[Kosh]

So MT Cars will have
1 Normal
2 track mode
3 Sport mode
4 All off mode

What will be the differences between 2 and 3?

 

[Kosh]

And the GR86s Sport mode is always 100%?

 

[Kosh]

Another way to think of this is that every modern car has a built in Pedal Commander. All new cars use software and sensors to control the way pedal movements translate to fuel flow. So far as I know, no new car has an actual physical link between the pedal and the fuel delivery system.

Understood that way, the issue comes down to preferences. Do you like that pushing the pedal 1/4 of the way through its travel unleashed 2/3rds of max throttle? And that the last inch of pedal travel does literally zero? I don’t (though it’s also not anywhere near my biggest gripe with the car).

I don’t know what options users have with a pedal commander or similar devices. But none of those options are any more “artificial” than the artificial choices that were already made by Subaru and Toyota.

If one of these devices would let you get 1/4 of max throttle from 1/4 or pedal travel, etc, I’d call that an improvement.

No Gas Pedal was ever physically linked to the fuel system.

The gas pedal controls the throttle, that means the air, that is sucked in.
The MAF sensor measures the amount of air and the ECU calculated the gas to maintain a 14/1 rate.

In good old times pedal and throttle were linked by a Bowden cable and now the pedal has a sensor, that measures how far its pressed and senda that to the ECU, which opens the throttle as far as provided by a software map.

This is called throttle mapping.
Most cars, like the BRZ have a linear throttle mapping, the GR86 has a logarithmic one, that means that the throttle is opened wider, than the pedal is pressed...

Actually it's not even a mathematical functions, it's a big map/table of inputs and outputs, like: at 40% pedal and 3000 rpm -> open throttle 43%, and so on (for any combination of pedal way and rpm).

So there can be special values for special combinations, that cannot be modelled mathematically. In my understanding both GEn2 cars have a bigger output at higher rpm, like (according to my example above): at 6000rpm and 40% pedal -> open throttle 70%.

And you can do things like idle mapping, that needed hardware before -> no throttle means engine stall and no pedal input means no throttle, when physically connected.
With software mapping you can do: at 0%pedal and 600rmp -> open throttle 5% (to keep the engine running).

The new button seems like just switching to another map, that has more output at the same input.
The same, that the GR86 has built in.

The question is just: will the normal map of the 2025 GR86 be same as the old BRZs map (Linear), or will it be an overkill?

I sold my GR86 for a BRZ, because of the throttle mapping... Can't imagine to have more direct mapping, that would be a binary gas pedal


Sorry for the bad English, could explain that way better in German

 

[Kosh]

Certain cars and bikes did have pedal input to fueling in the carburetor days, basically as you opened the throttle, the cable linkage would also pump a primer to push fuel through to catch the initial change in throttle opening before the small or large jets would react. With old carb cars, a kid could play pretend driver with the car off, pump the throttle 4 or 5 times and flood your motor to make things fun for the next start up.

the carburetor disagrees

I already understood