Porsche 911 spring (de-)compression

Hey Henny no problem, my reply wasn’t directed at you but to unfairlane.

But let’s get back on the track so to say - looking forward when you testing out the QuickTune settings, which BTW mimic how i would tune by “hand”, it’s just a shortcut that saves me time.

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Hey fifty, I’m finding that your tunes work well out the box, but after a lot of experimentation with the high end 911s (GT2/GT3) I’ve found 2 things I like to change:

  1. If I raise decel diff to 58 (ie use 68/58) it brings a bit more control on turn in which is most noticeable on tracks with very fast corner entries, some which require no braking ie Prague Full. It seems to give a little less rotation off throttle and - for me anyway - that seems about right.

  2. Reduce Rear ARB to about half the front ARB - this gives a little more rear grip and ensures front is stiffer in roll than rear - which seems to be a race car setup mantra.

Would be interested to know if you see same effects. Always looking for that last 0.5 sec…

Me too :slight_smile:

I’ll test out the changes. But from just reading your proposed changes raising decel while at the same time reducing rear ARB I would suspect too much understeer esp. in slow corners.

One crucial thing is aero in the setup. Are you using the auto-aero settings?

EDIT: Never mind, you were probably talking about the setup I posted.

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I’m sorry, I’m not talking about the Leichbau, I dont have one. This is a more general comment on diff and ARB tuning for 911s, most applicable to the GT3 RS (3 of them).

You didn’t give diff settings - thats my goto setting for twitchy rear ends. Anyway, no Leichbau for me as its DLC.

Could you share some other 911 tunes (GT3RS, GT2RS) etc? I searched for ‘unfairlane64’ on multiple cars and nada. I have been sharing almost all mine.

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@unfairlane64: First of all: I am very sorry I forgot to tell you, but I´ve tested your setup and it is really great!

I mean, good and balanced setups, like there are a lot out there, are WAY better than the standard one.
You can really enjoy them, but there are always still some moments where the car wants you to realise how special it is…

And with your setup even this is gone!
I don´t want to compare it with a very forgiving and balanced real wheel drive car, I know I am driving a rear engined, real wheel drive Porsche, but after every corner I think “Wait… did I just drive that corner without catching the car afterwards?”.

I am a beginner in tuning, in fact a beginner to the whole Forza Motorsport series, so this is probably not very important for anyone who does this for a long time; but this is what I expected of tuning in the game!

I am once again surprised by the diversity of this game, I mean NO calculator out there will ever recommend values for dampers and ARB´s like you did…

Even without a tuning-calculator you will think “naah, a maxed out value can´t be right” :smiley:

But it workes great…

So once again, I appreciate the time you put into this, and I am very sorry to just forget to answer to you.

I know and hate the type of people who asks for help in a forum, gets a good answer and never replies to that, so I really feel bad for forgetting this :smiley:

Greetings

So I just took the Leichtbau Porsche in its completely stock build for one lap on the Nordschleife and two laps on Spa.

And it feels great! I heard the earlier described noise two times in the ring, but never as a result of heavy accelerating, only when driving fast over a hilltop (probably not the correct word :smiley: ) but this never affected my control of the car.

Did a clean 7:56 minutes and on Spa the car was amazing to drive, did a clean 2:44 minutes.

Over the next few days I will try to create a balanced tune based on your help here.

Cheers :slight_smile:

Flugplatz? Adenauer Forst?

I test drove stock 1995 911 (not the same car but similar in power, weight, and year) and it handled horribly in everyway possible. Only setting I could change on the stock car was ARB which was set way too low (less than 10, both front & rear). Once I increased ARB to about 25/35 the car was at least decently driveable. This car could seriously use more damping all around and stiffer rear. I suppose there is a very good reason this car has a dedicated body kit to add downforce.

My test track (before attempting a Nordschleife run) is the Test Track. If the spring rate is not correctly set-up for the car, you find out on the start of the 2nd lap. Stock 1995 911 had it’s nose lifted so high I was looking up at the sky.

Glad to hear your problem has been addressed . . .

It bumped at the Flugplatz and twice in the section Pflanzgarten (between km 17 and 18, the old names for the two “jumps” are “Kleiner Sprunghügel” und “großer Sprunghügel” ) but again, this had no effect on handling, but I will try to get rid of that, too =)

I agree with you about the other Porsche (1995)… Just drove it on the Ring… for about 17 seconds until I quit :smiley:

Completely stock, in upgrades and tuning, but it drives like a shopping cart with off road suspension…

There must be something wrong…
Even if it would drive perfectly on smooth tracks it wouldn´t be accurate to its real life counterpart…

The germans love their Nürburgring, doesn´t matter if it is 1950, 1995 or 2018, every german car gets tortured at the ring, and this monstrosity simply can´t stay on track for nearly 21 kilometers so there is clearly something wrong with the data used when programming this car ^^

But the Leichtbau-Porsche was really good when completely stock, soft suspension, but really good handling and great fun to drive.

i love the new drag race mode thanks turn 10

All agreed. Hence my initial disclaimer about car model (not 3D model, but handling model) being correct. I also love Nürburgring ever since it first appeared in Grand Prix Legends 20 years ago (can drive the whole track in my head). My personal preference is the old layout where the start of the track had left hander followed by a 180 deg hairpin.

When you say ‘bumped’, I am again guessing that it was at the landing. Do you remember if it was the front or the rear that bumped? Either way the spring rate + ride height should be adjusted . . . at least for the sake of completing cause & effect loop.

You can quickly test/fix the ‘bump’ issue at the Test Track. The launch ramp will show you whether the spring rates are balanced or not. If the car does NOT land on all 4 wheels then increase/decrease one end until the car does. Then both front/rear can be increased/decreased to the stiffness of your liking. If the car bounces uncontrollably after landing, overall dampening is too low. Ideally I shoot for 4 wheel touchdown then be able to enter the high speed right hand corner immediately. Then I take it to Nordschleife and it behaves well. Seems to work for FF cars at least.

This is diffucult for me to say exactly when I hear this noise. I will save a replay of the lap to watch it in slow motion, otherwise its too fast to see, if it occurs while the car is in the air or if the noice happens when it hits the track again…

And I know, the words “noise” or “bump” are not very precise, but I never heard the sound elsewhere…

Hate this noise because I always heard it when I took my first Porsche in the game for a test run, and it did this nose lift thing all the time…

You saw the front of the car building up, then you heard the noise and the car came down again… resulting in a crash… So I was pretty disappointed with the Porsche performance in the game and did not drive one for months :smiley:

Great idea to test and tune the suspension on the test track, thanks for that!

I understand your love for the track.

If everything goes well, a friend and I will drive in an amateur racing league, nothing expensive, nothing fast, the goal in this league is not to get the fastest time, but to be able to get the time you set in the first round (after warmup) over and over again.

The closer every lap time is to your base time, the better you get ranked.

Some people that this has nothing to do with racing and that it is a waste of time (track is closed for public while those league races)…

But for me it´s all about the experience, to drive this legendary track and to do it without crashing…
It is also way more safe to drive in a series like this than to drive when the track is open for publice (hence everyone -.- )…

Everyone knows the fail-videos and even if you don´t do anything wrong, maybe there is a 18 year old boy with a fast car and a small brain… :smiley:

Not to mention driving on a track in RL is completely different than in FM. The view through your own eyes are so different. Driving on Watkins Glen was pretty scary (the downhill left hander). Nordschleife would be a daunting track to drive at high speed, because you can actually get up to very high speeds. Good luck in your league (envy).

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Ohhh please don´t get me wrong, I do have a huge amount of respect… Not just for the track, or any other racetrack, but also for driving itself, even on roads.

Had some close calls on public roads, some of them were my fault, some other´s fault…

Had my license with 18 years old, a turbocharged car (nothing crazy) and a derestricted Autobahn :smiley:

Anyway, I would never call myself a good driver, I once got told that if you think you are, there will be a day where you will see how wrong your thinking was ^^

And like I said, it is not about good laptimes, you can drive the whole Nordschleife with 50 km/h if you want ^^

Watkins Glen is one of my favourite tracks ingame, too…
Looks easy from the layout but it is not the easiest track IMO ^^

Just to emphasize what I mean:

I did just finished two laps of th Nürburgring Nordschleife with unfairlane64´s setup.

And I noticed two things I want to mention.

1: I got a new best time. I was more that 3 seconds faster ( I am now at 7:35,347 )
2: I never had more fun trying to get a fast and clean time in the first couple of laps.

Two more things to say:

First: I will never upload this tune as my own! For me this is a great example of what you can be able to do if you are really investing time into the process of improving a car within the limits of it´s class.

This is exactly what I want to learn!

Second: I really hope you visit Germany some day, because if you do and if you like german beer, I would like to buy you one at the restaurant called “Devil´s Diner” which is directly located at the Ring :smiley: :smiley:

Greetings =)

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@Gryphon: just checked your suggestions on Laguna Seca and it drives suprsisingly well consideing the quite drastic changes to diff and ARBs. However I was not quite able to match my times compared to the QT settings: after 11 lasp 1…33.8 after 13 laps 1.33.6.

Most notable disadvantage was on the left sweeper after the corkscrew, I could not maintain the speed through the turn as with QT settings. Other than that it drove really well.

Oh heck… Laguna Seca… the track I love to hate. Well, I realised I better spend some quality time getting to know it better, as I have never tested any tune on it. (My goto tracks are Watkins Alt Short, Suzuka, then Nordschliefe). So I gave it a go last night and was running 1:35s in the 2016 GT3 RS which isnt too bad I suppose as I dont know the track. Issues I noticed with the tighter decel diff and softer rear ARB were:

  1. Turn in was too sudden - I was having to correct corner entry almost every corner
  2. Had a bit of tailwag on setup for corkscrew

Was getting excellent rotation on turn one, but other than that I dont think the track lends itself to a real workout of the decel diff. Perhaps we could strategize on which tracks/corners are the definitive decel diff test? One that has always bit me in all the 911s is the final kink right at bottom of hill leading to finish line on Maple Full - real hard to keep a 911 under control if you lift there…

not all the vehicles require a big change in tuning numbers but there are those that really need a big change!

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Sorry for the delayed answer.

I will keep it short ^^

The QuickTune settings feel different for me compared to unfairlane´s settings.
That does not mean better or worse, in my opinion both settings are very good, maybe even so good that you can only improve them by adjusting them to your own driving style.

But I will be honest with you: I am not experienced enough to point out what I don´t like or what I would improve on each setup.

I am not even sure how I could get the feeling for recognizing what tiny changes (for example) in the dampers or springs would be appropriate to improve the settings and my laptime.

Maybe it is just the amount of experience with the same car, track and setup, maybe it is experience in tuning…

But for now I am very happy with what I got from you guys! =)

Greetings