Non-Linear Throttle possible fix?

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Reddog88

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This is far from a new topic with GT7, I’ve searched quite a bit for more info and possible fix’s with no luck. If there is something I’ve missed please point me in the right way.
Since I’ve found nothing, and it drives me nuts having 2” travel in the pedal and only able to use maybe 3/4” for nearly the entire throttle band, I thought I would tackle making a custom response curve for my pedal set to offset the strikingly bad progressive curve in GT7. The results are very nice after just a couple hours of tweaking.
I recently upgraded to the Logitech RS Pedals and using the G-Hub software on my PC, I made a custom curve where all the inputs actually match (or darn close, just needs a little more fine tuning).
I’ve gotta say it takes a little getting used to after years of driving with standard in game curve, but if anybody is interested in the data points for it, let me know and I’ll find a way to post them once I get it dialed in just a little more. Of course you’ll need a pc and pedal software that allows custom response curves to try it out. .
 
Reddog88
This is far from a new topic with GT7, I’ve searched quite a bit for more info and possible fix’s with no luck. If there is something I’ve missed please point me in the right way.
Since I’ve found nothing, and it drives me nuts having 2” travel in the pedal and only able to use maybe 3/4” for nearly the entire throttle band, I thought I would tackle making a custom response curve for my pedal set to offset the strikingly bad progressive curve in GT7. The results are very nice after just a couple hours of tweaking.
I recently upgraded to the Logitech RS Pedals and using the G-Hub software on my PC, I made a custom curve where all the inputs actually match (or darn close, just needs a little more fine tuning).
I’ve gotta say it takes a little getting used to after years of driving with standard in game curve, but if anybody is interested in the data points for it, let me know and I’ll find a way to post them once I get it dialed in just a little more. Of course you’ll need a pc and pedal software that allows custom response curves to try it out. .
Click to expand...
I’m very interested. I even had an ai agent try to make a curve for me. I have the Logitech pro pedals. Maybe @LOGI_Rich has some thoughts. He has said before the default should linear.
 
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So I asked Grok to make a curve for me. This is what it came up with. Gonna test later tonight.
IMG_2642.webp
 
I’ve also been looking into the throttle curve for gt7 and found a post on fb where an engineer said race car and indeed road car throttle curves are never linear. He posted a curve that I replicated in Ghub and have so far had very good results with. His was the red curve and you see how I’ve replicated as best I could.
 

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DarkStarr2030
I’ve also been looking into the throttle curve for gt7 and found a post on fb where an engineer said race car and indeed road car throttle curves are never linear. He posted a curve that I replicated in Ghub and have so far had very good results with. His was the red curve and you see how I’ve replicated as best I could.
Click to expand...
Did they say it’s one curve for race cars and another for road cars?
 
Now I can’t find the fb post to confirm😡 but sure he said both and I took it to also mean modest everyday cars.

Whenever I change my hardware I take a stock NSX 02 around Nords to compare times and I’ve taken 1.4 seconds off my previous best using that curve.

I see the theory in this curve as slightly less throttle initially to help prevent wheel spin but after the first point it ramps up giving more power than a straight line and it feels like riding a wave as it’s even improved my drifting. I’m having so much fun feathering supercar throttles on sports tyres.
 
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There's more to it than just the pedal map, see this video by Niels Heusinkveld for example:
GT7 is firmly in the linear throttle category so no matter what you do to the pedal response, it'll never be right.
 
Weird af! Playing with my thrustmaster t598 for about 1 month now and everything worked fine till 2 day ago.. where my gas pedal started to feel off. Noticed pretty fast that when i press 50% only 25% is applied, at 75% its 50% but when i go 100% it is 100%.. so i went to the calibration but everything works fine there. The base recognize the right amount i press.. even when i go to the settings for wheel calibration in gt7, its right,25%=25%,50%=50%... but when i start playing in whichever mode or car the problem is there. I have no idea how thats even possible when its right in the options. i tried it on PC and in the f1 game on ps5 and its right.. the fact that in the gt7 options it is right but ingame on track not just breaks me
 
I'm also interested in fine-tuning the response of my RS throttle pedal, but first I need to understand how the game implements the throttle response when using wheel&pedals.

I've read this thread and looked for more info in other GTP threads but, honestly, I didn't find common ground position on whether GT7 built-in throttle response is either linear or progressive (some say GT Sport used to be progressive but GT7 is linear? - I can't tell the difference as I haven't played GT Sport). Others in the RS50 settings and tips thread claim GT7 built-in throttle response is more like a 'low' sensitivity curve instead of a linear one.

So, for guys who have been on a wheel & pedals setup for longer and possibly played other Gran Turismo installments, what is the most widely accepted position regarding throttle built-in response in GT?
 
I did a bunch of homework on this with ai and this was my conclusion:

GT7’s throttle IS linear (pedal % = torque request %), unlike GT Sport which had a progressive curve.
However, what feels “non-linear” is how each car responds to that torque request:
Why different cars feel different:
∙ Engine torque curves - Turbo engines feel “dead” until boost hits (~4000 RPM), then violent. NA engines feel progressive throughout the rev range.
∙ Gear ratios - 2nd gear feels touchy (high torque multiplication), 6th gear feels smooth (low multiplication). Same throttle %, completely different response.
∙ Tire load sensitivity - 60% throttle with light rear tires (mid-corner) = wheelspin. Same 60% with loaded rear tires (track-out) = clean acceleration.
∙ Weight transfer - Aggressive throttle shifts weight to rear → more rear grip but front lifts → can’t hold steering angle yet.
This is why you can’t “fix it” with static pedal curves - a curve that helps in one situation (6th gear, high-speed) hurts in another (2nd gear, hairpin exit). The “non-linearity” changes dynamically based on gear, RPM, corner angle, and tire load.
What top drivers do: Learn each car’s power delivery and adapt their throttle application per situation rather than using curves. Example: Turbo cars need progressive application (40%→60%→100%) to manage boost onset. NA cars can take more aggressive application.
TL;DR: GT7’s throttle input is linear, but car physics aren’t. Custom curves can’t account for changing grip/torque/load conditions.
 

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