Bad gocart carb? Fix it using arduino+injector

3 Comments

1. 

   Sorry for the lengthy explination.

2. 

   Josh harding,
   I went to radio shack and picked up an arduino. Its a programmable micro-controller that is super simple to use and tutorials/ code can be found on the arduino.cc website. I used the potentiometer tutorial. then just tweaked the the timing off and on to 90-120 miliseconds I added a variable so that as the value of the potentiometer went up and the frequency of the engine spark rose the frequency that the injector fired would increase. proportionately. It seams like a lot but once you see the tutorial it will make more sense. I used the arduino to trigger an npn transistor that was hooked up to the injector negative pole and ground of a 9v battery. the positive end of the injector was hooked directly to the positive of that 9v battery. That 9v battery was dedicated directly to firing the injector, not the arduino. A separate 9v battery was used to power the arduino.
   As for mounting the injector, I went to walmart and got bondo glass. I took the float bowl off and aligned the main jet and outport of the injector. Then I used the bondo glass to hold the injector in place and seal all other jets and inports to the carb. after that I hooked up a pressurized spray tank from the dollar general to the inport of the injector. well that was my first version, after that I ungraded to an inline fuel pump I got out of an old bronco on a local scrap yard, same place I got my mazda car injector. Then I hooked up a rectifier to get positive and negative off the alternator/magneto in my case. If you hook it up like that when the motor is turned over the faster it spins the more power it produces which will increase power to the motor which will supply more pressure. 

3. 

   Hey, how did you manage to get this done? I'm looking into doing something similar.