im gonna try it on my iphone with super cracked screen... 2.0

p.s. if you have an iphone get a rubber protector!

 

I saw this app while at the Apple store yesterday. I don't know how accurate it is, but I like the idea. It's like getting your own digital G-Tech.

 

Well per others on the iphone websites, it uses the GPS as well.

Also, a friend used it on their ford lighting, and it said it did 12.7 with better tires, and when they went to the track a while back it got 12.9 with crappy tires.

 

a friend of mine pulled little over 1.0 g on a banked turn and 0.97 on a 60mph non-banked left hander in his 328 coupe sport. It seems pretty accurate. Time to test that thing out in my car.

 

I think the other sites were just wishing it used the gps module. I have the older iPhone with 2.0 update and it works just fine. Haven't done any 0-60 yet (too much traffic) but for the most part it's pretty accurate.

If you turn on the skidpad feature, and then turn it on its side, the reading shows anywhere from .99 - 1.02G. And of course because G means gravity, turning it on it's side shows the acceleration of earth's gravity, which should be 1.0G.

Seems pretty accurate to me.

 

Tried it, and wrote a review here. Pretty fun, can't really tell how accurate it is.

https://g35driver.com/forums/showthr...53#post3285253

 

eh i only got one run in and i WISH my car was that fast lmao. 0-60 5.00 0-100 7.95 lol and 1/4 11.96 @ 155.2! LMAO

 

I'm curious to see the results people get as more and more try this app. I doubt we will see accuracy any where near what is claimed by the developer. I relied heavily on accelerometer readings for a year long design project in college and they are notorious for being inaccurate in these types of applications. They are great for general motion sensing like in the Wii or PS3, but I would not recommend them for these types of specific calculations. I am not familiar with the part used in the iPhone, but would guess that this application sums the acceleration readings in all 3 directions for use in the speed, time and HP calculations. How this is mounted also has a large effect. I think we'll see people with more ridiculous results as stated above. I would also take the results that seem reasonable with a grain of salt.

This does still seem fun to play with, especially due to the price.

 

Marketing garbage.

It’s fine for kicks I guess, but HIGHLY doubtful to be accurate enough to boast about ETs and 60' times.

Unfortunately now we are going to have a whole world of gadget racers claiming they ran XX.XX and have XXX hp

I've used various GPS technologies in the transportation industry and can guarantee none of them are accurate enough to give worthwhile 1/4 ET and speed.

 

Well you can always Calculate horsepower yourself. As long as you know weight, speed and distance.

 

This thing does not use GPS, I dont even understand why everyone keeps thinking that.

It works with the old Iphone and the Ipod touch, neither of which have gps

 

well i thought my run was fairly accurate, now i've never run my g at the track but without adding the weight for me and my friend it said i had a 2.61 60 ft and ran a 10.07 1/8 and a 15.3 1/4 at 95.4 mph on the street launching around 3k how accurate do those numbers sound to you all? i believe it's all in how you set it up. the only part it got wrong in my opinion is whp it said 179 at the wheels i don't know where it should be but i don't think thats right

 

wait, so does this only work for the 3G one or does it work for the previous ones?

 

no i have the old one, but you need to update(Free) to 2.0

 

I think I'm going to give this a try tomorrow. For $12 can't go that wrong. Tomorrow is going to be very similar to when I got my baseline dyno run so that should be a good test of the horsepower reading. My question, whats the stock curb weight? I would look it up but it's late and I feel like being lazy. (car is still totally stock)