263 HP

1999 corvette
May 17, 2010 9:51 PM
Acceleration

0-10 MPH: 5.05 sec
0-20 MPH: 5.98 sec
0-30 MPH: 6.74 sec
0-40 MPH: 7.46 sec
0-50 MPH: 8.28 sec
0-60 MPH: 9.45 sec
0-70 MPH: 10.38 sec
0-80 MPH: 11.85 sec
0-90 MPH: 12.90 sec
Elapsed Time

60': 6.17 sec @ 19.7 MPH
330': 10.06 sec @ 64.6 MPH
1/8 mi: 12.89 sec @ 88.5 MPH
1000': 15.39 sec @ 92.4 MPH
1/4 mi: 17.77 sec @ 90.4 MPH
Miscellaneous

Max Speed: 92.8 MPH
Max Acceleration: 0.66 G's
Peak Horsepower: 346 HP

Skidpad stuff
1999 corvette

May 17, 2010 9:53 PM
Max Acceleration: 0.37 G
Max Braking: 0.31 G
Max Lateral: 0.20 G

 

Just got the app yesterday. VERY COOL! Downloaded it to a 32GB iPod 3G. The 4.99 version allows you to add multiple vehicles.

Here's what it produced for me (I screwed up the 2nd-to-3rd shift and didn't try to maximize my start from 0).

Also shows I shut down just short of 1/4 mile mark (I was on a little used city street w/no intersections. I was guessing where the 1/4 mile mark would be. Once its saved your run you can upload it to the Bosch site where they'll rank your results against others.

Only mods are Ti exhaust, Blackwing A/C, Velocity stack, smooth air coupler, 160 t-stat, and Chuck Cow PCM tune. I estimated 14% drivetrain loss (Corvette factory says 13% for MN6 but I thought they might being optomistic) + 3300 lbs GW (I might have slightly over estimated weight too).

Blue line is acceleration (g-force). I'm guessing the way you read it is: 200 = 0 and 300 = 1-g




Acceleration

0-10 MPH: 1.85 sec
0-20 MPH: 2.74 sec
0-30 MPH: 3.50 sec
0-40 MPH: 4.30 sec
0-50 MPH: 5.30 sec
0-60 MPH: 6.93 sec
0-70 MPH: 7.88 sec
0-80 MPH: 9.01 sec
0-90 MPH: 11.70 sec
0-100 MPH: 13.05 sec


Elapsed Time

60': 3.41 sec @ 27.7 MPH
330': 7.18 sec @ 59.8 MPH
1/8 mi: 10.09 sec @ 86.5 MPH
1000': 12.62 sec @ 96.8 MPH
1/4 mi: 14.70 sec @ 109.9 MPH


Miscellaneous

Max Speed: 110.2 MPH
Max Acceleration: 0.60 G's
Peak Horsepower: 349 HP

 

I've seen that....Pretty neet stuff!

Chuck CoW

 

I got the G-Tac app a while back

IT's FREE!

 

That's awesome!

 

My fiancee just got an app for tracking acceleration and g-forces that we've mounted to the dash for recording during autocrossing to cross-reference with our video camera footage.

Isn't technology amazing?

Now I just have to remember to press "record" when I get to the line .... I just get too excited, ROFL ....

 

Is a pretty neat app and pretty damn accurate as well. Haven't mounted it to my Vette but Mama's Jetta did a 18.7 1/4mile at 72 MPH and 60ft. better than the OP at 1.97 in a TDI Jetta at full boost.LOL Seriously though! I have found if you use a rubber band to attach the iphone to your rearview mirror it works perfectly and you can start the dyno easier. Anxious to try the Viper Truck and the Vette both.

 

I inserted my iPod into the cutout on the center console then used some blue painters tape to hold in place. The tape doesn't leave any residue.

 

What's the app called again??

 

Search iTunes App store for "Dyno" A 1/2 dozen show up. Pick the one you like. This one is the one from BOSCH; "Light 'em Up!"

 

Much appreciated!

I can see new bragging rights developing from this! lol

Tim

 

Doesn't seem very accurate, wouldn't those be pretty crappy results if so? I need to try one of these apps out myself, think I've got one d/l'ed on my phone and just never tried it... Guess as long as they are consistent they would be good for gauging the effectiveness of mods.

 

Go to Best Buy, they have a very cheap windshield mount that's also good for just holding your phone ($30 I think) that is also very secure.

Same style as the one we use to hold our video cam on the autocross course.

.... and it even stayed put during my little ... uh .... spin this weekend when I got a little too excited 'bout the new Hoosiers (heh heh).

 

Pretty cool stuff here

 

Bringing back a 9 year old thread.