MoTeC Global Forum

Hey all,

I bought a Porsche Boxster race car 2 years ago w/ a C127 and a V2 Camera in it. I have slowly learned Motec programming as I have needed to make adjustments and changes but have a long way to go. Anyhow to my question.

The C127 I have receives input from the stock Bosch throttle position sensor, I assume via CAN.
The V2 camera I have shows 94% throttle when the throttle is in fact fully open (have verified it does fully open).
I need help with figuring out how I can read the real time throttle input (appears to be voltage) then recalibrate the C127 as to what voltage represents 100% throttle.

Can I read the Throttle position voltage somehow real-time under Monitor Channels with my laptop connected to see what it shows at WOT?
Then I am thinking I can input this into the Throttle position sensor voltage under Devices > Throttle position sensor to adjust it? Below is what it currently shows for calibration. It looks like currently there are 2 values for 0% and two values for 100% throttle, not sure why that would be.

Can someone point me in the right direction? I wanted to ask here before I start changing things and end up unable to go back to the original LOL.

Thanks in advance.

Most likely the CAN throttle position message represents a throttle angle, not a percentage. We typically correct this using a 2D table. The Input would be the CAN channel, and the output would be another of the "Throttle Position" channels. That output channel is what you would display and log.

If you would post your configuration, someone could fix that for you.

David Ferguson wrote:Most likely the CAN throttle position message represents a throttle angle, not a percentage. We typically correct this using a 2D table. The Input would be the CAN channel, and the output would be another of the "Throttle Position" channels. That output channel is what you would display and log.

If you would post your configuration, someone could fix that for you.

Thanks. Here is my current config. Any help is greatly appreciated! I'd love to learn how to make the changes myself vs having someone do it for me, but the end result is what matters! Any guidance is appreciated as well.

Following up on this, my gas pedal broke and I had to rebuild/replace parts in it. Despite that the throttle appeared to be fully opening before this, fixing the gas pedal brought my display to show 99% at WOT now. So I guess the gas pedal was on it's way out but not obvious enough yet until it actually broke. All good now.