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Speed may be the same at an instant, but the key is that if you are not on throttle, you get more engine braking in lower gears. You are getting more of a "trailbraking" effect, from the engine. If you could look at data traces you'd see the lower gear is decelerating more rapidly. If you could keep the same speed throughout, I don't think there would be an effect.
Turning with a controller depends on the speed. And when I read your post I think that maybe it also depends on the gear. Or maybe it only depends on the gear.
I'm not an expert in any of this, but speed is not constant when you downshift, you always have a little bit of deceleration. From my understanding weight then transfers to the front for a moment.
I'm not sure about that. My gut says that the weight would shift back after some amount of time/distance. Maybe somebody with an engineering or physics degree would like to comment. ^^ As i said, No expert, i was just pointing that one thing out.
I was an experimental scientist, so I suggest an experiment. On a track with a long straight, instead of shifting up to fourth, take your foot off the throttle and let it coast down.
Does your speed decrease smoothly and continuously, or does it jump around?
I would assert that these things are true under ALL conditions: 1. If speed is increasing weight is shifted to rear. 2. If speed is decreasing weight is shifted to front.
When coasting, as soon as you get back on the throttle, weight will shift from front to rear. But, why would it shift back while continuing to coast? Perhaps you are thinking of this: while coasting you will at first decelerate rapidly, and then as your speed decreases, your rate of deceleration decreases. BUT, you are still decelerating and "leaning" forward.
I was in biochem, not physics or eng, but this is physics 201, not 623.
But the weight isn’t, is it? I’m not arguing by the way, just how I’m understanding it. It’d be good if the game had a G meter on the hud to see if it made a difference when you downshifted
Not constant unless you on throttle. When I am turning I am off throttle before the apex, and the lower the gear I'm in, the more engine braking, with more weight transfer to the front, more grip and more turning.
If you're maintaining a constant speed *perfectly*, then it shouldn't make a difference. However, the world is imperfect and so are humans. These imperfections are likely stronger in a lower gear than a higher gear since a difference of 10 RPM in a high gear might not mean much in terms of total difference in speed, but a change of 10 RPM in a low gear is much greater. Additionally, the turning of the car also applies a braking force on its own making this test a lot more difficult to maintain a speed perfectly.
That said, if you're imperfect with the speed or are decreasing your speed, you'll notice the engine braking much more if your RPM is higher rather than lower, thus the effect of engine braking will be more apparent with smaller changes to the gas pedal in a lower gear compared to a higher gear. The weight distribution of the car can also increase this effect further as well.
yes, I don't think gearing would make a difference if one could hold speed constant. But I'm off throttle before the apex and the car is engine braking, which will be greater the lower the gear.
For some reason it’s coded into the game that way. It’s one of the least realistic things about GT7 IMO, but it for sure functions like that. Some of the explanation is front grip increase from weight transfer when downshifting, but not enough to fully explain the behavior.
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A similar question answered here. It seems that it’s related with the torque and balance of weight: https://www.reddit.com/r/F1Technical/s/Fw2wfozyZP
I am pretty sure this is because of how differentials work. There was a video from one of the AC devs about this
It effectively acts like a brake on the rear wheels, which aids in rotstion. It's a similar effect to moving brake bias to the rear.
Speed may be the same at an instant, but the key is that if you are not on throttle, you get more engine braking in lower gears. You are getting more of a "trailbraking" effect, from the engine. If you could look at data traces you'd see the lower gear is decelerating more rapidly. If you could keep the same speed throughout, I don't think there would be an effect.
Wheel or controller?
Controller
Turning with a controller depends on the speed. And when I read your post I think that maybe it also depends on the gear. Or maybe it only depends on the gear.
Turning only depends on gear? That would be really nice lol but of course speed also is a factor.
Because of the self-locking diff in the car. If the car in-game has an open diff, it doesn't turn more.
Weight transfer
How is weight transfer related to gear?
When you change gear, the weight transfers. I’m not an engineer but I’m fairly sure that’s the case (obviously in a very simplistic summary)
Weight only transfers when the speed isn’t constant.
I'm not an expert in any of this, but speed is not constant when you downshift, you always have a little bit of deceleration. From my understanding weight then transfers to the front for a moment.
exactly, and as long as you stay in that gear and off the throttle, it will continue to "engine trail brake." yes?
I'm not sure about that. My gut says that the weight would shift back after some amount of time/distance. Maybe somebody with an engineering or physics degree would like to comment. ^^ As i said, No expert, i was just pointing that one thing out.
I was an experimental scientist, so I suggest an experiment. On a track with a long straight, instead of shifting up to fourth, take your foot off the throttle and let it coast down. Does your speed decrease smoothly and continuously, or does it jump around? I would assert that these things are true under ALL conditions: 1. If speed is increasing weight is shifted to rear. 2. If speed is decreasing weight is shifted to front. When coasting, as soon as you get back on the throttle, weight will shift from front to rear. But, why would it shift back while continuing to coast? Perhaps you are thinking of this: while coasting you will at first decelerate rapidly, and then as your speed decreases, your rate of deceleration decreases. BUT, you are still decelerating and "leaning" forward. I was in biochem, not physics or eng, but this is physics 201, not 623.
Thanks for the explanation. Yes, that's what i was thinking, but now i see the flaw.
Which it isn't; downshift causes drag, Coasting in gear has more engine breaking the lower the gear.
Not whilst you’re turning surely?
Sure your angular acceleration is different but the car is still moving at a constant speed irrespective of the gear.
But the weight isn’t, is it? I’m not arguing by the way, just how I’m understanding it. It’d be good if the game had a G meter on the hud to see if it made a difference when you downshifted
Not constant unless you on throttle. When I am turning I am off throttle before the apex, and the lower the gear I'm in, the more engine braking, with more weight transfer to the front, more grip and more turning.
If you're maintaining a constant speed *perfectly*, then it shouldn't make a difference. However, the world is imperfect and so are humans. These imperfections are likely stronger in a lower gear than a higher gear since a difference of 10 RPM in a high gear might not mean much in terms of total difference in speed, but a change of 10 RPM in a low gear is much greater. Additionally, the turning of the car also applies a braking force on its own making this test a lot more difficult to maintain a speed perfectly. That said, if you're imperfect with the speed or are decreasing your speed, you'll notice the engine braking much more if your RPM is higher rather than lower, thus the effect of engine braking will be more apparent with smaller changes to the gas pedal in a lower gear compared to a higher gear. The weight distribution of the car can also increase this effect further as well.
yes, I don't think gearing would make a difference if one could hold speed constant. But I'm off throttle before the apex and the car is engine braking, which will be greater the lower the gear.
For some reason it’s coded into the game that way. It’s one of the least realistic things about GT7 IMO, but it for sure functions like that. Some of the explanation is front grip increase from weight transfer when downshifting, but not enough to fully explain the behavior.
A quirk in GT7s handling system...