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The Something Awful Forums > Discussion > Automotive Insanity > Cycle Asylum > Almost as much HP as a lawnmower: 50cc roadracing
 
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Sagebrush
Feb 26, 2012

Rev. Dr. Moses P. Lester posted:

Yeah but is the rod strong enough? Piston strong enough? Needle bearings strong enough? How do I even know, without running it until it blows up? I'm not at RedBull Racing levels of financing such that I'm comfortable using that method. Maybe I should try calling TAG Heuer and Santander and see what kind of cash I can get, though.

I worked up the Arduino code today for the thing. Been a long time since I wrote any code and never used an Arduino before. Wondering if it's inefficiently written enough that it'll cause processing speed problems at 12000rpm. Or whatever else might be wrong with it. Won't be able to find out until the top end comes back from the machinist and the frame comes back from the bodywork guy.

http://pastebin.com/iiVKc4ps

The two things that stand out to me are that you can save a couple of milliseconds by doing direct port manipulation instead of digitalWrite(), and that I think you could get rid of the if statement inside your interrupt handler with some other code structure since the vast majority of the time it's going to be skipped anyway.

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The Something Awful Forums > Discussion > Automotive Insanity > Cycle Asylum > Almost as much HP as a lawnmower: 50cc roadracing