Help needed with LSD

[LarryL]

I need a bit of help here.

Between GT5, seeing the car in real life and seeing how much the car sells for at Barrett Jackson.......I've decided that the muscle car I'm going to actually buy when I eventually have the money to waste on such things is a 67 Mercury Cougar XR-7. I think it's a very distinctive and attractive looking car that every time I see it, grows on me more. I think it looks way better than the Mustang of the same years. And since I'll realistically never own my dream muscle car of a 71 'Cuda because I've also seen how much THEY sell for at Barrett Jackson, the car I'm now setting my sights on is the XR-7.

I will own one eventually, but in the meantime I'm enjoying the car in GT5, and as you'd expect, I'm trying to make it as realistic as possible in terms of what I could realistically do to the car to make it a fast, and good car to drive around.

Anyway, one thing I know I would do, in fact if I ever found the car for sale, it's probably already done, is a typical "locking dif" so I can put the power down. So I'm going to put the upgraded LSD if someone here is able to tell me what settings to put on the LSD to make it that typical "locking dif" that if I went to a speed-shop, they'd put in in exchange for money. Because I have absolutely no idea how to set up LSDs. I know I could lock the diff without help with just the acc sens, but what I'm looking for are the setting to make it like that locking dif I would buy.

Thanks for any help.

 

[Stotty]

I wouldn't worry about trying to replicate the real settings as GT5 rarely matches the real thing if you apply the same settings.

I'd start at 10 12 5

If the inside wheels spins 1st on corner exits (inside tyre turns red) increase the accel, if the outside tyre spins 1st (outside tyre turns red) decrease the accel. Change in increments of 1 (LSD settings are very sensitive).

Most of my cars have a LSD in the range of 5 10 5 to 12 15 5, rarely would I recommend a higher accel than 15 (unless you have exceptional throttle control).

If the car oversteers on the brakes whilst turning in (unlikely in a front engined car unless you're running a lot of ballast at the rear) increase the decel... but I'd recommend you keep this at the lowest setting unless you have a major issue as decel causes understeer.

 

[LarryL]

Thanks for the tips.

 

[MrGrado]

I use much higher LSD values than most people and I have made plenty of successful tunes with high LSD values.

To simulate a locking diff for a muscle car you really need to use very high LSD values I would think. You would want to at least try it.

 

[brianwong]

Wouldn't a locking diff be low accel since that appears to make the diff lock more quickly?

 

[MrGrado]

I don't agree with that.

 

[Motor City Hami]

Agree with MrGrado. Higher numbers, more locked diff and higher initial means faster to lock.

 

[brianwong]

Oh okay.

EDIT: Doesn't a locking diff basically make both wheels spin at the same speed no matter what? That would be lower initial torque and lower accel, since lower accel makes the inside tire turn red on the tire wear thing, and that means both wheels are spinning at the same speed.

 

[esoxhntr]

you're kinda right but no.

there is no way to get a true locked diff in this game as you would see in off-road vehicles and/or drag cars. nor would you really want one for circuit racing anyways. an open diff allows the wheels to turn at different speeds, a locked does not. a car with a locked diff has a terrible time trying to take a corner on anything but loose surface which allows the tires to slip.. on tarmac, it will buck and eventually break stuff.

what we have in the game are open differentials with an LSD - there's a big difference. an lsd just detects slip and transfers power to the other wheel. when you are cornering, it will be the inside wheel that will slip first since it i) will have weight removed off it and ii) will be travelling a shorter radius. a completely open diff 'channels' power through the point of least resistance.. ie. the inside tire that has less weight and travelling a shorter distance which makes it more prone to wheelspin. so an open diff makes a bad situation worse really. works the same way in real life, take a car with an open diff onto snow and you'll note the one wheel peel. the lsd attempts to fix this situation by allowing power to go to the wheel(s) other than the one with 'least resistance'

accel just tells how much power to transfer to the other wheel. it does not limit/determine how much power goes through the diff.. that's determined by your right foot and gearing.

 

[Stotty]

You can do whatever you want to try and replicate real life, but it won't necessarily make the car good to drive.

If both tyres spin at the same time the diff is working correctly and is, in effect, locked.

I don't see a benefit to running higher settings once you get to that point.

I use much higher LSD values than most people and I have made plenty of successful tunes with high LSD values.

Just because a higher setting works doesn't mean it's the optimal setting.

 

[Johnnypenso]

[post=4641242]Motor City Hami's LSD Tuning Guide[/post]

In my opinion, the definitive guide to LSD tuning.

 

[kleefton]

A little off topic but i must sAy you can sometimes hear it when you need to run higher accel. The engine sounds the same way it would if you had a slipping automatic transmission.
In my world i like accel values in the mid twenties. Higher than that there is too much understeer.
Lower than that and i can hear and feel slip. But thats on street cars of around 500pp
The game changes for the higher powered cars i'm assuming.

 

[Johnnypenso]

A little off topic but i must sAy you can sometimes hear it when you need to run higher accel. The engine sounds the same way it would if you had a slipping automatic transmission.
In my world i like accel values in the mid twenties. Higher than that there is too much understeer.
Lower than that and i can hear and feel slip. But thats on street cars of around 500pp
The game changes for the higher powered cars i'm assuming.

What you're hearing is wheelspin in one of the tires and the engine revving above where it should be given the speed the car is travelling. If it's extreme enough it shows up as a red tire, but at lower values it doesn't show up at all.

 

[Stotty]

[post=4641242]Motor City Hami's LSD Tuning Guide[/post]

In my opinion, the definitive guide to LSD tuning.

Interesting... I tune to what I feel in the game, and if the changes make a car faster... sometimes there are combinations of diff, toe and camber settings that just work, maybe beause of some combination of codes you're finding in the GT5 physiscs engine, who knows

A little off topic but i must sAy you can sometimes hear it when you need to run higher accel. The engine sounds the same way it would if you had a slipping automatic transmission.In my world i like accel values in the mid twenties. Higher than that there is too much understeer.
Lower than that and i can hear and feel slip. But thats on street cars of around 500pp
The game changes for the higher powered cars i'm assuming.

Yes, I know that sensation.

Recently, I've been trying diffs with initial of 5. Seems to Allow a higher accel rating.

However, overall I do think most 'typical' players of the game would benefit from running lower accel settings than a lot of the tunes I see recommend... IMO, lower accel settings than are typically recommended are faster even for the highly skilled player (though Aliens can use higher settings to their benefit if what I've seen on some of their tunes).

 

[Johnnypenso]

Interesting... I tune to what I feel in the game, and if the changes make a car faster... sometimes there are combinations of diff, toe and camber settings that just work, maybe beause of some combination of codes you're finding in the GT5 physiscs engine, who knows

Yes, I know that sensation.

Recently, I've been trying diffs with initial of 5. Seems to Allow a higher accel rating.

However, overall I do think most 'typical' players of the game would benefit from running lower accel settings than a lot of the tunes I see recommend... IMO, lower accel settings than are typically recommended are faster even for the highly skilled player (though Aliens can use higher settings to their benefit if what I've seen on some of their tunes).

I have followed your tuning efforts and used a couple of them for recent TT's and they are good work, you definitey have a handle on tuning:tup:👍. As we all know, there are no cut and dried rules for GT5 that are universal. Something magical on one car, may be rubbish on a similar car. Hami's Guide has proven to be the best starting point for tuning an LSD I've found and it seems to make intuitive sense as well.

High LSD settings don't work for me either. I rarely use anything above 15 when using tires matched to the cars' power and weight. Using RS tires on a 450PP car requires different settings of course, compared to the same car on CS tires for example. I suspect aliens can drive almost anything fast...lol..but I don't think some of their settings would benefit the typical GT5 user.