GT4 Tuning Different from GT3?

[rk]

I thought this issue was settled long ago. The facts that: the brake balance was a relative setting in GT3 and absolute setting in GT4, the physics model is (admittedly by Polyphony) "improved" for GT4, and suspension settings are even measured in different units from GT3 are not enough to convince everyone. So, I've included some quotes and links to get the ball rolling and please, weigh in; post which you believe and why, perhaps we can establish a consensus.

ok, i need help, wut are your settings for drifting in gt4? wtf.. the physics are completely different from gt3, i would say they are worse! a big disappointment. I spent all night tweaking the settings and nothing... all the car does is gets out of control, no where near a drift. I've tried awd, fr all completely modded. Different techniques also. The ebrake is hella weak, and u can't do a brake drift even turning the front brake balance at 18 and rear 8. Sorry for such a negative rant but i'm extremely fustrated...

btw... how come i can't even get a 600+hp car to powerover........... -_-'... all the cars understeers, or maybe it's just me...........

https://www.gtplanet.net/forum/showpost.php?p=1406117&postcount=24

My post was writen from work (so no GT4 to hand), as is this one, so I am going form memory.

I seem to remember that the Brake balance controller scrolling text says that it effects the braking force and application of the ABS system, I'm sure it did in GT3, but can't be 100% with regard to GT4 (and I can't check right now).

To be honest you could remove the ABS bit from my post and it would still hold true for GT4.

For example



Must check on this tonight.

Edited to add:
Right I've had a chance to check on the GT4 setup screen and when you are in the adjustments screen for the Brake Balance controller it says that it controls the strength of the ABS system.

I also checked ASM, and it clearly states that it uses the brakes to control under and oversteer. While it does not mention if it also carries that over to straight line braking, it is quite possible that this does de-activatethe ABS system.

Scaff is a happy bunny once again, more testing to do, going to pick a nice fast car that is sensitive under braking (Ford GT looks like a good choice to me) and have a play around.

https://www.gtplanet.net/forum/showpost.php?p=1603816&postcount=273

The settings are all from GT3...you have to guestimate what they should be for GT4. This may have been stated already, but you could also check the Car Tunings & Settings Forum to see if anyone has done one for the car(s) you need. Quite a few cars have been done, or you could request help there.

https://www.gtplanet.net/forum/showpost.php?p=1560015&postcount=21

 

[RedWolfRacer]

I can tell you that I personally believe, for the most part, GT3 settings will not work well for GT4. The general idea may work, but the actual settings themselves will not. This is more so due to the fact that unlike in GT3, momentum is a huge factor in cornering. Sure in GT3 it was important, but in GT4 when you hit the wall you don't just bounce off, you car's weight must be COMPLETELY deflected before you get off the wall. Turning isn't quite the same way as you need to keep the weight over the wheels, but the momentum and centriputal(sp?) are more of a factor which is why there is a lateral G-force indicator in GT4 and not in GT3.

 

[Scaff]

Just to add some more info for you, click on the link in my sig regarding brakes, you will see that I have detailed the results of my latest tests (as outlined in the quote above).

Mods, it may be relevent to move my GT4 and Brakes thread into this forum rather than the GT4 forum it is currently in. Please!

 

[rk]

Huh. At this point, over 100 people have reviewed this thread yet only 2 have opinions, thank you for your responses, by the way. What seemed like a more esoteric question, whether GT4 tuning is partially reversed from true physics, got far more interest and healthy input. Does everybody already know, nobody care, or is it that GT4 just isn't "new" anymore?

 

[sukerkin]

Calmy RK!

We care, it's simply that it would appear that those of us with the interest and knowledge to attack this are a bit busy elsewhere right now (darned working for a living ... :grumble: ).

Without a revisit to Scaffs good thread on braking, I can report that the brake controller is a definite strength adjuster as well as a force balancer.

My XKR would career madly out of control at the rise at the end of the S/F straight at GV (turning left when I wanted to go right) until I turned the balancer numbers way down from where I normally place them.

Same story for my SL500 at the end of the long straight on the 'Ring (it was okay braking at lower speeds with higher balancer numbers but tapping the brakes at around 180mph kicked the back end out !).

As to the overall differences between the GT4 physics engine and GT3's, I would say that it largely seems to come down to sensitivity to adjustments and certain areas being given greater emphasis than before. The general principles seem to be the same but the actual numbers required differ.

I'm still working my way into tuning up my cars so I don't have much in the way of concrete results as yet. When I do I shall put something here.

 

[rk]

Moi, excitable? Too true, but you really just caught me posting a ruse to keep my thread from sinking beneath the waves of obscurity.
Thank you for the input; on the matter of brake balance, I find it extremely difficult to tune for turn in oversteer. The force/response seems incredibly responsive to suspension changes, using what I consider to be a very precise test, I can end up adjusting the brake setting 10 clicks to get the same braking distance after damper or spring changes. The effect seems especially pronounced with sport tires.
One interesting side effect is that when adjusting the camber wider (less parallel) toward optimal, I would expect the car to turn better but brake slightly longer straight line. Apparently the reverse is true, straight line braking distance improves until camber is at optimal, then diminishes as camber is adjusted to the point the car starts to slide through turns.