[Diy_efi] [off topic] performance meter app

[Carter Shore]

Since you are already capturing the data, and have a platform capapable of doing the calculations:
Capture coast-down, and calculate the HP vs speed.
Then calculate the aero Cd by subtracting out the extrapolations of mechanical drag.
For 'dyno' feature, allow user to enter?correction data?like air temp, baro, relative humidity, etc.
Could the camera phone take a high contrast frontal pic of the car, then do an estimate of the frontal area based on user input of measurements of some distinct linear dimension (ground to bottom of the door handle, etc.).
?
Carter

--- On Mon, 11/7/11, Jonathan Bell <jonnbell at gmail.com> wrote:


From: Jonathan Bell <jonnbell at gmail.com>
Subject: Re: [Diy_efi] [off topic] performance meter app
To: "Ben P" <benof1987 at hotmail.com>
Cc: "<diy_efi at diy-efi.org>" <diy_efi at diy-efi.org>
Date: Monday, November 7, 2011, 1:17 PM




Keep us posted! ?That looks great.?



Jonathan?

On Nov 7, 2011, at 10:58 AM, Ben P <benof1987 at hotmail.com> wrote:







I'm considering writing a performance meter app for my android phone. It's about getting the features I want and proving I can more than anything else. So these are the features I want to implement :

Vector based (no need for specific phone orientation, just constant throughout run)

Graph output with selectable axis (i.e. Speed or time for y axis)

Save/export function

Additional calculations based on accelerometer data and user inputs (dyno plot, maximum possible g-circle, etc)

"live" g-circle display

User selectable time splits on both previously recorded and about to be recorded acceleration runs

Is there anything else you would like to see?

I don't intend to charge for distribution of this app if I do get it finished, although a donate version (possibly with skins or somethingelse)


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