Finally got back to this terrific game after months away playing some other stuff, especially Horizon 4.
I’ve been tuning a lot of the new cars that I never got a chance to and I’ve noticed fairly consistently that sport tires give shorter braking distances than race tires for both 60-0 and 100-0 simulation. Yet when you switch to race tires from sport tires the breaking statistic will often go up two or even three tenths, and the PI will go up by five or six points. So why does the game think that the braking is better with race tires, and affect the PI score upwards, yet the simulated 60-0 and 100-0 show the opposite?
If you’re interested in a car to check this on quickly, try the 2019 Porsche 911 GT3 RS. The race tires go from 6.6 in my configuration to sport of 6.4. However the distances go from 117ft (60-0) for sport tires to 124ft (60-0) with race tires. The 100-0 goes from 280 on sport to 285 on race. Shouldn’t these numbers correlate instead of going opposite directions? Am I missing something? Or is the simulated number not really accurate? In which case, why in the hell do they even include it?
It resets your tyre pressures to 30psi when you change them. Also the optimum pressure changes. It’s like with every component with variable settings, it has a default setting which usually completely wrong.
Thanks Brisbane this makes some sense. However the discrepancy shouldn’t be that large I would think. And optimal pressure on tires typically is, at the most, one pound difference depending on car weight and suspension. Since we’re talking with the exact same car with everything else identical that tire pressure likely won’t change it all possibly a half a pound. I don’t think that difference is entirely what’s making this happen, although that would seem to be part of it.
So what you’re basically saying is that decimal number that we are given for each of the braking, acceleration etc. is the maximum capability that car could do with that component attached if we tuned it perfectly? That would seem to make sense, but also seem to be very challenging for them to come up with a number. I think it’s a default number thrown at the wall based on: “these tires should be better, so here you go”. Then the simulator actually runs based on the numbers you have in your tuning.
Here’s another very curious example to ponder…
Stats below. For reference most of my tuning is done with the ForzaTune 7 app. And then I tweak from there after driving and testing.
Notes: attempted to match wing downforce as close as possible on both cars. Brake Force pressure was set to 85 - oddly changing this from 100 drops brake distance significantly. In previous tunings I would leave this at 85. However I have found driving with pedals and a wheel leaving it at 100 and modulating my brake works just as well if not better. Makes me wonder if the simulation is based on using a controller where it is harder to regulate braking and lockup.
Notes: front and rear brake balance was adjusted for smallest simulated brake distances. Normally I have brake balance close to 50, just a point or two off of that. And I noticed by setting both of them to the mid-forties (towards rear) my braking numbers were reduced significantly. I’ve read where some people say the best thing to do is take the car out, get it going really fast on a straight, hammer the brakes and watch the tires to make sure they all light up orange at the same time that means you have good brake balance. But I know a lot of people prefer to have more in the front, although you can lose some turning ability if the brakes in the front are working too hard. Any ideas on this?
These cars are very nearly identical in tuning setup and weight, including a race tire pressure of 27 PSI front and rear for both cars. Zonda R has 375 on rear & 295 on front. The Roadster has 345 on rear and 265 on front. That was the only way I could give them both race tires and keep them at the same PI.
The Forza 7 stat shows the braking of the Roadster at 7.1 vs 6.8 for the Zonda R. But I cannot get the Roadster anywhere near those braking numbers under simulation. So the stat seems to just be misrepresenting the actual braking ability. Anyone have an idea what’s going on here?
So after bit of tinkering here are the best numbers I could achieve for both cars. As you can tell these cars are nearly identical, yet the game thinks they’re braking is significantly different. Thoughts?
2010 Pagani Zonda R - R899.
Braking stat of 6.8 … brake balance 45%
60-0, 88.9
100-0, 218.3
2009 Pagani Zonda Cinque Roadster - R900
Braking stat of 7.1 … brake balance 44% rear
60-0, 90.3
100-0, 219.7
Those numbers I have found are absolute garbage. So for example if you put a wing on the car, it drops speed and acceleration significantly, but it doesn’t change if you then drop the downforce to a minimum. It might tell you a car has rubbish handling, but this doesn’t ever give a clue as to how the car will actually handle. It says my homologated Chevy El Camino is a 4.1 for handling, but it is lovely to drive and win races. I do my best to ignore those stats and listen to what the car tells me.
i have noticed that if your tires are cold, ie start of a race, you will lock up more easily, same with cold brakes. After a few laps this improves and is quite clever to be honest.
Probably has to do with the patches I’ve seen mention of that changed the tire’s grip. I hope the PI system is correct, and the simulated estimate performance is using the wrong version of either race or sport tires. Horizon 4 has a similar contradiction with the '92 NSX and I think '85? Porsche 911 GT2. The stock tires have lower PI, but more simulated lateral grip than street and sport tires.