Hi there, new to gt sport but not to the gt series. The following is to be taken with a grain of salt, and before you knock the methods I explain below, please give them a whirl. I use a g29 wheel, so let that be reflected in my ideas. The 1st section is how I baseline a setup, and the 2nd is how I fine tune or tweak a tune. POWERBAND CHOICE Before I elaborate on tuning, id like to focus on things we cant change when choosing a vehicle with respect to BOP or class restrictions. In gt6, we had the ability to fine hp/tq/and respective curve shapes, and this allowed for optimization of average power across a powerband. It is now gone, replaced with a simplistic slider. Ill give 1 rule here that is generic but so far works. An engine that needs to be restricted below stock hp levels will be faster than an engine that needs to exceed stock levels to meet BOP. I think that power to weight is a calculation based on peak HP, not average, in gt sport and as it was in gt6. When we restrict a powerband below stock levels, the hp curve flattens at peak. This in a restricted setting provides a broader average power window than if the hp curve was a peak per same power to weight. This is also an advantage when tuning gears which I will attack later. SPRINGS I tend to run softer values proportional to weight bias front to back as close as possable to start. Somewhere below the mid point of the slider. RIDE HEIGHT I tend to start low, halfway between the bottom and middle of the slider. I IGNORE bias on numerical values such as a 458 GR4 (when sliders both equal, numbers are different.) This is due to ride height also controlling overall suspension travel in gt sport. This requires some testing to figure out, but im 90 percent sure it is a remnant of gt6 left over(theres a few) SWAY BARS(ANTI ROLL BARS) Unless you are going over obsene amounts of bumps, more so than nord* I gravitate toward High values, at least 7, often 10. I run sometimes a bias to aid in traction depending on the vehicle. Running less sway in rear helps plant rear for more bite on corner exit, but can lead to understeer after the apex from under utilizing inside front tire on throttle. Less noticeable off throttle. Running less in front can a more loose feel on corner entry, and create more front bite on corner exit, but can under utilize inside rear on corner exit causing inside wheel spin or snap oversteer if grip is aproaching limit. For now set to 10/10 DAMPERS WAY LESS adjustment range from gt6, so this is really for fine tuning. To start, i like the bump as low as possable front and rear, and I set rebound as high as possable front and rear. Ill cover this more in section 2. TOE Front, I VERY rarely adjust toe unless the vehicle has a problem with ackerman geometry.(google it) This a serious PITA to figure out in gt sport without telemetry, and I will 99.999% of the time zero this setting out. I believe it creates more problems than it fixes. Rear, I play with values in or out of around +or- .050 but often no more or less than .015 Set to 0.00 to start. CAMBER This was a touchy subject in gt6. I was a believer in 0 front and rear after a certain update which I cant remember. For gt sport it is a necessary evil which must be adjusted based on track. Set at -1.9 Front -2.3 Rear for a baseline. DIFFERENTIAL Notice nothing so far ive said is dependent on drive type, this changes now. All my numbers are initial torque, accel, then decel. FF- I need help here, as I rarely drive FF, but I tend to run 5,5,5. Explination to follow. FR, MR, RR- I spend 95% of my time driving these layouts, start 5,15,5. AWD- Front diff baseline 5,5,5, rear diff baseline 5,15,5 DOWNFORCE Front- I use as much as possable unless there is terminal oversteer as a last option. Rear- I start at the highest value. BRAKE BIAS I leave at zero, yet to see any gains +or- in laptimes yet. GEARS This is a tough subject to put into type for me, so ill keep it simple and generic. This isnt the end all be all, but it will get you close. If you are racing from a stop, you have a choice to make. Optimise first gear for launch, or optimise first gear for the slowest corner on track. Setting up for launch is to place first gear on the borderline of blowing out the tires on green, but to the point where they dont spin. Setup for corners, place first gear so your RPM through the slowest corner is at or below the start of peak HP by about 500 RPM. Your top gear should be set 6-9 MPH above the fastest speed on track you hit to account for draft. You should account for powerband, so the engine falls on its face, you may have to lenghten the gear not to lose speed. Adjust your gears 2 to below top to have even spacing at the top of your graph below redline. I find this to be fastest. Section 2 will come tomorrow. How did I do?