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-   -   Measuring camber at home with the iPhone (http://www.bimmerfest.com/forums/showthread.php?t=325556)

KrisL 11-12-2008 07:49 AM

Measuring camber at home with the iPhone
 
Shortly after buying an Apple iPhone, I found an application called Clinometer - it's a level and slope finder available from the iTunes Store for a reasonable 99 cents. It uses the phone's built-in accelerometers to measure angle with amazing accuracy. Useful for hanging pictures on your wall, making sure your new plasma TV isn't crooked, and most importantly, making sure you are getting the most out of your tires while autocrossing and on the track.

Step 1 was to find a straight block of wood that is cut to touch the top and bottom lip of the wheel:


Step 2 is to put this block of wood on the garage floor and go through the simple calibration procedure in the application. I could calibrate it from multiple directions in order to measure my camber relative to gravity.. but since the car in on the ground, I want to measure it relative to the garage floor only.


Finally, I can place it against the block of wood pressed against my wheel:


MMME30W 11-12-2008 08:40 AM

:wow:

That is just so cool! :D

SeanC 11-12-2008 08:45 AM

cool! I have been shopping around for a nokia e90, but I might as well get the Iphone because of all the cool features it has (and the accelerometers, too)!

v33_n0d3 11-12-2008 10:19 AM

That is awesome. Very remarkable.

gesoffen 11-12-2008 10:49 AM

Add the Dynolicous software to the iPhone too. Although a bit more expensive ($10 IIRC), its pretty impressive as well. The simple comparisons that I've seen have shown the iPhone with Dynolicious to be better than the G-Tech unit and it compares within a couple of percent to actual dyno numbers and drag time slips.

david @ eas 11-12-2008 11:06 AM

That is awesome... Really smart of you to think to do that. Nice job :)

BDWREDZ 11-12-2008 08:20 PM

That's an interesting idea. For those with windows mobile phones....http://www.freewarepocketpc.net/ppc-...bblelevel.html. Not as fancy, but same idea.

SocalZHP 11-12-2008 11:28 PM

Yes!! I just bought the app. Thanks Kris:thumbup:

Fast Bob 11-13-2008 06:29 AM

Wow ! That`s quite impressive....and a bargain too....thanks for sharing !

smolck 11-13-2008 01:41 PM

Ok, I have seen it all now.

Maybe they have a 1/4 mile time app too? Skidpad G force app?

Fast Bob 11-13-2008 01:44 PM

Quote:

Originally Posted by smolck (Post 3700208)
Ok, I have seen it all now.

Maybe they have a 1/4 mile time app too? Skidpad G force app?

Ask and you shall receive....see gesoffen`s post #5 above....

smolck 11-13-2008 01:46 PM

Quote:

Originally Posted by Fast Bob (Post 3700214)
Ask and you shall receive....see gesoffen`s post #5 above....

Sorry, I'm a skimmer......

Now I just need an iPhone that will put a manual in my car for me.....

brosher 11-13-2008 01:55 PM

Very cool.

KrisL 11-13-2008 02:33 PM

Quote:

Originally Posted by smolck (Post 3700217)
Sorry, I'm a skimmer......

Now I just need an iPhone that will put a manual in my car for me.....

You can copy the pdf manual to the iphone and browse it from there no problem.

Oh wait, you meant manual transmission :).

gordo325xiwagon 11-13-2008 03:28 PM

Thats really neat Kris. It sure beats my old "analog" geometry by a long shot. gordo

http://gordonrichards.net/300zx/front.camber.test.jpg

http://gordonrichards.net/300zx/fron...er.measure.jpg

Solidjake 11-13-2008 03:32 PM

wow, that is a very neat application. too bad i dont have an iphone

KrisL 11-13-2008 03:42 PM

Quote:

Originally Posted by gordo325xiwagon (Post 3700406)
Thats really neat Kris. It sure beats my old "analog" geometry by a long shot. gordo



haha! That's how I used to measure it too (obviously the deflection of the lower sidewall would cause the measurements in these pictures to be a bit off):


http://farm4.static.flickr.com/3221/...55d554a57f.jpg

http://farm4.static.flickr.com/3236/...7f512d51b4.jpg

http://farm4.static.flickr.com/3032/...63be7a86f6.jpg

Tangent(A) = opposite / adjacent

and my little cheater table:
opposite/adjacent equals camber
0.004 -0.25
0.009 -0.50
0.013 -0.75
0.017 -1.00
0.022 -1.25
0.026 -1.50
0.030 -1.75
0.035 -2.00
0.039 -2.25
0.044 -2.50
0.048 -2.75
0.052 -3.00
0.057 -3.25
0.061 -3.50

Melquin 11-13-2008 03:48 PM

Quote:

Originally Posted by KrisL (Post 3700438)
haha! That's how I used to measure it too (obviously the deflection of the lower sidewall would cause the measurements in these pictures to be a bit off):




http://farm4.static.flickr.com/3236/...7f512d51b4.jpg



Tangent(A) = opposite / adjacent

and my little cheater table:
opposite/adjacent equals camber
0.004 -0.25
0.009 -0.50
0.013 -0.75
0.017 -1.00
0.022 -1.25
0.026 -1.50
0.030 -1.75
0.035 -2.00
0.039 -2.25
0.044 -2.50
0.048 -2.75
0.052 -3.00
0.057 -3.25
0.061 -3.50

He he. Now I've got something new to throw in my niece's face when she starts with, "When am I ever going to use this stuff." while I'm tutoring her in trig.:)

smolck 11-13-2008 05:38 PM

"iNerd":

A person who embraces iPhone and iPod so much it begins to rule their lives
"Hey, I think Joe has become a bit of an iNerd since he bought that iPhone"

Insert "Kris" where you see "Joe" above.....

smolck 11-13-2008 05:41 PM

I think this guy said it best....

The answer is, of course, an emphatic Hell No! But it might be too late. I'll get the iPhone because it is a great device and I want one, but I have a few points that I will hold my ground on:

* I won't wait in one of those damn lines at the Apple store to get it
* I won't pull it out at every possible opportunity to show it off
* I won't talk about it incessantly and argue its merits at dinner with people I don't know that well
* I won't buy over-priced Apple products just because they are made by Apple
* I won't wait with baited breath for Steve Jobs to tell me about the next great Apple innovation
* I won't read the MacRumors blog to find out about what is coming
* And most importantly, I won't become an iNerd

Yeah, I'm gonna stand my ground.

Posted by: Connor Fee

wdgiles 11-13-2008 06:40 PM

ok, I'll admit I just bought two 16's, one for me and one for my wife. I'm no Apple fanboy even though (or maybe because) I used to repair them professionally. These days I just use Linux (Fedora) for everything at home. Seems like every day I find some new use for it and I haven't regretted picking it up at all. Now if only they'd make the right cable so I can charge it while I listen on my dice adapter.

KrisL 11-13-2008 06:46 PM

Quote:

Originally Posted by wdgiles (Post 3700739)
ok, I'll admit I just bought two 16's, one for me and one for my wife. I'm no Apple fanboy even though (or maybe because) I used to repair them professionally. These days I just use Linux (Fedora) for everything at home. Seems like every day I find some new use for it and I haven't regretted picking it up at all. Now if only they'd make the right cable so I can charge it while I listen on my dice adapter.

http://home.swipnet.se/ridax/connector.htm?connipod.htm

That's what I use with my intravee, works great.

AndrewZ 11-13-2008 07:12 PM

I hope this gets added to the wiki. Excellent finding Kris!:thumbup:

KrisL 11-13-2008 07:22 PM

Quote:

Originally Posted by LuvThatSam (Post 3700813)
I hope this gets added to the wiki.

Nah, it's not really E46 specific.

tturedraider 11-13-2008 09:49 PM

This is getting kinda scary! :eeps:


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