Drive by wire, getting rid of another cable, Electronic pedal, not a wa wa Options

[Gunn1]

Anyone have a drive by wire set up on their 914? Looking for a cable-less solution to throttle control. Would be for a stock 75' 914 2.0liter. (IMG:style_emoticons/default/driving.gif)

[Mike Bellis]

I love my DBW in my 914. I'm running a Motronic 7.5 ECU and it's built in. I don't think I could ever go back to a standard cable.

[Gunn1]

I love my DBW in my 914. I'm running a Motronic 7.5 ECU and it's built in. I don't think I could ever go back to a standard cable.

When you say "I could never go back to a standard cable" what have the Benefits of the DBW been for you. I like that one of them would be a cruise control.

[Mike Bellis]

I love my DBW in my 914. I'm running a Motronic 7.5 ECU and it's built in. I don't think I could ever go back to a standard cable.

When you say "I could never go back to a standard cable" what have the Benefits of the DBW been for you. I like that one of them would be a cruise control.

I like the feel. In the past I had to run the cable loose as the clutch cable would interfere slightly if the throttle cable was too taught. The action and feedback from the DBW is smooth. Cruise control is good too. I can also use my VCDS to calibrate the throttle anytime as well.

The ardino with stepper motor controller would be the only way to do it if your ECU cannot. This seems like a good way to make a custom unit.

My VW/Audi unit works like this:
Throttle pedal had dual potentiometers. One runs at 0-1V DC and the other runs at 0-5V DC. There is a comparator circuit in the ECU that looks at both signals to make sure the percentage of voltage matches. The throttle body has another potentiometer to provide feedback to the ECU and stepper motor leads. If the 2 pedal signal do not match ou will get an error code. If the throttle body does not match, you will get an error code. The code is a "throttle angle not as expected". My VCDS allows me to re-calibrate as needed. If I leave the battery disconnected (usually do) the system will run an auto calibration with the first key on. The battery has to be off for a few days or it will not auto calibrate.

The adrino could use the pedal potentiometer and stepper motor in the TB very easily. The feedback loop may be a little more challenging with coding.

There is the slightest delay from pedal to TB but this in not really noticeable unless you go from 0 to WOT in under a second. Since i do not drive like this, it's not a problem. For me it's just super smooth throttle response.