In need of some help for an A700 Lamborghini Murcielago Tune

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1

I seem to be having an issue with a build/tune i have for the LP670-4 SV. I have something, but coming out of a corner, the cars rear tyres light up and lose all traction, and the car doesn’t feel at all planted on corner exits. It also seems to not be as fast as any other cars (But could this be due to the abundance of Xbows, RX7’s, F50’s and other LB cars?).
Can anyone suggest some solutions for making this more stable, planted and less likely to lose grip? Any other suggestions for improvement would also be great

Car - Lamborghini Murcielago LP 670-4 SV
Class - A 700

Stats

Speed - 7.6
Handling - 5.5
Acceleration - 8.8
Launch - 9.1
Braking - 6.1

Power - 703Bhp
Torque - 518 Lb-Ft
Weight - 4083 Lbs
Front Dist. - 40%
Displacement - 6.5l

Benchmark
0-60 Mph - 3.184s
0-100 Mph - 7.302
Top Speed - 201.2Mph

60-0 Mph - 108.4 Ft
100-0 Mph - 255.5 Ft

Lateral G’s @
60 Mph - 1.26
120 Mph - 1.35

Build

If it isn’t listed, it hasnt been changed

Conversions
RWD Conversion

Engine
Race Intake
Sport Intake Manifold/Throttle Body
Race Valves
Race Pistons & Compression
Race Flywheel

Platform and Handling
Race Springs & Damping
Race Front ARB
Race Rear ARB
Race Chassis Reinforcement & Roll Cage

Drivetrain
Race Differential

Tyres and Rims
Sport Tyre Compound
Upgraded Front Tyre Width (275/30R18)
Upgraded Rear Tyre Width (355/30R18)

Aero and Appearance
Forza Front Wing
Forza Rear Wing

Tuning

Tyre Pressure
Front - 28.0
Rear - 28.0

Gearing
Final - 4.06

Alignment
Camber Front - -2.6
Camber Rear - -1.1

Toe Front - 0.2
Toe Rear - 0.0

Caster - 7.0

Anti-Roll Bars
Front - 21.00
Rear - 14.30

Springs
Front - 984.6 Lb/In
Rear - 1149.2 Lb/In

Ride Height
Front - 3.4"
Rear - 3.0"

Damping
Rebound Front - 8.9
Rebound Rear - 10.4

Bump Front - 4.1
Bump Rear - 5.1

Aero
Front - 237 (Max)
Rear - 382 (Max)

Brakes
Balance - 52%
Pressure - 150% (Though this is subjective, dependant on driver)

Differential
Acceleration - 21%
Deceleration - 10%

Thanks in advance

2

Hey CatMan,

I will give you info on my S class Lambo but won’t be able to do it till tomorrow (I live in NZ so it’s 12am here). But just some background info on it- I use it in a championship with my brothers who are in the UK, the chmp rules are no leaderboard cars, no aero upgrades, no 4wd and max handling of 5.6. Really fun. So as you’d guess my tune will have more power and be lighter than yours, corner exits are not too much of an issue for me with a little throttle control.

3

good car

4

@comad, Thanks for that, I look forward to your message with regards to your S class version. It has potential, since i can get it just outside of the top 1k (I’ve managed to do this on Le Mans Old, Nurburgring Nordschliefe & +GP, Laguna Seca), but with increased stability, it can get higher. Which is why i’ve asked for your guys help.

@CredulousPoem08, if you’re referring to the car, yes, its a really nice car. As for the tune, thank you if thats what you’re talking about, but it can be better, hence why i’m here asking for a hand. But thank you.

I’ve also noticed, the Flywheel could more than easily be replaced for a Driveshaft (Which i will look into when i get on next.) That should help…

5

Yeah, making this change will help a tad-bit. Your grip seems very good for Mulsanne, yet, you probably need a little bit more of grip for the Ring and LS. So, you can look at diff size tires, larger rims, or maybe even race compound (though try the others first so you can maintain enough power). Another potential swap could be the cage.

Tune - some ideas. Lower springs 570/860, more neg camber, 0/0 toe or 0/-0.1, decrease bumps 3-4 range, arbs look in range. With mid-engine, if you apply some of these changes it might require revisiting the diff.

Anyway, once I get to my XBone, I’ll check your build/tune out and provide my 2 cents.

Hope this helps! Good luck.

PRKid

6

Did you by any chance considered Sport weight reduction? This car is pretty heavy!

7

Made a quick build and tune and the car is planted into & exit corners, yet, may not be as fast. You would have to play around with it, yet, some of the tune settings recommendations above do the job…especially the springs and damping. You could also have a potential diff issue upon power-on with your settings/build.

8

Personnaly I don’t run caster that high.
Otherwise I would need to try it.

9

Good point Drows…I missed that one. My quick build/tune check is actually set at 5 and feels just fine.

10

OK, I got another build (very similar to your) yet 10lbs less (4073 lbs) and better grip.

Get rid of the flywheel, get the Slayer which look really cool on this car (or similar weight rims), increase rim size to 19"…and that is it. You will end up with 10lbs less. This will also give you better 0-60 and 0-100 times, plus, higher top end (~210mph benchmark).

Best of luck on your quest!

p.s. If you’d like, I can share both setups and you can check which you prefer.

11

NOTE: Though benchmark @ 210mph top speed, actual is 206mph (yet, this is +5mph better than current build and a little more accel). Anyway, that is it for now.

12

The Following has been changed from the previous setup. (indicated by the stat/item being bolded.)

Stats

Speed - 7.5
Handling - 5.7
Acceleration - 8.7
Launch - 9.0
Braking - 6.3

Power - 661 Bhp
Torque - 487 lb-ft
Weight - 4074 Lbs
Front Dist. - 40%
Displacement - 6.5l

Benchmark
0-60 Mph - 3.184s
0-100 Mph -7.506s
Top Speed - 198.0 Mph

60-0 Mph - 99.3 ft
100-0 Mph - 247.9

Lateral G’s @
60 Mph -1.29
120 Mph - 1.38

Build

If it isn’t listed, it hasnt been changed

Conversions
RWD Conversion

Engine
ALL REMOVED

Platform and Handling
Race Springs & Damping
Race Front ARB
Race Rear ARB
Race Chassis Reinforcement & Roll Cage

Drivetrain
Race Driveline
Race Differential

Tyres and Rims
Race Tyre Compound
Avanti AF 118 Rims
Upgraded Front Tyre Width (265/30R19)
Stock Rear Tyre Width (355/30R19)
Upgraded Front rim size (19")
Upgraded Rear rim size (19")

Aero and Appearance
Forza Front Wing
Forza Rear Wing

Tuning

Tyre Pressure
Front - 28.0
Rear - 28.0

Gearing
Final - 4.06

Alignment
Camber Front - -2.6
Camber Rear - -2.6

Toe Front - 0.0
Toe Rear - 0.0

Caster -5.2

Anti-Roll Bars
Front - 21.00
Rear - 14.30

Springs
Front - 570.5 Lb/In
Rear - 860.3 Lb/In

Ride Height
Front - 3.4"
Rear - 3.0"

Damping
Rebound Front - 8.9
Rebound Rear - 10.4

Bump Front - 3.1
Bump Rear - 3.4

Aero
Front - 237 (Max)
Rear - 382 (Max)

Brakes
Balance - 52%
Pressure - 150% (Though this is subjective, dependant on driver)

Differential
Acceleration - 37%
Deceleration - 25%

With the changes made, there is a much slower response to turning into corners, and some understeer, but stability is improved. It can still be more stable, but with the removal of the engine parts, the car feels a tad bit slower. A shift in gearing to favour a more acceleration biased gearbox could resolve this.
Quickly tested, Nurburgring Nordschliefe, standing lap yielded a 7.32.649, which is only 0.358s off a flying PB.

I’m going to have a look at your set up now PRRelaxed. WIll let you know what i think shortly

13

The turn-in and understeer and be easily corrected via tweaks to your Springs distribution (more to front/less to rear) & ARBs. If you want speed, check my last posted build recommendations.

14

Weirdly enough, i just used your suggested tune (Slayer rims, increased size, Add Driveshaft.). After running another Standing lap, it produced a 7.29.1.9, over 3 seconds quicker. Maybe that could be because ive already done a lap? Either way, its done something right.
Thank you for the suggestions. Now just to look at which of the 2 alterations fits the bill better

15

Great, glad it helped you out! Do not recall adding Driveshaft. Weight at 4073?

16

It was from an even earlier post, where you quoted me saying i should add it. The weight does come to 4073 lbs

17

OK, I’ll post my last complete build in a little bit, jic I missed something better for you.

18

Here is the build…

A700
Conversion = RWD
Engine = RACE (Intake, Valves, and, Pistons), SPORT manifold
Platform & Handling = ALL RACE, except, STOCK Weight Reduction
Drivetrain = RACE Differential
Tires & Rims = SPORT Compound, widest tires for F & R (275/25R19, 355/25R19), RIMs (upgrade from 18 to 19", Slayer or same weight)
Aero = FORZA (F & R) adj

If not mentioned…it is STOCK.

7.6/5.5/8.8/9.1/6.1, 703hp/518lb-ft, 4073lbs (40%), 6.5L, 0-60 = 3.134sec / 0-100 = 7.064sec, Top Speed = 210.1mph (benchmark, for Mulsanne ~206/207mph)

19

Hey CatMan,

Sorry for not replying bud, I’ve been mega busy at work. The only thing I have really done differently is put a little negative toe on the rear, marginal amounts. I’ve also got my Accel differential at around 15%

20

+1

(CatMan…maybe -0.1 rear toe will work for you.)

By the way, when I tested the setup I used an accel of 10% and decel at 40%. Check what you would prefer so off/on-throttle does not give you any spinning/sliding trouble.