Post: GT6 Game Physics Testing
04-30-2014, 09:03 PM #1
SiNiST3R
Samurai Poster
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GT6 Physics Testing & Analysis

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Lap Battles
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Here are some videos (I can only add 2 so Ill link post where videos are posted when I can)



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The following 9 users say thank you to SiNiST3R for this useful post:

Jounijkk, kazzbakkisback, nextgole, OdeFinn, P$ycho, policedu, q-k, turbo_nova2l, tyronekfc
07-19-2015, 02:18 PM #938
OdeFinn
Bounty hunter
Tuning progress, polishing needed..

84/84
4.65/3.98
5/4
5/5
3/3
0.4/1.2
-0.05/+0.05
6/6 bb
10/38/29 (10/37/28 better)
RAYS 57Xtreme wheels, no aero parts.
1:25/1:20 average big numbers.

The following 2 users say thank you to OdeFinn for this useful post:

bread82, Jounijkk
07-19-2015, 07:24 PM #939
Jounijkk
Do a barrel roll!
@Ode.
Thank You. I must test it, looks intresting.
I have some questions, just curious of some background:
Why did You go so low in ride height and why rake 0?
How did You found rear suspension and why so soft? If You check from data logger ( ride high ), is the relationship between front and rear ok?
I have some problems with the rear end in my setup- it's on the edge of sliding. When tyres are getting older, my setup becomes very dangerous. I could use little bit steadier rear on my 86 and bigger safety margin. I think some parts of Your setup will help.

Jouni
07-19-2015, 09:51 PM #940
OdeFinn
Bounty hunter
Low height to get soft springs and dampers work together, minimal changes on dynamic camber, maximising contact area of tires all time. Soft rear to keep tire contact tarmac during weight transfer.
Idea was put car full balanced on springs and then add just enough to keep body roll identical (plus minus needed softness).
No need for rake, because low camber front and medium rear with softer rear springs. If I put tighter springs rear then rake can be used, and front needs more camber and toe after that. So low powered car at this type of tune works, or I like it Smile
My quick calculations about spring stiffness is taking care of braking and acceleration dive/squat, it should carry weight+dive/squat easily. Data logger will tell did I count it right.

Had to check what data logger says, haven't check, car feels fine under, but just curiosity gotta check how data shows it.

The following user thanked OdeFinn for this useful post:

Jounijkk
07-20-2015, 09:15 AM #941
OdeFinn
Bounty hunter
@Jouni, data logger ride height was same as I expected, smooth moves, even during tire lockups base movement is gradual smooth, fragmented of course during lockup, but base movement just right, no flats, lowest and highest points on shape. What I should see more from here?
Tested online full real with very fast tire wear, handling stays thru whole tank, had to brake bit smoother after lap 17, fuel ended on lap 19 last corner. Full throttle thru corners till fuel ends.
F 4/5
R 5/6
What was left on tires when fuel ended.

The following user thanked OdeFinn for this useful post:

Jounijkk
07-20-2015, 02:20 PM #942
Jounijkk
Do a barrel roll!
My fuel ends 1,5 lap earlies ( lap 18, turn 4 ).
Tyre wear when fuel ended:
LF 3
LR 4
RF 5
RR 7
This means you Ode will be much faster with Sinister, I have zero changes. You can make faster lap times when my tyres worn out. This is a concrete difference between good and not so good setup - it's easy to understand, why I'm spending time to learn. I must slow down very much before fuel ends.

I hope Sinister will comment about data logger, what to look for and what to do, what is the goal. I'm looking mainly:
1) relationship between left front and left rear. Also right front and right rear. Same curves are my goal.
2) how much the suspension travels. If it travels too little, I go softer springs, too much I go stronger springs.
3) that little movement with high frequency ( sahalaita ) ==> dampers
4) difference left and right side of the car ==> arb.
I don't know, is this right things to do, but this I'm doing. Sinister and Bread will tell what is right.

Jouni
07-20-2015, 03:11 PM #943
OdeFinn
Bounty hunter
1) goes on line when on sweeper and during weight transition from side to side.
2)resist enough on full brake without bottoming, squat rear smoothly, but leaving reserve for peak. Mostly +/-20mm and maxing +/-40mm when on heavy pressure, no flat line on either end= reserve left, no bottoming or too much extension.
3) zero fragmentation/sahalaita, except locking tires, and then it still is only small variation on normal dampening curve, suspension reacts quickly, so quick changes can be seen, no re-bouncing after quick change.
4) not huge changes, going on line, no tire liftoff, traction on road all time. Playing with arb can backfire your spring+camber+toe setup

You should run my BRZ S on willow and take data log and check, I'm pretty happy with suspension movements.
Toe is used to balance front turning and rear grip level so equal at car has no tendency to over or under steer, but both can be done easily if needed or wanted.
Build Subaru and use my settings including wheels and let me know your impressions from it.

The following user thanked OdeFinn for this useful post:

Jounijkk
07-20-2015, 08:55 PM #944
Jounijkk
Do a barrel roll!
@Ode. Setup is very good, time 1.25,393 ( arcade mode ). Data logger is ok. Balance is good, rear end is good. Front end is ok, I would like to add more control to the front end ( car want to swim away from my hand between apex and exit point. i have some program in turn1, 2 and last turn ). With gently tyre wear, this setup is very good for online. Well done.

Jouni

The following user thanked Jounijkk for this useful post:

OdeFinn
07-20-2015, 10:41 PM #945
OdeFinn
Bounty hunter
@Jouni, will check that front(prob rear) nearby days.
Thanks for "review" Smile
That corner is place where driver gives too much steering, turning less makes car turn better Winky Winky
07-21-2015, 06:16 PM #946
Jounijkk
Do a barrel roll!
I have tested all of Ours ( Breads, Odes and mine ) setups in online races, all are very good and fast. I haven't found any significant differences in lap times, all are winning setups. Odes setup seems to be most gently for tyres. Driving style makes big difference in Tyre wear.

Jouni

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