Author Topic: Rolling road test - on iPhone!  (Read 7333 times)

Offline Stiggy

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Rolling road test - on iPhone!
« on: 31 July 2008, 23:53 »
Firstly, moderators, feel free to move this to the chat nonsense section (although there will be some mention of a mk5 golf) - just wanted to make sure you guys read this.

I purchased the iphone about the week ago; those of you who have one will know that you can now download a variety of applications onto the iphone, for a range of tasks.  I was flicking through the applications yesterday and came across something very interesting. 

The application is called “dynolicious.”  Supposedly, it calculates a car’s max bhp, Gs, max power and torque, 0-60 times, 70-100, 0-100 etc, and also gives a graph for max torque/bhp - basically the same kind of values that you’d get from a rolling road.  So, i thought, another waste of money wannabe application that doesn’t do what it says on the tin - so i downloaded it :nerd:!

Here comes the mk5 stuff!  I tried this today in my car to see what’s what.  Apparently it uses the accelerometer function on the iphone to do all its calculations.  So stopped at the traffic lights to a long road merging on to the motorway.  Calibrated the software.  Lights went green, started the software and gave the car the full beans.  Worked through the gears on the dsg, flicking the paddles to 70mph.  Came off the motorway, stopped on the side of the road and read the results as follows (baring in mind this software has no car database, so it has no idea about my car):

0-20 mph --> 2.33s

0-40mph --> 4.6s

0-60mph --> 6.0s

Max power --> 230bhp

1/4 mile run --> 13.68s

Still trying to figure out how to get peak torque figures, but what do you guys think?  I was very impressed by the figures as they seem pretty accurate and similar to the kind of figures some of you have produced on 1/4 mile runs and rolling roads.  I will try it again over the next few days, but as it stands it seems i’ve just spent £7.49 for a pretty accurate rolling road test :laugh:!
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Offline SteveP

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Re: Rolling road test - on iPhone!
« Reply #1 on: 01 August 2008, 06:31 »
I have read a thing fews about this app and it sounds pretty good, the only thing I would be a little skeptical about in the power graph function as I don't see it how this could be calculated from the accelerometer and GPS data.

But the timing and the G-force stuff should be pretty spot on.



Offline 182_blue

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Re: Rolling road test - on iPhone!
« Reply #2 on: 01 August 2008, 06:43 »
apparently it doesn't use GPS data as it works on the ipod touch too, so i would say its fairly inaccurate if any of the other other movement realted stuff are anything to go by

Offline 2007GTI

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Re: Rolling road test - on iPhone!
« Reply #3 on: 01 August 2008, 08:04 »
you have been had mate, if you read the reviews on the App Store people are slagging it off saying you can't calibrate and its totally inaccurate.

The iPhone's accelerometer is not accurate enough to produce such figures, so this software really is just a toy.

 :nerd:
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Offline SteveP

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Re: Rolling road test - on iPhone!
« Reply #4 on: 01 August 2008, 08:16 »
Thanks for the info guys, I known someone who was about to buy it thinking it used the GPS.

Offline topher

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Re: Rolling road test - on iPhone!
« Reply #5 on: 01 August 2008, 08:34 »
Would hardly be a waste of money at £7.50, those g-tech meters are far more than that and work on the same principle. I would imagine you need to input the cars weight somewhere to get a power figure. But as said above, they're more of an indication than an accurate reading.. so very good for benchmarking your own car against future modifications :afro:

Offline Greenouse

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Re: Rolling road test - on iPhone!
« Reply #6 on: 01 August 2008, 09:07 »
If you know anyone who has a re-mapped ED30 it would be interesting to compare the figures to see if they stack up in the real world? Sounds a pretty neat toy though, and for £7.50 who can argue  :wink: Hours of fun........

Offline Vtec Abuser

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Re: Rolling road test - on iPhone!
« Reply #7 on: 01 August 2008, 09:53 »
Sounds just like the G-Tech meter that is available. They aren't a million miles away from being accurate, but don't take into account road conditions, slight hill in the road will make figures totally worthless IMO. Or anyone could just find the nearest hill and get a cracking time..  :grin: Not bad for £7.50 though..
Also, you aint going to get a 13.6 1/4 mile with 230bhp/Standard Ed30 mate i'm afraid..

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Offline topher

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Re: Rolling road test - on iPhone!
« Reply #8 on: 01 August 2008, 09:56 »
Also, you aint going to get a 13.6 1/4 mile with 230bhp/Standard Ed30 mate i'm afraid..

Especially when he didn't go above 70mph :grin: On a flat enough road I found my gtech was at the most a couple of tenths out.. haven't used it in my mk5 yet though.

Offline joesgti

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Re: Rolling road test - on iPhone!
« Reply #9 on: 01 August 2008, 09:57 »
sounds decent but as troph said 70mph and a 13.6 sec 1/4  :huh: :huh:


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