Light LSD tunes to make 450-550pp cars behave

[vonMarshall]

Hi there

I am interested in getting some help just tuning my LSD to make selected road cars behave in a more neutral manner.

I tend to keep my road cars set up like the real track-day specials I have owned in the past:

• Add sports exhausts / intakes / catalytic converters and ECU to give a bit of boost but not too much.
• Weight reduction Stage 1, Carbon Bonnet and lighter windows to take a bit of weight out but again not too much.
• 6-speed box for tighter ratios, lighter fly-wheel / prop shaft / racing brakes
• Sports suspension... I put both Soft and Hard on so I can select for each track) but not adjustable

• And finally, a customisable LSD.

It is this latter part that I wanted some advice / guidance with. I have read the threads regarding what they do but wondered if any of you had a standard starting point for the following types of cars:

FR Cars
a) for lower tuned cars like a Honda S2000
b) for cars like the BMW M3, Vantage V12, Alfa 8C etc at about 500pp

4WD
a) for cars like the Lancia Delta or Mitsubishi Lancer at about 450pp
b) for punchier cars like a Lambo Gallardo at 550pp

MR cars
a) for mild cars like a Lotus Evora or Elise
b) cars like the 458 Scuderia / Maclaren MP4-12

Ideally I would like a generic start point for LSD settings for each type and then I can lightly tweak them myself from there.

My primary goal is always to make a car settled and as neutral under acceleration and braking as possible.

As an aside, I use the Dual-Shock and am unlikely to get a wheel in the near future.

Any advice most welcome!

 

[Quakebass]

Well, it really varies from car to car - some have understeer, some have oversteer, and you need to tune accordingly. I'm not so great with 4WD, but generally speaking, if your car has oversteer (meaning it's tail-happy), then you should increase the sensitivity of the LSD, and vice versa. (Understeer is when you turn the wheels, but the car doesn't turn as far as the angle the wheels are pointed). So it comes down to experimentation, preference, and then driving style, really. Unless a car is to one extreme, then I'd say at first try 5-point increments (assuming it's the same as GT5, I don't have 6 yet).

I generally like a wee bit of oversteer, more so in the brakes.

 

[SGETI]

https://www.gtplanet.net/forum/threads/the-ultimate-gt5-link-collection-for-tuning.204024/. This a must read full of terrific info. Motor city hemi has great info on LSD settings. Good lick

 

[sean10mm]

LSD Accel This setting has one purpose, to manage inside and outside wheel spin. If the inside wheel spins first, raise this setting. If the outside wheel spins first, lower this setting. Most often the tire in need of help will turn red upon throttle application from the corner apex.

LSD Decel This setting has one purpose, to manage stability under braking, turn-in and when coasting. If your car is loose (oversteer) in these situations, raise this setting. If your car has understeer during these conditions, lower this setting. Nearly all of my under 550PP street car tunes have settings between 5 and 7. On pure race cars like LMP cars, JGTC, FGT, F1, 2J, etc., I run much higher decel settings.

LSD Initial Torque This setting determines how much power is needed to activate the diff – to make it lock. What the means in GT5 is that a higher number produces more understeer and a lower number produces more oversteer. It is that simple. Since the 2.09 update this characteristic is more pronounced and even more noticeable from apex to exit.

The LSD accel value makes the most difference in powerful RWD cars, you can instantly make a difficult car easy to drive by lowering it if you constantly overload the outside tire on acceleration.

 

[DigitalBaka]

https://www.gtplanet.net/forum/threads/the-ultimate-gt5-link-collection-for-tuning.204024/. This a must read full of terrific info. Motor city hemi has great info on LSD settings. Good lick

This. Learned everything from @Motor City Hami and I'm not convinced anyone else sets an LSD better... besides me.

My process: start with initial as is at 10 and concentrate on accel and decel to make the most impact. For lower powered cars you can probably start around 15-20 for accel, 10-12 for high power. To tweak, drive it and watch your tire temp when/if it breaks. If the outside tire goes red first, lower accel. Raise it if the inside goes first. Once they go together use initial to fine tune the behavior.

Decel stabilizes braking. I usually leave it near open (5-8) if I don't have a squirrelly rear under brakes. MRs usually need a good bit. Just start from the bottom and bump it up until the back stays in the back. Or until it rotates to your liking.

AWD I find tends to be more like FWD, which I am not great at tuning. You can usually set some pretty high values to get a good set.

 

[vonMarshall]

This. Learned everything from @Motor City Hami and I'm not convinced anyone else sets an LSD better... besides me.

My process: start with initial as is at 10 and concentrate on accel and decel to make the most impact. For lower powered cars you can probably start around 15-20 for accel, 10-12 for high power. To tweak, drive it and watch your tire temp when/if it breaks. If the outside tire goes red first, lower accel. Raise it if the inside goes first. Once they go together use initial to fine tune the behavior.

Decel stabilizes braking. I usually leave it near open (5-8) if I don't have a squirrelly rear under brakes. MRs usually need a good bit. Just start from the bottom and bump it up until the back stays in the back. Or until it rotates to your liking.

AWD I find tends to be more like FWD, which I am not great at tuning. You can usually set some pretty high values to get a good set.

Many thanks for all of this. I appreciate the guide on where to start and look forward to trying to get my M3 to settle down a bit tonight.

 

[BlueShift]

How about a LSD challenge guys ? Fixed setup but the LSD ?

 

[Motor City Hami]

How about a LSD challenge guys ? Fixed setup but the LSD ?

I like it. 👍 Comfort hard tires on a really crappy handling car sounds like a riot.

 

[BlueShift]

You would need a little PP to make that interesting because noone would test a 2CV (I know, I tuned some ).

Anyway an "alway spinning car" isn't that much of a challenge either ! Choose curve arc - -2/+2 track dependent somehow - then x/5/5. Voila.

Sport medium, half grip, this would be a true challenge. High grip is even better because you talk about direct performances of the car imho.

We had lots of discussions about LSD, and comp / ext, two years ago if my memory serves well on GT5, I think I would be a good competitor, but still, I'm a comp > ext guy and that won't change (the things that may changed is now I'm testing comp < ext with low aero cars)

Who makes a setup ? I suggest the M4, since everybody has her. Or something rarer like a car that noone ever setuped in GT6, like that strange looking Nissan R31 or something if it's still in the game.

4WD or not ?

 

[DigitalBaka]

*coughgt350rcough*

 

[Motor City Hami]

Who makes a setup ?

No setup. Just purchase the fully customizable suspension and go with stock settings.

Yellow Bird on sports hard?
Enzo
LFA

 

[BlueShift]

Yellowbird is not interesting because LSD will lock whatever your settings are, esp with sport hard and esp with stock susp. So what is the point ?
LFA can be interesting, just purchased the Nür edition + sport soft, made a few turns around Silverstone, if you talk about crap handling, you got it

Anyway, whatever car it is, I'll request Toe @ 0/0, no driving helps but ABS 1 (sorry, DS3).