Help save the 997 GT3

Hi everyone, hope you’re doing well!

The 997 GT3 needs help! Despite the new physics, it still is an unmitigated messy understeer machine! There is no way a 997 GT3 ever came out of the factory with those suspensions settings. I tried common sense on the many parts that are adjustable from stock, but the behaviour remains the same.

Sure, Forza wings front and back, wide racing slicks can aleviate the issues but I’m talking about the stock car, 100% unmodified. Again, everything bar the gearing, aero and differential is tunable on the base 997 GT3 so there should be enough to make a change.

Help appreciated, not necessarily to create a world beater but at least something that doesn’t feel like an NHRA dragster out of the corners.

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Can you post your current tune settings?

I think understeer is built in to all the cars.
For me i put a wider front tyre on, raise the anti squat and lower front anti roll bar a little, cant remember what else i did of the top of my head but i used the gt3 just the other day.

Can you explain how anti squat exactly works in this game? For example I was told lots of cars have too high anti squat. I lowered rear anti squat of the Jesko from 44.xx stock to 2.4 stock and it SEEMS to grip much better when mashing the gas (unless that’s placebo?). But cars like the 919 have NEGATIVE rear anti squat stock. I’m just confused as to if going all the way up in positive makes a car as stiff as possible, then I’d imagine 0 would make it as “loose” as possible. But then there’s a whole negative number option. What do the negative numbers do?

Negative - more squat

Positive - less squat

I usually run them both as close to 0 as possible and use the spring rate to adjust weight transfer

This is a tough one tbh, keeping it in stock form the rear just has so much more grip than the front. And without enough power to create some slip on the exit it just wants to push through the front tires.

If you are wanting to keep it stock this tune is a HUGE improvement, but I would at the least increase front tire width to help with the on throttle understeer.

But try this, I did get the race diff to try and promote some oversteer with the lock up. You need to be pretty aggressive into the corners and ride the off throttle oversteer through the apex. GL

Tire PSI
Front 31.5
Rear 35

Camber
Front -2.0
Rear -1.5

Toe
Front 0.1
Rear 0.0

Caster
6.0

ARB
Front 34
Rear 40

Springs
Front 426.8lb
Rear 550.3lb

Ride Height
Front 4.1
Rear 4.6

Damping
-Bump
Front 3.9
Rear 4.0
-Rebound
Front 6.5
Rear 6.6

Diff
Accel 100%
Decel 15%

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Thanks a lot! I’ll try that ASAP!

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I wish they have the cars little more drivable by default. To unlock these tuning we need to drive for 30 min in a stock car, some of the them a comfortable but many just painful experience.

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Yea I agree, especially all the alignment stuff. Race suspension should just open up springs and dampeners imo

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So Lowpala’s tune helped a lot, and given the numbers I would have never gone this extreme, especially with the ARB settings. But I did some digging and found something pretty weird/interesting. As we know, 911’s have light front ends and heavy rear ends due to the RR layout, it’s 38% front and 62% rear in weight distribution. If you add maximum ballast though, then put maximum weight reduction, you end up with the insane prospect of a 50/50 weight distribution 997 GT3. Which is crazy.

Is it a 911 any longer? Not really, but it might help it regain some competitiveness overall.

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Glad to hear it helped some. Tunes are hard to share tbh because our driving styles could be completely different! So what may be comfortable for me might be a what the heck is this for you haha.

Ballast is a welcomed addition imo, not only for weight distribution but also squeezing some upgrades into a car that would be over the PI limit without it.

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I drove this car and actually really enjoyed it. Bone stock. I lowered the PSI a few points front and rear (got it to where all the “green” had the overall best accel and decel numbers), and have camber at something like 1.5 front and 0.5-1.0 rear (can’t remember which one but it may be 0.5). Again, I just got the setup with the best “green” improvement numbers.

It’s super fun.

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Thx for your feedback, I’ll check your preferences out as well! :+1: