555 Timer for fuel control with a MPX4250AP

Discussion in 'The Projects Forum' started by sp00nix, May 2, 2011.

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  1. sp00nix

    Thread Starter New Member

    Apr 10, 2010
    Hello, apparently i signed up here about a year ago and forgot :)

    Any way here is the background of my little project here.

    I have a car that uses mechanical fuel injection and i plan on adding a turbo charger. The main bottle neck with the current system is fuel delivery. What i need to do is add a standard electronic fuel injector to the intake manifold that can put more fuel in when needed. I have seen people do similar with a basic pressure switch, but its either on or off. I want to use a Motorola MPX4250AP to measure the manifold pressure and feed the signal to a 555 or similar IC to control the frequency to the fuel injector. Also, a pot is desired to control the duty cycle so it can be tuned in using my air/fuel mixture gauge. As for driving the fuel injector, i have that covered. I have never worked with a 555 and i think this would be a simple little project.

    If anyone else has any other ideas, please feel free to chime in. I also have a Launchpad and an Arduiono.

  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    And U forgot to read the rules too.
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    Current Terms of Service:

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