Originally Posted by dohabandit

Throttle position doesn't control fuel delivery, it controls air delivery. In an old carbureted design, it might have had a more direct effect on fuel delivery as the air passes over the venturi and air pressure controls the fuel delivery, along with direct linkages to fuel pumps, etc.
In a fuel injected car, fuel delivery is controlled by a computer that uses a MAF (manifold air flow) sensor to gauge how much air is being delivered to determine how much fuel to deliver (along with a myriad of other factors). That throttle body could be controlled by a direct cable, but typically it is not because of many factors including emissions controls. Some vehicles do it that way though, and they have a throttle position sensor at the throttle body. This is a throttle position sensor vs a pedal position sensor. In a drive by wire, the two are not the same.

The c8 is drive by wire. The soler pedal commander doesn't install at the throttle body, it installs at the pedal. It just tricks the vehicle into believing the pedal is in a different position than it truly is.
I don't see the utility of them unless perhaps you have limited range of motion with your right leg, or you like the feeling that your car is out of control.

Originally Posted by Mark9

Does the ECU/TCU control the opening ramp (0-100%) based on the algorithm in the controller and not just with pedal position?.

Originally Posted by dohabandit

You can accomplish the same by mashing your foot down faster. All this is doing is adding a bit of expo in.
"Psychologically" you think you are getting more power, because you aren't pushing the pedal nearly as much. However, WOT is still WOT....

I'd rather spend my money on WHEEL SPINNERS.

Originally Posted by dohabandit

Totally disagree with this statement, "within reason".

I can go from 0 to full pedal quite rapidly. Yes, you could create an expo map where 10% physical pedal input equates to a commanded WOT and get a faster reaction time, but good luck with your insurance company...and I hope the repairs aren't too costly.
With a reasonable amount of expo, a human can mash the pedal to full WOT just as fast as the pedal quickly gets past the region where the expo was present and into the linear portion of the transfer function.

Originally Posted by Mitchell_B

Not quite…. Remember this was done with the engine not running. There is a breakpoint between closed/no throttle and part throttle. With the engine not running, the throttles are held open a small amount. Once the engine fires and exceeds a minimum engine speed, the ECM transitions from crank mode to running mode and the throttle position is then controlled to give a desired RPM. The drop in the throttle position you see on the graphs is not lag, rather it is the point of transition from idle to part throttle. The graph would look different with the engine running.

Originally Posted by Red Mist Rulz

Everyone acknowledges it doesn't add any actual power at WOT. But how much time do you spend at WOT on the street? 1%, maybe 2%. Throttle controllers make a difference at smaller openings where you spend almost all your time on the street. I, too, believed that you can get the same effect by just pushing the gas pedal down faster. Technically maybe true, but a throttle controller like this really does change how the car feels. A friend who's opinion I value convinced me to try it, and it really does make the car *feel* more sporty and more responsive. It make drivin it more pleasurable. And isn't that the point of driving a sports car?



Again, how often do you drive at WOT? On the street hardly ever, I'll wager. Your argument is a red herring.

Don't you find it telling that virtually everyone who actually tries one loves it, and those who criticize it have never actually tried one?

Originally Posted by dohabandit

You aren't understanding the point. The point is this device is just changing the sensitivity of the pedal. You push it less, you get more, up to a point where it returns to linearity or depending I guess on the program you selected.
You can get the EXACT SAME response with your engine, just pushing your foot down faster and further. Yep, it will make it seem a lot peppier because you are giving it the beans.

Originally Posted by Mike@SolerEngr

Hi Folks. The ECM limits the throttle to 60% while under 3200 rpm, after that it will go to 100%. Nothing to do with the controller. What you see here is the controller superimposed with the ECM for whatever reason it wanted to intervene, the controller performance is the plot on our website.

Thanks,