DBW using BMW motors

[msimard]

I'm using 2 electronic throttle actuators from an e46 M3 to control the individual throttles on my Ferrari V12.
If I buy an S8, what will be involved with setting this up?
Can Syvecs supply an ecu that is ready to use? Do I need to learn about things specific to motion control such as proportional gain etc?
Any other thoughts appreciated.

[pavlo]

You will need2 sensors per throttle bank, and a dual sensor pedal. I believe the BMW motor has one sensor in already, meaning you can combine that with exiting TPS sensors.

To wire it in and use it is not hard, to tune the throttle can take a little time for it to be perfect, but it can be set up quickly and easily with a bench test if someone hasn't already tested the M3 motor.

[msimard]

You will need2 sensors per throttle bank, and a dual sensor pedal. I believe the BMW motor has one sensor in already, meaning you can combine that with exiting TPS sensors.

To wire it in and use it is not hard, to tune the throttle can take a little time for it to be perfect, but it can be set up quickly and easily with a bench test if someone hasn't already tested the M3 motor.

Wouldn't the M3 have a TPS with 2 tracks? Others I've seen have and IIRC the second track commonly inverts the resistance direction on the second track. Do the 2 sensors need similar characteristics?

[pavlo]

I am pretty sure the M3 uses one single track sensor on the motor, and a single track sensor on the throttle itself.

Normally the two sensors are either inverted, or have a slightly different resistance or voltage range, so that if they both fail they go to a different voltage and the ECU knows something is wrong. If they are normal carbon track units (almost all OEM is) then it's easy to wire them reversed, and dual output Hall sensors like the Penny & Giles unit have inverted outputs by default.

[msimard]

I am pretty sure the M3 uses one single track sensor on the motor, and a single track sensor on the throttle itself.

OK, that makes sense in that BMW can monitor linkage problems in between the 2 sensors.

So it sounds like I'm on my own with the motors.

[pavlo]

Did I say you were on your own with the motors?

It wouldn't be hard to send the motor in for characterisation, but it may have already been done.

[pavlo]

Honestly the best thing you can do is get someone to work with you with getting initial setup so you have something to do the wiring to, and then get them to come and sort out the initial startup and get it running even if you want to go on and do the calibration yourself.

[msimard]

Did I say you were on your own with the motors?

It wouldn't be hard to send the motor in for characterisation, but it may have already been done.

I mean "on my own" in that Syvecs hasn't chimed in to report that they already have worked with these specific motors and already know how to set them up, so I assume I'll have to do some bench testing.
I'm in the US and don't have anyone local that I can bring in so I'd have to rely on phone/email help with someone like you. Syvecs hasn't returned a call I made and I feel like they are not available to me.
Part of the reason for my posting was to see what kind of attention this gets and alleviate my concerns about buying an ECU and being the only guy within a thousand miles to have one.

[pavlo]

Have you spoken to Syvecs US?

It would be easy enough to provide you with a DBW config that will work 95% of perfect, and probably better than many ECUs can ever manage. so I wouldn't let the DBW setup put you off.

[msimard]

Have you spoken to Syvecs US?

It would be easy enough to provide you with a DBW config that will work 95% of perfect, and probably better than many ECUs can ever manage. so I wouldn't let the DBW setup put you off.

Yes, Syvecs US is always available when I call and helpful. I haven't asked them about this question yet.
My concern with the motors is the electrical control settings related to motion control, the throttle control strategies would be the fun part.