Fuel injection

Douglas Binder /
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It started!!!

Let's back up. As some of you know, I've been building a land speed racing Puch Maxi. After the last event in September, I decided to start making big changes to the bike. In particular, I wanted to cast my own cylinders and also add fuel injection. See my other thread about the cylinders but this is about the EFI. I wanted EFI for a few reasons: control over the fuel mixture, control over the ignition, and the ability to run a large throttle body without having mixture issues like you would with an overly large carburetor. It is powered by a total loss battery. Remember that I only need to go wide open for 1.5 miles then get back to the pits.

I started by buying a kit from China. It included a throttle body, fuel pump with regulator, and injector. I was frustrated by the lack of good documentation but, fortunately, I discovered Speeduino, an open source EFI project based on an Arduino Mega2560. I bought an NO2C board and have been working on it the last few weeks. For crank angle, I machined a 24 tooth wheel and use an optical interrupter to detect the holes. I also decided that I wanted two injectors because I didn't feel that one injector could handle the range of rpms that I hope for.

For monitoring and tuning, I used a Raspberry Pi with a 7" monitor running Tuner Studio. This will be mounted in front of the handlebars eventually but now it sits on a stool by the dyno.

This single post is part of a larger thread. Start from the top or view this post in context.
Subject Written By Posted
  Fuel injectionTopic by: Douglas Binder Douglas Binder 04/07/19 05:01PM
  Re: Fuel injectionRe: Douglas Binder Douglas Binder 04/07/19 05:03PM
  Re: Fuel injectionRe: Douglas Binder Douglas Binder 04/07/19 05:04PM
  Re: Fuel injectionRe: Douglas Binder Douglas Binder 04/07/19 05:04PM
  Re: Fuel injectionRe: Douglas Binder Douglas Binder 04/07/19 05:06PM
  Re: Fuel injectionRe: Thomas TPRF Thomas TPRF 04/07/19 06:07PM
  Re: Fuel injectionRe: Mike Boyd Mike Boyd 04/07/19 06:41PM
  Re: Fuel injectionRe: Ľ̷̝̽͒i̶̛̼͑͠ȁ̸̧̛̽m̵̻̟̯̀̅ ̷͎̙̽̊F̶̲̺͑̓ F Ľ̷̝̽͒i̶̛̼͑͠ȁ̸̧̛̽m̵̻̟̯̀̅ ̷͎̙̽̊F̶̲̺͑̓ F 04/07/19 09:25PM
  Re: Fuel injectionRe: Graham Motzing Graham Motzing 04/08/19 09:36AM
  Re: Fuel injectionRe: Douglas Binder Douglas Binder 04/08/19 09:49AM
  Re: Fuel injectionRe: Graham Motzing Graham Motzing 04/08/19 11:20AM
  Re: Fuel injectionRe: Totally normal JBOT Totally normal JBOT 04/08/19 11:40AM
  Re: Fuel injectionRe: Alex hernandez Alex hernandez 04/08/19 05:39PM
  Re: Fuel injectionRe: Josiah Radebaugh Josiah Radebaugh 04/08/19 07:42PM
  Re: Fuel injectionRe: Derek Stahl Derek Stahl 04/09/19 11:09AM
  Re: Fuel injectionRe: Thomas TPRF Thomas TPRF 04/09/19 11:40AM
  Re: Fuel injectionRe: Douglas Binder Douglas Binder 04/09/19 01:12PM
  Re: Fuel injectionRe: Thomas TPRF Thomas TPRF 04/10/19 10:09AM
  Re: Fuel injectionRe: Matt Mahloch -- MBM Customs Matt Mahloch -- MBM Customs 04/09/19 07:18PM
  Re: Fuel injectionRe: Douglas Binder Douglas Binder 04/09/19 08:32PM
  Re: Fuel injectionRe: Douglas Binder Douglas Binder 04/10/19 10:40AM
  Re: Fuel injectionRe: * * * * 04/10/19 10:59PM
  Re: Fuel injectionRe: Douglas Binder Douglas Binder 04/11/19 09:50AM
  Re: Fuel injectionRe: * * * * 04/11/19 10:12PM

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