New Open Source Tune: Lamborghini Huracan RWD (S800 Balanced)

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Hi everyone,

I’ve been learning a lot from the Forza tuning community here and have been having fun! There are lots of great people here and I really appreciate all the effort you guys put into tuning these fine (virtual) race cars!

In that spirit, here’s my first released open source tune of a RWD Lamborghini Huracan (S800 Balanced). I love Lambos, but I like driving RWD cars.

So, here’s what I came up with! I just set PBs tonight at Silverstone and the new VIR circuit. It feels really pretty good to me.

Here it is:

Lamborghini Huracan 2014 Class S800 Build (Balanced)

PARTS: (All stock unless noted)

Conversion: RWD
Wings: F/R Forza/Forza
Tires: Sport Compound
Width F/R: full/full
Wheels: 5Zigen GN+ (or any of similar weight)
Max rear wheel size.

Diff: Race
Brakes: Race
Susp: Race
ARB: F/R Race
Weight: Street

Exhaust: Race

Modified tune changes in yellow

TUNE:
Tires: F/R 28/28

Transmission: FD: 4.25

Camber: F/R -3.5/-2.5
Toe: F/R 0/0
Caster: Angle 5.5

Roll Bars: F/R 10.02/25.06

Springs: F/R 520.1/700.5

Ride Height: F/R 3.7/4.1

Rebound: F/R 8.5/8.8
Bump: F/R 1.9/2.1

Aero: F/R 114/434

Brakes: Balance/Force 48/100 → Or your preference

Differential: RWD Accel/Decel: 35/35

Build it and try it. Let me know what you think!

Thanks,
Matt

1 Like
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I gave this a try last night.

Firstly check the build as I couldn’t max it to 800 as written. Obviously with the RWD swap, all the parts listed above I was short by about 5 pi. I added an extra bit of width on the front wheels and also changed the rims again.

I tried out the tune on Brands Hatch as that should have been a good match.
The car felt very safe and smooth, extremely well balanced. Here comes the but, but it didn’t let me drive it as hard as I wanted. For example I couldn’t get on the power early enough and when I tried it wouldn’t rotate well.

My suggestions

  • Let out the diff a bit more.
  • Soften the springs some to help on the kerbs.
  • Tighten the gears to give a bit more pull.

Hope this helps.

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Just a quick tip for balancing out car stiffness: take the car to Yas Marina North day, run 10 laps and note the fastest time. Also you will notice if the car slides or is generally too stiff esp. in the chicane and the hairpin.

Then try softening springs, arbs and dampers, I suggest start softening the springs first by 50 decrements and lap again to see if you can improve the time and the cars feels better. Repeat until the cars becomes too sluggish and your lap time increases. Same process with ARBs and dampers. You may need to go back and forth between springs, arbs and dampers but a first pass will already improve your time.

That is my preferred method for setting up the stiffness. You will be suprised how much you can gain out of the car with the right stiffness.

Fifty

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Hey sk15kev,

Thanks for trying my tune out! You made very good points. I did try to get it balanced, but you’re right. It probably isn’t loose enough! I’ll trying the diff and spring changes you mentioned.

I really appreciate your constructive criticism.

Matt

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Hi fifty inch,

Great ideas! I will try your approach to softening the suspension up. It makes great sense!

Thanks a lot for giving my tune a try. I’ll see what I can come up with. :slight_smile:

Matt

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Hi sk15kev and fifty inch,

Well, I really gave this car and tune a thrashing! (See my tune changes in my initial post in yellow.)

So fifty inch, I took your advice and used Yas Marina North for tuning. I now know it like the back of my hand! (Wait, what is THAT doing there… :slight_smile: ) The first night, I spent a lot of time lapping and trying to soften the springs, ARBs, and I couldn’t seem to get any faster!!! So…I quit for a couple of days. Ha!

BUT…then I came back to it. I started again, and came to the conclusion that the ARBs really weren’t right to begin with. I softened the front to get better rotation in the corners, and added a little in the back for traction on the power. Now it started getting better!

So now, sk15kev, I started working on your ideas. I then softened the front and rear springs. Now things were really getting better and more consistent. The bumps are smoother. I maxed out the rear aero, then added more Diff accel. Better still! The final touch was upping the final drive to 4.25 from 4.10 to get more acceleration and response. So I think I hit all your points some, and I really like the tune much better now.

Then I took it to Rivals and did Yas Marina North. As of today, I am #270 in the Americas, which is pretty good for me!

I have really learned a lot in the process. Consistent lap times don’t lie! Thanks again for your advice, and if you get a chance, try this tune again and let me know if I’m on the right track!

BTW, sk15kev, I did check the build. I left out the RWD conversion in my build, so I added it into the initial post. But I then rebuilt it from scratch and it still worked out to S800 for me. I don’t know what happened…???

Thanks again, guys!

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Hi Death,

I’m glad my tip helped you to gain some speed on your car.

Two things I notice from just looking at your tune settings:

  1. Your bump seems relatively low, try upping it and reduce the rebound for the same amount, I have good experience in the range of 4 but have to admit I didn’t tune S class yet so lower values might work here.

  2. Your accel in relation to decel seems too low (should be usually around 2:1) probably because the rear is too stiff.

Which brings me to the general RWD setup. In your setup the rear is stiffer as the front. I assume you did it because of weight distribution which seem logical on the first glance. However two factors here that counteract this: dynamic weight distribution when braking and getting the power down to the road. The first one means when you brake more weight is transferred to the front so you need more springs in relation to rear to support that. Secondly to get the power of RWD cars on the road generally a softer rear helps especially for high powered cars.

So usually I setup the RWD cars like that: springs front > rear, ARBs according to weight distribution (e.g. for 53% rear arb = front arb - 2), rebound/bump front > rear (pretty much default distribution). Diff accel/decel relation 2:1 (pretty much default values)

I know this comes probably down to tuning style and personal preference and would change the tune completely upside down. But from my point of view this way is the fastest and most consistent RWD setup.

Fifty

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Hi fifty inch,

Man, you’ve given me a lot to think about and try. I like it! You give good reasoning as to what settings you change and why. That is exactly what I am looking for. I will give these a shot when I get the time and see where it leads me. And as far as style…“I don’t have no stinkin’ style…yet!!” LOL! :slight_smile:

Thanks again!

And BTW: DEATHbySnowman1 is my son’s “handle”…He’s the expert shooter/Minecrafter/SW Battlefront type of kid. He’s also really good at Rocket League, which I have yet to try. He basically beats on me at every game…OTHER than Forza! :slight_smile: If it were up to me, the name would be less DEATH-y and more racy…but that’s me! :slight_smile:

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Hey Death (hope you don’t mind if I continue to call you like that),

since I have no access to my xbox for the next three days I want to run a little test and try to guesstimate tune settings for your car just based on car stats (I’m in process of setting up a tuning calculator). If you don’t mind then please provide me the following numbers:

  • weight
  • weight distribution
  • tire compound
  • exact tire spec front and rear (example 265/30R20, you can see the numbers when choosing tire width)
  • what kind of rollcage if any you use
  • aero front and rear lbs

I then will try to come up with suggested settings based on the tuning style I use for RWD cars.

Could be an interesting excersise!

Fifty

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Hey fifty inch,

Sure, Death is fine by me! :wink:

As far as the car stats go, sounds interesting! Here they are:

  • weight → 2,811
  • weight distribution → 42% Front
  • tire compound → Sport
  • exact tire spec front and rear (example 265/30R20, you can see the numbers when choosing tire width) F: 275/25R20 R: 345/25R21
  • what kind of rollcage if any you use → No cage
  • aero front and rear lbs → F/R: 114/434

Looking forward to seeing what you come up with!

Death

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Your theory sounds fine ie why spring stiffness or softness is needed at each end… but … if the weight moves in the car ie between a front and rear engine then the amount of stiffness needed at each end does shift…but maybe not by as much as the total % weight shift.

So if you have say 600/550 for a front engine RWD then you may want say 580/570 for mid engine and may 570/580 for rear engine (note figures are hypothetical and should not be taken as good figures to use).

These changes are simply for starting points. Via testing you may end up with something different anyway but I believe there is some shift due to the weight. How much is the question.

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On the topic of bump and rebound most recent Forza games have been happy with low bump and high rebound. I believe this is still somewhat the case in FM6 but maybe not the same extremes as before.

So the old 13/13 and 1/1 might be replaced with 11/11 and 2.5/2.5.

Once again this is just starting point figures and sometimes a complete swap of bump and rebound produces good results.

What I am trying to say is its not always possible to say figure x or why is too high or too low without getting on the road but there are some figures that have historically done well in Forza games.

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Love Lamborghini, i was thinking of tuning this puppy but will try yours out first, thanks for sharing…

W4RLOCK38

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Hey W4RLOCK38,

It is my pleasure. I hope you get some use out of it. It isn’t perfect yet, but it is getting better. If you come up with any tweaks that make it more to your liking, let me know!

I love Lambos too. I recently had a (real world) autocross drive in a Gallardo Spyder. (The best Christmas present I’ve gotten since I was a kid!) Man, that V10 sounds AWESOME in real life! And those cars have handling that makes them feel like gigantic go-karts! They’re a totally different experience from driving any “normal” car. :slight_smile:

BTW: I’ve built and tried your A class Viper as well as your 2013 S class Viper…very nice! You’re on my follow list! :slight_smile:

1 Like
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Soo much theory from everyone!

I gave your updated tune a try and you have picked up exactly what I suggested and it is now more compliant over bumps and I feel in control of how it turns. I really like this car now and the times are a lot quicker.
I made a few little tweaks for my own preference, up front ride by 1 notch and took the bump up front and rear four notches.

I realise everyone has their own style and the beauty of being able to work out how to tune is you can tweak it your way. Really glad that I was able to help a little.

Going back to other points, changing build etc depends on what you want to do with the car. If you are lobbying or doing career then the build is good as it is. If you are looking to do some hotlapping then you might be able to optimise it a bit more.

Keep up the good work.

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Thanks a lot, sk15kev! I appreciate you giving it a try and validating my changes. I definitely am able to set some pretty good times with it. I also agree, this is more of a general “balanced” tune. It probably won’t get the fastest laps, but is probably a good pick for many tracks.

Regards!

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HI Death,

so these are the numbers I calculated for your car:

Tires: 28.5/28.5
Springs 518.3/659.5
Camber: -1.7/-1.2
Toe: 0.0/0.0
Caster: 5.0
ARBs: 16.02/21.36
Rebound: 8.2/7.9
Bump: 4.5/4.3
Diff: 70%/35%
Ride height: 3.5/3.9 (minimum)
Brake Pressure: 125%
Aero: 108/434

One caveat though: this is the first RR car with extreme rear weight bias I put on the calc, so I’m really not sure if the values make sense (I tuned only FR cars before). So really take this with a grain of salt.

Let me know how it feels, also I have no real calculation for the diff. If you get too much throttle oversteer then reduce the accel accordingly.

Fifty

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Hi fifty,

Okay, I’ll give it a shot. I’ll let you know how it goes.

Thanks for taking the time to do this.

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Hey DEATH, i have test drove your car, nice LOBBY car… made a couple of changes here and there for my driving stile, the only thing and i mean thre only thing that kind of turn me off was the drive train swap but can live with it. I will be taking it to hot lap some and see what it can do…
Overall nice job, keep it up!!!

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Hey, W4RLOCK38. That is great! I hope you do well!

About the drive train swap, I understand. But you know, Lamborghini DOES sell a RWD version! :slight_smile: (I actually drove a RWD Gallardo Spider just recently. Freaking amazing, Man! And that V10 sound… AWESOME!)

I’ll look forward to your findings. Thanks!