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
08-22-2015, 05:28 PM #992
SiNiST3R
Samurai Poster
Originally posted by OdeFinn View Post
@Jouni, downshifting is most important thing with Evora, hanging on higher gear till downshift hits on good rpm area where it won't lock rear, also some small amount brake pedal lifting included during that downshift. Reason for lifting brake bit= brake+ engine brake after gear change is higher than grip, leaving room to keep rear wheels stay on grip until braking harder again.
Downshift when turning in and braking is really difficult, setup has long gears and you can be on smaller gear before your turn radius is risking rear grip if downshifting.


Great advice. Some cars like you to hold off downshifting until really low rpm. Hitting that shift too early upsets the chassis remember the game auto heal toes on down shift.


P.S whoo hoo 100pages

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08-22-2015, 07:49 PM #993
OdeFinn
Bounty hunter
Geo setting X does Y

Some starter guidelines although its really really complex stuff and dependent on many other factors;
Increasing front camber from the default -0.1° to -0.5° each side will dramatically improve the understeer, although the inside edges of the tyres will wear slightly faster. Increasing past -1.0° is great for high speed corners but can compromise low speed cornering, will reduce breaking effectiveness and it will tramline on the road.
Increasing rear camber from the default -1.8° to -2.0° (or higher) makes the car more neutral after you've removed the under steer with front camber. Look at the ratios on the standard settings and maintain the front/rear % delta.
Front toe affects stability or responsiveness of turn in. Front Toe out (standard) makes the car more responsive turn in but causes additional drag in straights. Front toe in is more stable in straight line.
Rear Toe controls the stability of the rear through the corner. Rear toe in (standard) makes the car more stable and apparently the elise toes in more at the rear as the suspension compresses. Rear toe out causes the rear to steer out from the corner, reducing stability.


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Jounijkk
08-23-2015, 08:36 AM #994
Jounijkk
Do a barrel roll!
Good finding Ode. The values of this "forum s2 hero" looks interesting.

Is the toe value including both tyres ( 0,3+0,3=0,6 ) or is it angle for one tyre?

Jouni
08-23-2015, 11:37 AM #995
OdeFinn
Bounty hunter
Don't mix mm/DegMin/DegDec values. GT6 uses DegDec values, ie. If you have Euro setup and it states 0° 15min, input that to game as values 0.25, Dec values rolls till .99 and Min values .59.
Mm to GT6 DegDec needs small counting, you need speed, rpm, gear values and wheel overall circumstance. Using data logger you get others, rest are on settings sheet.

Will transfer those values from real Evora to GT6 later, that linked site had all needed values for replica, except weight distribution, will search that more. Also checking should I mix toe/camber changes as is, or approx values, other means ballast and other slight modification. Values showed for Evora are when half tank fuel and 2x75kg on front seats, dry load then is having different camber and toe. Will see what values will work, I'm going to grab some aftermarket spring values from list etc..

Afaik GT6 uses single side values, overall toe 0.6 is entered as 0.3 on GT6. Sinister had some research on this, I'm just using my ass meter and logic seen on game, logic what is per wheel on all values, camber, toe etc.
08-23-2015, 04:33 PM #996
Jounijkk
Do a barrel roll!
Odes setup for Evora is better than I thought. The reason it was so difficult for me was the body wear. It has gone bad and I didn't notice it. Now the amount of problems has decreased dramatically, only the last turn is difficult. I had to buy a new car before I noticed the body wear.

Again I learned something - visit pit service regularly.

Jouni
08-23-2015, 06:27 PM #997
OdeFinn
Bounty hunter
Last corner needs just gently pre-enter, point and shoot. Bigger balls and easier it goes, if you hesitate to keep throttle fully on floor rear will slip. So good aiming for entry and it turns thru apex with full gas.
Apex of corner is just decoration for Evora, pre-entry and actual entry is Evora's apex, 'coz after that you're more or less on full gas.

Evora's Point and shoot, aka lifting a bit throttle to get nose on desired direction and then locking direction by flooring throttle. Smile
08-24-2015, 03:14 PM #998
OdeFinn
Bounty hunter
Evora Replica for fun, 277hp/346Nm/457pp/1382kg Standard Evora
101/123 [s]103/125[/s] (125/147 founded info, but visual and behavior based same rake 103/125 works better, fixed visual for last time)
8.04 / 10.72 Or stiffer trackday 9.83 / 11.61 (7.44 / 9.67 calculation error springs)
8/7
6/6
5/5
0.3/1.6
0.00/+0.13
5/5 brake bias, standard brakes

Gearbox 300kmh
3.538
1.913
1.407
1.091
0.874
0.741
3.777 Final gear

[S]15/27/19[/s] 15/27/16 LSD

All power parts on stock, no oil change.

Ballast
52kg on position -3
(172kg after weight reduce stage 1 on position +25 gives 39/61, what is stated on few places, but as on Evora S balance)


This is not made to be quick, just being used real life values, except LSD pulled out from hat, as not having yet values what original is using. Gearbox 5th gear slightly shorter than real, 6th close to real, both are calculated due original uses different final gear for those 5th and 6th gears.
Drive height is altered from original 125/147 due game limitation of highest rear height as 145.

Not bad for driving.. Now adding more weight and power to get Evora S.. Smile

Edit: for Evora equipped with "sportpack" install:
Semi-racing exhaust
Catalytic converter: sports
It will get more rpm and more power, after change its 311hp/367Nm/473pp/1382kg

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Jounijkk
08-24-2015, 07:10 PM #999
Jounijkk
Do a barrel roll!
Well done.
Maybe it's time to have one real replica in my garage, just for curiosity.
Good timing, because now I have 2 Evora, one for racing and the spare Evora could go for replica. A setting for Odes replica and b setting for Odes Evora S - so put the model S in here when its ready.

Jouni

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OdeFinn
08-24-2015, 07:53 PM #1000
OdeFinn
Bounty hunter
Evora S - replica 347hp/408Nm/485pp/1437kg
As Lotus engineers said, they didn't change a lot on chassis of Evora for S model, just stiffer dampers and thicker rear anti-roll bar, so that's my guide line to follow and here's results.
Power matched to real life, no supercharger available so putting other stuff in.


101/123 [s]103/125[/s] (125/147 founded info, but visual and behavior based same rake 103/125 works better, fixed visual, last time)
8.04 / 10.72 Or stiffer trackday 9.83 / 11.61 (7.44 / 9.67 calculation error springs)
10/9
7/7
5/6
0.3/1.6
0.00/+0.13
5/5 brake bias, standard brakes

Gearbox 300kmh (made without power upgrades)
3.538
1.913
1.407
1.091
0.874
0.741
3.777 Final gear

[S]15/27/19[/s] 15/27/16 LSD

no oil change.
Semi-racing exhaust
Isometric exhaust manifold
Catalytic converter: sports
Intake tuning


Ballast
107kg on position +3 (This is positive, standard had negative)
(107kg on position +34 gives 39/61, what is stated on few places as on Evora S balance, suspension needs rework if applying this)
Added "sportpack" to normal Evora tune as option too.

Transmission 5th and 6th gear needs work, overall ratio is now near correct, BUT engine rpm's are way lower on those as it would if second final gear exist, maybe just sacrificing top speed of gears and fixing them to go higher rpm.
Ride height wonders me, visual look on game doesn't look right.. Well gotta check more on that.. Fixed more to visual now, few mm more might be needed.
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Jounijkk

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