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This:tup:IMHO the biggest effect of LSD initial is turn-in vs resistance to spinning out.
This:tup:IMHO the biggest effect of LSD initial is turn-in vs resistance to spinning out.
again my %'s arent proven but they make sense, as you dont want more then 95 or less then 40 in any situation
That fits my current settings, I am at 94% and the test car at end of first lap, both outside tires are even shades of white warm, and both inside tires are still mostly dark blue, meaning very little to no slip has occurred.
So no sooner than I have this excellent LSD for my test car than I tried to apply it to the sibling test car; it has exact same setup in every way except for chassis reinforcement is installed on test car #2. Surprise, here the LSD configuration that worked so perfectly on the non-chassis reinforced version of the test car shows some minimal signs of wheel slippage. Interesting finding, seems a great many factors are at play, rigidity of the car being one of them. I shall attempt to adjust the LSD to compensate.
Back on test car #1 (non-chassis reinforced), I switch out the Sport Flywheel the LSD was configured on during setup with the Semi-Race Flywheel, now I am getting slippage again. Not that this is a problem, I had already proven the Sports Flywheel was faster on this car in previous testing anyways, but flywheel is also a factor. LSD settings work when they work and don't when they don't... but I don't have a more scientific explanation for it at the moment.
you say you are at 94% which would mean that you have an initial torque / accel setting of 6 (not sure which one you mean?)
+1@Disavowed: Agree 100% with the use of extremely low initial + accel values to keep the rear of a car in check.
Wow! 10 pages...
Well guys, I've raced for over 15 years and driven high performance tuned cars for over 20 years. What I can say for sure is that the LSD in GT5 works nothing like a LSD in real life. No way in real life will you leave a skid mark on the outside wheel only. Even a fully locked diff will distribute power 50/50 to each wheel resulting in dual skid marks. The only kind of LSD that can vary the torque sent to each wheel is a computer controlled diff. The simplest example would be the one in the Mitsubishi EVO (also known as AYC) and the more complex example would be the one in the Ferrari 458 Italia. That being said, you still won't see those cars smoking it's outside rear tire during cornering.
Now that we've got reality out of the way, back to GT5. Oh, and before I start, remember this: Power is nothing without control. Why? I'll get to that in a moment. I used to tune my cars with extremely high initial torque and acceleration. This really helped on cars with extreme horsepower figures like the FGT, Ford GT Spec II (fully modded), Audi R10 TDI, etc. Yes, you can now get on the throttle much earlier and they aren't as touchy but they were hard to control once you went into power oversteer. In layman's terms, high initial torque and acceleration resulted in better traction coming out of corners but a very unforgiving car to drive. There had to be a better solution.
After hours upon hours of running around the track in the Audi R10 TDI (very well known for it's propensity to power oversteer into a terminal spin), I found that a 6/6/20 LSD figure was the most controllable. Breakaway was a lot more controllable and the deceleration of 20 killed most of that tendency to auto turn while braking. With other cars like the FGT, Toyota GT-One, Nissan R92CP, etc., I also started using these lower values with some pretty good results. So how do you know what values to use? Well, just run around the track being very aggressive with the throttle then go back and watch the replay. Reset your LSD and suspension to it's default values. If your outside drive wheel turns red before the inside wheel then lower your acceleration value and vice versa. Once you have both tires turning red together on power oversteer then leave it. With Initial Torque, adjust in increments of 2 at a time. Some cars will understeer more with lower values and some will steer better. I usually start with the baseline of 10. After you're done with that, then go and tune the suspension to your liking and tweak your LSD some more (in increments of 1).
Just remember one thing: You will never be able to just mash the throttle on corner exit and expect the traction to hold no matter what LSD settings you use. Some people have told me that I lose some forward traction coming out of corners. I don't care; refer to my first bold print above. You'll be more consistent in a car that is easier to control than in one that has max exit traction but which will bite you the first mistake you make.
In the end, it's all about the driving feel. Why do you think you have people bickering over the settings all the time? Because what works for one driver will not necessarily work for another. What we lack in GT5 is "seat of the pants" feel. It's extremely hard to setup a car without that kind of feel.
Just my 2 cents...
Clutch Type LSD
The clutch type has a stack of thin clutch discs, half of which are coupled to one of the drive shafts, the other half of which are coupled to the spider gear carrier. The clutch stacks may be present on both drive shafts, or on only one. If on only one, the remaining drive shaft is linked to the clutched drive shaft through the spider gears. If the clutched drive shaft cannot move relative to the spider carrier, then the other drive shaft also cannot move, thus they are locked.
The spider gears mount on the pinion cross shaft which rests in angled cutouts forming cammed ramps. The cammed ramps are not necessarily symmetrical. If the ramps are symmetrical, the LSD is 2 way. If they are saw toothed (i.e. one side of the ramp is vertical), the LSD is 1 way. If both sides are sloped, but are asymmetric, the LSD is 1.5 way.
As the input torque of the driveshaft tries to turn the differential center, internal pressure rings (adjoining the clutch stack) are forced sideways by the pinion cross shaft trying to climb the ramp, which compresses the clutch stack. The more the clutch stack is compressed, the more coupled the wheels are. The mating of the vertical ramp (80°-85° in practice to avoid chipping) surfaces in a 1 way LSD on over run produces no cam effect and no corresponding clutch stack compression
Budious, the thing is the game code isn't simulating every little shim and gear inside a differential. It's just using some formula to calculate things, and as far as I can see, we need to just forget about real life LSD mechanics if we want to find out what's happening in this game.
Most high powered RWD cars in this game have severe problems with outside-rear wheelspin when turning, which is best addressed with an open diff. That couldn't be more backwards to real-life.
What tyres did you use Budious?
I didn't say it was entirely predictable, move the initial down to 45 or up to 47 and it loses sync, leave initial at 46 and move deceleration up to 48, it loses sync; however, for the very specific specs I have laid out, 46/60/46 handles like a dream in this scenario. Don't expect it to be easily reproducible without considerable effort. This handles considerably worse on my dupe of this car that does feature chassis reinforcement; switch the sports flywheel to semi-race and it's like you never tuned the LSD to begin with. Lots of factors at play...
Race Softs for testing, but I ran 7 consecutive laps on Deep Forest all between 1:12.8 and 1:13.5 with 46/60/46...
If you had read what I just said, and my couple of recent posts above this, I was trying to explain that the greater the variation between initial and acceleration the more understeer occurs, the closer you can bring the two numbers the less understeer occurs. If you look up I just got done explaining how I had come about a rather clean handling and fast LSD setup using an Initial of 46 and an Acceleration of 60.
It was more of a case study in high efficiency slip reduction with the LSD, don't get all grouchy cause I didn't test it on your favorite track.
I may still try your set-up Budious, but I find it hard to take your test and findings seriously. I don't mean that to sound harsh or mean, but it's just completely subjective and personal. Sometimes I swear I am onto the same thing, and when I go back to the car in a few days I can't feel any difference when I completely change everything.
If you think you've found a magic setting that is perfect compared to 1 click different, I really don't think anyone will be able to jump in that car and agree with you.