Another Quick Tune Formula

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Tires F/R: 29.0 / 28.5
Final Drive: Dink with this if you can or want and find the fastest 0-100 time. I could give a bunch of math, but we are in a hurry tune.
Camber -2.5 / -2.5
Toe: 0.0 / 0,0
Caster: 5.5
Anti-roll bars: 40 * ( 1 - 0.62 ) = F 15.2 / R 15.2
Springs: Find the upper spring rate, 100% stiff. For example if it is 1218 then: 1218 * 0.62 = F 755 / R 755
Right Height: Bump up the height to 4 clicks. If the car is uneven, even it out as close to 0.4 clicks high.
Rebound:
RWD: 8.1 / 8.0
FWD or AWD: 8.0 / 8.1
Bump:
RWD: 4.1 / 4.0
FWD or AWD: 4.0 / 4.1
Aero: Full if you got it and want to stick to the road. Full front and no Rear if you like to drift.
Brake 48%: Pressure: Whatever you want
Differential:
RWD: 25 / 10
FWD: 80 / 20
AWD: 40/ 0 / 80 / 20 / 60

Hope this works out for you.

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Had a play with this on my X class Agera. Found it to be a really good base tune to start on. Couple of minor tweeks and i have a nice driving but still insane Agera! Nice one!

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I’m super happy it was a good starter for you!

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Since I got my Thrustmaster TX, I really feel even little tuning differences especially in camber, rollbars, bumpers and springs. High negative camber in the rear is not good, was one of my first experiences. The cars seems to have less grip while accelerating (the force feedback is weaker) and loose traction in turns. I watched quit a few awesome drivers in Forza 5 with the best laps in the rivals menue and they are normally using much less negative camber in the back compare to the front or didn’t tweak the front camber either. I would say -0.5 to -1 is the best and in the front it depends on the car and personal preferences. -2.5 is okay most times.

With the understeering issue due to the gamepad i would first tweak the advanced control-settings and change the steering values to 0-100. At least increase the difference and step by step getting used to 0-100.

But steering wheel and gamepad is so different, I really had to change every tune, especially in Forza 5, but also many in Horizon 2. I don’t understand, why there’s no special tuning board for wheel drivers. With gamepad I had understeering-problems, with the wheel it’s the opposite. If negative camber in the rear helps to get better cornering, use it. But there’s a penalty for that, I far as I can tell.

PS: I read, that a toe of +0.1/-0.1 is better. I can’t feel that, but it’s working.

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I think it is dangerous to make such wide ranging statements.

The right camber for a given tune may differ based on other settings in the tune but it may also depend on various other factors and the car itself.

Some awesome tuners in FM5 found that the game’s sweet point for camber was a lot higher than in previous games and statements such as "If you aren’t using more than -2.0 at both ends you are doing it wrong were made.

Now yes I am sure we can find some quick times running low rear camber but I am also confident we can find quick times running more rear camber than that.

In Horizon 2 I think most people’s initial thoughts were a little less camber than FM5 seemed to work but I am also aware of #1 times being set with a lot more rear camber than -0.5 or -1.0.

In short use what works for you but I will stick with higher rear camber than -1.0. My lowest from memory in FH2 is -1.9 on the rear on my Escort RS1800 which is currently the highest ranked non “beast” car at Abbey Cross Country in monthly rivals.

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Great tips! Thanks for sharing. I need to get a wheel someday.

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Can you elaborate on ARB settings?

“Anti-roll bars: 40 * ( 1 - 0.62 ) = F 15.2 / R 15.2”

Does this mean that, regardless of car or set-up, the ARBs are ALWAYS set to 15.2 / 15.2?

Where did you get the value “40” from? And 0.62?

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8

Yes.
ARB values go from 1.0 to 40.0.
I found out through lots of data analysis that the upper spring rate is always set to 42% of the cars weight. I added in an extra 20% or so to handle Acceleration, Brake, Corner (Lateral) weight transfer. So that sets the springs at 62% or so. You can download my spreadsheet on one of my open source tune. I have a tab for dampers, springs, ect, and shows all the math.
Since I’m telling people to always have their springs at 62% of upper spring weight, I need to use the ARBs to balance the oversteer and understeer so that I give them a balanced tune.
I soften the ARBs by the inverse of how I stiffened the springs, (1 - 0.62 ) = 38%, 38% of max ARB setting 40 is 15.2. Max ARB setting never changes from car to car. This soft ARB and stiffer spring is balanced now. You have a happy car.
Again remember this is just a quick little tune and can be modified to your liking. But it is based on lots of number crunching from FM5 and H2.
I hope this helps answer your questions.
Good Luck,
Meow

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9

Great job with setting up a quick base tune. It makes a stable car to start with. I find the spring rate to be pretty low but as I said it’s a good starting point. Thanks for posting. I’m always looking for new tune ideas.

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Thanks!

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You guys may also want to try this tune calculator. It allows various performance settings and works pretty well also.

http://simcartuning.com/?weightInput=2512&percentFrontInput=43&maxFrontAeroInput=100&maxRearAeroInput=200&chosenRollbarInput=15&semiRaceSId=1&stiffDId=1&rwdId=1

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12

Thanks for the info. I have a few more questions and was hoping we could chat via live when u have some time. Thanks .i will add u to my friends on Xbox 1

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Just to clarify that 40 *(20-1) means I take 20-1 then multiple it by 40

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It is 40 * ( 1 - 0.62 ).
Or 40 * 0.38
Or just set them to 15.2, they won’t change from car to car because the ARB range does not change.

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I love this method. Normally, I can troubleshoot problems and get a new car doing what I want but sometimes I come across a car that just won’t cooperate. This tuning method has come through on a few cars I was ready to abandon.

I just wanted to thank you for gathering and sharing all this information too. I’ve learned a lot from it as I’m sure others have. Thank you.

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Shouldn’t it be:

(40.00-1.00)*0.38+1.00 = 15.8

and with your example of a max spring rate of 1,218 (min will be 152):

(1,218-152)*0.62+152 = 813

I don’t notice any difference when I use one or the other, just curious if the tune will be affected. This has more of an effect on heavy cars since the range from 0 lbs to the lower spring rate is based on the weight of the car.

I’m sure you are aware of this already but excluded it because this is supposed to be a quick tune - not math homework. I just thought people might find it useful.

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The ARB math is fine since 0 is not a valid value for an ARB. You still have 40 whole numbers to choose from in the set. [1…40]. At first glance I thought 39 as well, but after borrowing some toes it came out 40.

Correct on the weight, it was excluded as to not make it math heavy.
Lower Spring Rate should be excluded from the weight before doing the percent calculation. ( LSR is usually 0.0518 of the Car Weight )

Thanks for the kind words Tardii. Hearing them from someone of your caliber really puts a smile on my face.

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I like reading your posts Kitty. You always put a lot of though and math into your tunes and they work out fairly well.

I’m actually thinking of putting all of your quick tunes into a single memo easy access on my phone while playing. I’d make it into an app but don’t know how :stuck_out_tongue:
Would you mind me doing some editing of all your quick tune threads and putting them into one document to share?

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I have them in my first post of my main tune thread in this forum.
I am working on a site to help people through the tuning process, and much much more.
Feel free to take any of my work, just put credit in where appropriate.
I’m happy to help the community here and everywhere.
Thanks for like my stuff :slight_smile:

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