Recent content by RexRoentgen

To clarify my intentions with this project further. The end goal isn't to bolt on horsepower or add any cool functionality. Its ultimately to learn about engine control and design. So yes I can go and purchase an ecu to do all that I want it to do, but that's gettig away from the point of why I...

I agree that I can go out and purchase all that I am looking for, but that's not what I am interested in doing. I want to make the components and do it myself.

To my knowledge the stock 73 corvette does not have a HEI distributor and it also has a mechanical tach drive. I've converted the system over to an MSD ignition for reasons other than getting an electric tach signal out, but since I have it I'll use it for the project I'm currently working on.

The project I'm working on has larger ambitions but I'm currently focused on implementing a rev matching system in my C3 corvette. It seems like the right combination of all the things I'm interested in. In this thread I sort miss-titled it because I'm not actually looking for a...

While I am using a small block chevy, it is in a 73 vette and its a 68 block. So I am not sure how the ecu would help.

Sooooo is it 1 pulse per rev of the distributor or 8 pulse per rev of the distributor?

Hmmm both suggestions seem reasonable. When I get my hands on the car and the ignition installed Ill hook up a scope to it to actually view the signal. I was hoping to have some code already laid down but i guess Ill just put a scale factor into account for pulses per rev. Ill report back what...

The thing is I am going be reading the signal into an MCU not a tach. Its an 8 cyclinder 4 stroke small block chevy. The 22.5 degrees would then make sense for an 8 cylinder square wave with a 50% duty cycle based on what youre saying.

If that's the case though then how many pulses should I expect per revolution of the crank/distributor?

I'm looking to get some help understanding the tachometer out specifications for an MSD 6AL ignition control unit. It specifies that "The Tach Output wire produces a 12 voltage square wave signal with a 22.5° duty cycle." I'm fine with the fact that its a 12 volt square wave, but I'm a...

Should have done more research before posting my question. I ended up locating a hall effect based sensor thatll fit the bill.

Im currently designing a system to convert my cable pull throttle to an electronic one as part of a bigger project. Initially I was looking at using a potentiometer to indicate how far the acvelrator pedal had been pressed, but am wary of such a system due to the potential wearout. Can someone...