4WD front LSD setting question

[Taz69]

Ok guys on a 4wd the FRONT LSD setting I see some guys use 5 for the brakeing 15/20/5 and I see some guys use high numbers like 30 15/20/30.. Wouldnt a high number in the brakeing part of the front LSD make a car that already pushes push even worse?? I dont tune a lot 4WD drive car so trying to figure was to help them turn. Would a front LSD setting of say 5/15/5 or 5/10/5 give you the most grip for turning on a 4WD drive cars front LSD???

 

[JackWilson]

I personally do not know the answer but i would tune the front LSD of a 4WD car the same as i would tune the LSD of a FWD car. That is if i tune anymore

 

[SAPPH]

Well, i don't know about others, but i do like experimenting 4wd tune especially on R34 GT-R since that car is notoriously known and prone to understeer. I'll always set the front LSD to be quite loose with 5/15/10 or sometime 10/15/10 and rear LSD at 10/30/20 or 15/25/10, depending on the suspension setup. Oh, and i used torque sensing at 25/75. Effectively making the car acting like a bit of RWD.

 

[Taz69]

SAPPH can you post your tune for a R34 GT-R springs dampers the entire thing. Im just getting into tuning 4WD and just got that car and dang it pushes bad...

 

[NEWDRIVER2]

Ok guys on a 4wd the FRONT LSD setting I see some guys use 5 for the brakeing 15/20/5 and I see some guys use high numbers like 30 15/20/30.. Wouldnt a high number in the brakeing part of the front LSD make a car that already pushes push even worse?? I dont tune a lot 4WD drive car so trying to figure was to help them turn. Would a front LSD setting of say 5/15/5 or 5/10/5 give you the most grip for turning on a 4WD drive cars front LSD???

Well, i don't know about others, but i do like experimenting 4wd tune especially on R34 GT-R since that car is notoriously known and prone to understeer. I'll always set the front LSD to be quite loose with 5/15/10 or sometime 10/15/10 and rear LSD at 10/30/20 or 15/25/10, depending on the suspension setup. Oh, and i used torque sensing at 25/75. Effectively making the car acting like a bit of RWD.

Your setting for the LSD same what I'm doing with mine but little higher as for Front 14/25/10 and for Rear 14/36/12 .
Take a look on this car and you will know what I'm saying . Maybe you take it for a spin
It's three in one tune .

https://www.gtplanet.net/forum/showthread.php?p=7704779#post7704779

ND

 

[CyKosis1973]

SAPPH can you post your tune for a R34 GT-R springs dampers the entire thing. Im just getting into tuning 4WD and just got that car and dang it pushes bad...

Easy steps to reducing wheel spin in FWD cars.

• Set your ride height so that the front is higher than the rear, don't be afraid of 20-30mm differences.
• Springs. Match your weight distribution, but increase the front spring by 5-10%. (eg, 60/40 weight distribution, 70%/40% spring strenght)
• Dampers. Set front EXT high (7 or 8), set rear EXT low (3 or 4). Match front COMP with rear EXT and rear COMP with front EXT.
• ARB. Stronger rear than front (2/5 or 3/5).
• Camber. Standard 2.0/1.0. You'll likely need to change these depending on how the car rotates.
• Toe. -0.15/0.15. Same as above.
• Diff. Set INT as high you dare, but not so high as to cause understeer, start at 8 and work up toward 14. ACCEL, set slightly higher than INT, too low and the inside wheel will burn, too high and the outside will burn. Find the balance. BRAKE, similar to ACCEL, but when you're not on the power. BRAKE has nothing to do with your brakes and everything to do with engine braking.

Gears will likely play a part too, follow any of the methods listed in the sticky threads above...

{Cy}

Exactly the same, but set positive front rear toe and even the ARBs. Go and read the stickies on how to setup diffs...

{Cy}

 

[Taz69]

Exactly the same, but set positive front rear toe and even the ARBs. Go and read the stickies on how to setup diffs...

{Cy}

What is "set positive front rear toe" What do you mean? Do you mean set positive toe in the front and rear? And this is about 4wd cars not FWD cars or are you saying set the front LSD of a 4WD car like you would a FWD..

 

[SAPPH]

What is "set positive front rear toe" What do you mean? Do you mean set positive toe in the front and rear? And this is about 4wd cars not FWD cars or are you saying set the front LSD of a 4WD car like you would a FWD..

I think you can follow the FWD tune as a reference since FWD is known to understeer on accel during turning, so the goal here is to reduce understeer.

That, fine tune with rear LSD to make it a little bit oversteer since oversteer in 4WD is easily recoverable. At least, that is what i've done since GT2.

Ultimately, find the tune that suits your driving style.

 

[Motor City Hami]

As the self appointed master of the LSD here on GT Planet, I do have to admit that 4wd LSDs remain perplexing to me. It just isn't as easy to see which wheel needs the help. The problem is that I have had success with using two very different LSD setups and both were fast.

I won a recent FITT Tuner Challenge using the following LSD settings.
On Tarmac:
LSD Front 10/12/7
LSD Rear 8/10/5
Front/Rear Torque Split 50/50

On Dirt:
LSD Front 15/35/7
LSD Rear 10/12/14
Front/Rear Torque Split 50/50

These two are similar in the use of 50/50 torque split and that the front LSD is using higher values than the rear for initial torque and accel. The thoery being to use more of the front drive to pull the car around the corner. It worked great. If anyone has raced against Ronald6 and his Subaru on the Nurburgring, you have probably spent a bit of time watching his tail lights drive away from you.

I finished on the podium of another FITT Tuner Challenge using these LSD settings.
LSD Front 7/8/6
LSD Rear 7/21/10
Torque Split 30/70
This was equally good at rotating around the apex. This setup thoery tried to minimize the affect of the front drive and get the car to act more like a FR drive train. The problem is that this also worked very well.

Because these two setups were almost equally fast, it left me without conclusive evidence to the real effect of moving settings up or down. I need to do more testing of this in 2.09, but I haven't had time to drive a 4wd yet.

 

[SAPPH]

As the self appointed master of the LSD here on GT Planet, I do have to admit that 4wd LSDs remain perplexing to me. It just isn't as easy to see which wheel needs the help. The problem is that I have had success with using two very different LSD setups and both were fast.

I won a recent FITT Tuner Challenge using the following LSD settings.
On Tarmac:
LSD Front 10/12/7
LSD Rear 8/10/5
Front/Rear Torque Split 50/50

On Dirt:
LSD Front 15/35/7
LSD Rear 10/12/14
Front/Rear Torque Split 50/50

These two are similar in the use of 50/50 torque split and that the front LSD is using higher values than the rear for initial torque and accel. The thoery being to use more of the front drive to pull the car around the corner. It worked great. If anyone has raced against Ronald6 and his Subaru on the Nurburgring, you have probably spent a bit of time watching his tail lights drive away from you.

I finished on the podium of another FITT Tuner Challenge using these LSD settings.
LSD Front 7/8/6
LSD Rear 7/21/10
Torque Split 30/70
This was equally good at rotating around the apex. This setup thoery tried to minimize the affect of the front drive and get the car to act more like a FR drive train. The problem is that this also worked very well.

Because these two setups were almost equally fast, it left me without conclusive evidence to the real effect of moving settings up or down. I need to do more testing of this in 2.09, but I haven't had time to drive a 4wd yet.

That is so true.. In the end, it depends on the driving style..

 

[Motor City Hami]

That is so true.. In the end, it depends on the driving style..

But all of those tunes were built for me and my driving style. That's what's wierd.