Fly by wire throttle conversion 3 x 45's??? Anyone?

[Turnpin]

We are currently building a 1967 Aston Martin DB6 to compete in La Carrera Pan Americana and we have some issues with throttle control and want to convert the system to a fly by wire affair. The pedal actuation side is reasonably straightforward but because we are essentially using carburettors we need a 12 V actuator to open them. We are using 3 x Jenvy Heritage throttle bodies, essentially DCOE's, and an Emerald ECU.

Before we start buggering about has anyone done this before? If not any idea who might do a kit?

Not sure if I'm going to get any responses here but thought I would give it a go

Thanks

[stevieturbo]

Would probably be easiest to start with a set of BMW throttles that are already DBW.

I've seen people cut up DBW units to create an actuator for mechanical ITB's, but they seem difficult to get right.

[psi310398]

Why not ask Dave Walker at Emerald M3D? He’s seen everything!

[stevieturbo]

https://www.efihardware.com/products/3236/dbw-actu...

https://www.atpower.com/products/drive-by-wire-act...

[anonymous-user]

BMW have an off the shelf throttle actuator that is used for precisely this purpose on the N/A M cars (E46/ E63 etc). It's basically a geared motor and potentiometer with a lever arm connected that can be used to actuate conventional throttle plates. You should put a second pot on the actual throttle spindle and do an plausability error check between the readings. Most decent aftermarket ECUs should include an suitable H bridge output to drive this sort of motor.

[TekoTime]

Jenvey make their own throttle actuator for use with ITBs. I assume a linkage could be adapted to fit your throttle bodies.

https://store.jenvey.co.uk/electronic-actuator-eta...

[poppopbangbang]

Max_Torque said:

BMW have an off the shelf throttle actuator that is used for precisely this purpose on the N/A M cars (E46/ E63 etc). It's basically a geared motor and potentiometer with a lever arm connected that can be used to actuate conventional throttle plates. You should put a second pot on the actual throttle spindle and do an plausability error check between the readings. Most decent aftermarket ECUs should include an suitable H bridge output to drive this sort of motor.

This, all day long. The Pierburg/BMW M3 motor is used in many motorsport applications because it's bomb proof, extremely powerful and packages easily. There are many other options, but few that have passed OEM durability etc. and it's very cheap compared to doing a custom gearbox on the end of a Maxon or similar.

Note this motor is big and was originally designed to drive 6 butterflies with very stiff return springs, so to run it in anger a H-Bridge arrangement that can support 8 amps+ is required - this is not something that you'll get with an Emerald or most Motec ECUs which are designed to run conventional single throttle DBW bodies - Pectel and Life/Syvecs will run it on the internal drivers though. Alternatively you can run a stand alone H-Bridge/Throttle controller. KMS and Shiftec both make configurable H-Bridge drivers for this sort of application that will supply a standard 0-5V output for throttle position that the ECU can make use of as well as having proper fail safes and plausibility on pedal and throttles and support for blip/ALS throttle jack etc.