Hello,
I’m a total newb and I’m sure this project is simple for most of you folks, but I’m interested in installing a fly-by-wire throttle in my 1970 Porsche 911t.
I have recently converted the traditional two Weber carburatores to electronic fuel injection (EFI) using 6 Suzuki GSXR individual throttle bodies (ITB). I am running the ITB’s with a Megasquirt controller. I’m quickly realizing the ball end and rod linkage is less than desirable and thought it would be cool to update the linkage. Again, hang with me, I’m electronically ignorant.
Mission: Control each bank of ITB’s with synchronized servos (one servo per bank) via a potentiometer on the throttle pedal.
Here are the components I’m thinking I’ll need.
Servo (x2) - high temp (250F), 12V (or step down converter), 222 oz-in torque (?need to measure force required to move throttle bodies)
potentiometer - heavy duty, 2 inch stroke
linkage rod with ball ends
Controller to synchronize - ? (potentiometer needs to swing each servo the same amount at the same time)
Is this possible to do without breaking the bank?
Any help pointing me in the right direction is much appreciated.
Hi airfix4,
This is an interesting project but that might have security / safety issues. You have to build a truly bulletproof / robust / fail proof system when dealing with a car throttle.
The best would be to have a linkage between all the ITB and control all that through a single actuator.
R/C servos might have issues because they are not made to be working continuously, they require downtime to cool.
Our Torxis i00600 servo is very strong and works on 12V.
Torxis i00600 12V High Torque Servo Motor
You will need a R/C servo controller or a microcontroller to make it move and program your own application. Many controllers are available.
Arduino & Compatible Category
Arduino Uno USB Microcontroller Rev 3
Here is an Arduino project that does just that, and uses a potentiometer.
Thanks Eric,
I’ll do some more research.
I was looking at that servo. I was hoping to use two servos in order to eliminate the linkage between banks. This is where I came up with the idea. The stock linkage is not friendly to set up.
The servos may not need to be synchronized, but rather “set” to 0 throttle and WOT using single linear potentiometer.
If you send the same PWM signal (what R/C servos use) to both the servos, they will move synchronized.
However, there are chances that one fail for example and you will only have half of your cylinders open. Not sure if that could lead to damage internally.
A Lynxmotion SYA-01 Servo Y Adapter Cable can help sending the same signal.
