not reversed, you change the bump, and you can feel the bump has been changed.
its just been watered down a lot, compared to older games.
its been replaced with the offset.
once it was something you would go back to, (bump and rebound) to fine tune the car,
but 3 bump around 10 rebound will work, and forget about it…
all about the offset, springs and rollbars.
the rest of the settings are just practice for moving sliders…
and even if you get the car perfect, next update they will change something to do with grip again,. and wreck your good tunes anyways, if the tunes havent been deleted by the game that is.
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Sir, have you noticed the replays are incorrect…? I had a rsr on spa it kept shifting into first gear when I didn’t and wouldn’t go into 6th gear for the long straight just screamed out 5th gear.
I find that it’s more like bump 4 to 5 but less than 5. Rebound no higher than 7. At least this is how it feels without using any adjustable aero.
Update: Experimenting right now with setting rebound to 1/100th the spring rate. Working out pretty good so far with this 2002 M3 GTR. Spring rates are 858 so I set rebound to 8.6 ( rounding up ). Bump is currently 4.7 and the car feels nice 'n compliant.
One of the biggest reasons tuning doesn’t work out too well is because the spring rates constantly change. This needs to go away. It’s not helpful at all. This car started out with 858 and is now at 834 after a few races. This makes 0 sense.
About the only thing I found useful with the suspension offset is with a tail happy small car, I can change the rear offset negative and it calms the car down (quite a bit). The negative side of this is trying to tune the car to turn again…
What E92 M3 in the game are you guys using for those spring rates. Regular M3’s have a divorced spring and shock, the M3 GTS has a true rear coilover setup. 550lbs for the front and 400lbs for the rear GTS spring rates. Spring rates also used for people converting their regular M3’s to true rear coilovers. But whatever, the spring rates that they gave to the regular M3 with thr upgraded suspension for all games before MS23 are the same front and rear so…
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At least with the E92 M3 example I used, that was mostly just referring to what the car was running IRL vs in Forza
I just don’t really believe at all in comparing IRL suspension specs to Forza; I just highly doubt Forza even attempts to simulate each car’s unique suspension setup. The game probably doesn’t differentiate between divorced spring/damper setups and coilover setups, for example.
We know this to be true, since they can’t even simulate the difference between a IRS and a solid rear axel.
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I’m not in advanced tuning too. Only brakes, tire pressure and transmission. Let’s advance ourselves!
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I’m getting better. I plateaued at 4670-4760 for months, then someone gave me their tune for the zonda and that week went into mid 4800s and now two weeks later using my own tunes I’ve stayed in the 4800s and am flirting with 4900.
That being said my evora s tune was better, got three wins with it, my Alfa this week only got 1 win leading whole race and only against 7 ppl at like 3 am haha.
But my B class evora didn’t have to go up against formula mazdas so that might explain it 
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You can set your spring rates in the garage tune shop but as soon as you go to a free play race or something and just happen to check your spring ratio it’s off save your setup and delete the auto save. Seems to help
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I wasn’t trying to match the GTS spring rates. Was aiming for Ohlins or something a lil more suited for track. Well aware of the divorced to coilover spring rate conversion ( I own 2 E92s IRL with Ohlins ).
It appears the game auto-adjusts spring rates relative to the car’s fuel load.
When not in a race, the car’s fuel load is 100%, and the spring rates are set relative to the weight of the car with a full tank of gas.
When fuel load is less than 100% on-track, the game seems to subtract the weight of the missing fuel from the spring rates.
If you change your spring rates on-track when your fuel load is less than 100%, then the game auto-increases to your springs rates later when your tank is full again to accommodate the additional fuel weight.
Really? That seems…unnecessary and confusing. 
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This is how I’ve tested it:
• I set/check my spring rates in the garage from the main menu before loading into a track/race.
• I load up a race (free-play, or online, or wherever) and check my fuel load there, then I check my spring rates again.
• When my fuel load at the track is less than 100%, my spring rates are automatically lower than they were back when I was in the garage at 100% fuel.
• When I top off my fuel load to 100% at the track, my springs automatically go back up to exactly what they were in the garage before I went to the track.
• When I adjust my spring rates on-track while my fuel load is less than 100%, my spring rates automatically increase whenever my fuel load is 100% again.
Anyone can reproduce this & see for themselves.
If there’s another explanation unrelated to fuel load for the auto-adjusting spring rates, I’d love to hear it.
Oh don’t get me wrong, I wasn’t saying I don’t believe you. Just that that seems odd that they would implement things that way.
They probably thought it was clever, but it leads to confusion when players don’t know why their spring rates never stay the same.
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I know why spring rates change. I just think it’s silly. If you’re trying to simulate how car suspension behaves, you don’t do so by changing the spring rates based on the car weight like this. Sure, we choose our spring rates based on the weight of the car, but this… this is overkill.
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It probably has to do with how they worked out the physics algorithms without knowing how the physics of the automobile actually work. It would be interesting to see or know if other games function in a similar manner.
When setting up the cars I always set the spring at 100% fuel. When you lower the fuel rate for the race 99% of the time the car will still handle well.