I've had decent results with the following settings, but I don't drive the high downforce cars, so can't comment on how well the settings work there:
FFB Wheel: G27
Preset: INFORMATIVE
Gain: 100 (Always)
Volume: 30-35 (Adjust per car and per track as necessary)
Tone: 45-60 (I prefer 60)
FX: 0-10 (I use 10 on road cars)
Gain is set at 100 so that all of the available torque in the FFB motors is used. The G27 hardware is relatively weak, so there is little point in setting this lower than 100.
Volume should be adjusted to keep most of the signal in the first three FFB 'buckets' in the Telemetry HUD overlay. Each bucket from left to right corresponds to 20% of the total signal range (1: 0-20%, 2: 20-40%, 3: 40-60%). Spikes such as kerbs and bumps should land in the remaining three buckets (4: 60-80%, 5: 80-100%, 6: 100+% = clipping) and thus give the FFB room to breathe. Steady state load in corners should not exceed the first three 'buckets' (so 0-60%) if you want a good experience IMHO. If the Volume is set too high and the signal starts clipping, the autoscaler steps in and reduces the volume on the fly. This can lead to an inconsistent response to load, which will make it harder to do precision driving. Hence, Volume should be set low enough that clipping is avoided in most cases.
Video showing FFB bucket histogram:
Look at the lower left portion of the HUD. The solid vertical bars show how many of the FFB samples have landed in each bucket during a time window (think 10-15 seconds). The small horizontal yellow bars moving up and down in each column show the relative amount of samples landing in the corresponding bucket right now (the interesting part starts at 4m23s):
Tone balances between Pneumatic Trail (PT) and Mechanical Trail (MT) in the INFORMATIVE Preset. If you want to learn more about the physics of these concepts, see the links at the bottom of this post.
- At 0 (all the way to the left), PT is at 100% and MT at 0%.
- At 100 (all the way to the right), PT is at 0% and MT at 100%.
- At 50, PT = MT = 50% which can be considered "like the tyre carcass and suspension geometry dictates" or "pure".
- At 45 (slightly to the left of the middle), PT is at 55% and MT is at 45%
- At 60 (slightly to the right of the middle), PT is at 40% and MT is at 60%.
In my experience with the G27, the PT portion of the FFB interferes with the ability to feel the rear of the car and moves the focus to what the front tyre contact patches are doing. The MT portion of the signal is responsible for conveying both side force, self centering and how the wheels want to point in the direction the car is actually moving (useful when in a drift). At Tone 50 and below, subjectively it feels like I'm fighting the tyres instead of the car actually telling me what it wants to do, which is why I personally set the Tone at 55-60.
FX is an effects block that controls how much "noise" or "road feel" from bumps and kerbs etc. is added to the signal chain. The higher you set this, the less breathing room there is left for the steering forces that tell you what the car wants to do, which is why I suggest a setting between 0-10. On the road cars I drive, 10 conveys kerbs, bumps, rumble strips and road surface in a satisfactory manner, but it may be necessary to adjust it down on high downforce cars on a car-by-car basis.
Note that
Tone and
FX are just a set of labelled dials that can be hooked up to underlying effects blocks. In the INFORMATIVE preset, they are hooked up as described above. In other presets, they may be hooked up to something completely different, so consult the documentation for any custom presets to learn what effects they control there.
References:
Explanation of the difference (and relationship) between Mechanical Trail and Pneumatic Trail:
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http://forum.projectcarsgame.com/sh...PC-PS4-XBox1&p=1247377&viewfull=1#post1247377
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https://www.racedepartment.com/threads/the-project-cars-ffb-guide-thread.105466/#post-2182158 (one of the sources for the above post)
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http://white-smoke.wikifoundry.com/page/Steering+Geometry (general concepts -- also linked to in the first post)