@spaco
any idea on how a ignition timing adjuster could be build for the older distributer type v8 engines ?
Would love to build something useful
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just my 2 cents on the subject…a distributor is dumb for communication …on coalition to timing is location for the plug wires and position it is anchored at…The newer distributor less engines have a crankshaft position ring and sensor…yes some distributors have an advancement plate…that is mechanical…still is in reference of plug wires and mounting position…to do it properly you will need monitor the position of the crankshaft to correctly fire the distributor… I am researching on weather to add a distributor to my coil pack engine to control timing…which will probably disable my fuel injection…and transmission control…or work at making my crankshaft position sensor able to rotate .
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My mixer is built just as your describing. Old honda civic throttle bodies (simple dc motor, spring return. Driving them with PWM through LM298N)
LM298N would not my first choice simply due to the current draw limit (at least with the TBs i am using and because I am using both channels on the LM298N controlling two seperate TBs.)
But i had them on hand so thats what i went with.
Originally i didnt think about the auto mixing functionality, i simply wanted to get away from running four control cables into the cab and concerning myself with the bend radius of the cable. (That being said there is deffinatly something to be said for good old manual control)
But because i did it the way i did, it will be really simple for me to add the auto mix capability. I just need to incorporate a wide band O2 sensor into my system and update my code.
I used an lcd display i had laying around to display what percentage my valves where at. I realize now that wasnt the best choice. Worked fine during the summer but doesnt work so well in the cold. Ill have to switch it out with something that works better for this climate.
The fan i incorporate into the housing drasticly helped dissipate heat created my the motor drivers.
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I suggest you go here and spend some time getting familiar with their methods:
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There is a YouTube Chanel called project binki and in there last video they printed a circuit onto a board with a modified printer
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