How to calculate the performance points

[M3one]

That's the question, does anyone know how GT5 calculate them? I haven't found it in the forums...
Thx

 

[diptob79]

It needs some times but I'm sure some people are doing this.
I remember some japanese (cmiiw) dudes solved the pp calculation for GT5rologue.

 

[M3one]

Maybe an aproximation... The main parameters should be weight and power, but what else?

 

[Schwartz]

I bet it would help if they looked at the caterham seven fireblade. If you upgrade it fully it has only a couple hundred HP but its really light, so the PP is up there with the Le Mans race cars... Of course it would get blown out of the water by the Le Mans cars...

 

[speedkarter13]

Power/weight ratio with aerodynamics added in somewhere, I think. Can't figure out the exact formula, though.

 

[berty1979]

Aero is definatley taken into account with the power/weight ratio but the pp system is still misleading.
I dont think they take drive system or weight distribution into account, like an AWD absorbs power and has a slight disadvantage on the fast straights but gets a better take off.

 

[MSTER232]

That's the question, does anyone know how GT5 calculate them? I haven't found it in the forums...
Thx

My guess is something below:

• PP = Weight x BHP divided by 3
• PP = Weight + BHP divided by 2

 

[Schwartz]

My guess is something below:


[*]PP = Weight x BHP divided by 3
[*]PP = Weight + BHP divided by 2

It cant be because when you lower weight, PP goes up. If your theory was correct than the Bugatti Veyron would have more PP than a Formula GT.

 

[M3one]

Thanks guys, at least we know the 3 factors: Power, Weight and Aero, and, according with Schwartz38, for the same PP, a car with more power is better than a lighter car (for sure this rule is not always true).

 

[MSTER232]

It cant be because when you lower weight, PP goes up. If your theory was correct than the Bugatti Veyron would have more PP than a Formula GT.

True. I'll observe about 10 cars and their PP and I'll take a more accurate guess when I'm done.

 

[oopssorryy]

and, according with Schwartz38, for the same PP, a car with more power is better than a lighter car (for sure this rule is not always true).

.

This more depends on track and driver style. If the cars have the same hp/lbs then they will be nearly equal, weither they have tons of power but are heavy, or light and low powereda. Great example of this is the Lotus Elise. I tune a lot of cars to 450PP and all the cars (the ones without aero) all have nearly identical power to weight values.

 

[MSTER232]

It cant be because when you lower weight, PP goes up. If your theory was correct than the Bugatti Veyron would have more PP than a Formula GT.

EDIT: I thought through the PP formula and while I haven't exactly cracked the code to finding out PP, I figured out it's something along the lines of "PP = BHP divided by (Car's Weight divided by 2) x 1000 - 100 +/- 150 PP. Very close if you ask me .

 

[Nish]

Why is nobody including lb/ft into their calculations as it's known that your torque does play a role with pp?

 

[o9lifted]

Downforce plays a role too

 

[Greisen]

Guess nobody really knows but it should be something like:

Power * (something about the aero example (front-aero*rear aero divided by 20)) + weight.. not sure at all about it but it gotta be something like that.

But then.. the body rigidity also has something to do with it... arh mental breakdown...

 

[o9lifted]

Just give it up then and let PD calculate it for you

 

[Nish]

Also the longevity of said horsepower/torque (curve) could also play a role.
I liked it better on Prologue when they actually had a bar graph to show your cars performance stats.

 

[Mic_Col]

I almost think there might also be an adjustment figure thrown in which represents the handling of the car.

Sort of a ballpark figure that takes in the designed 'sportiness' of the car. Quality of suspension and handling ie: Suspension stiffness in contrast to other cars designed for ride comfort. With factors also considered like tyre width and even the age of the car.

I figure that affects the figures too.

 

[Stratman]

Ok.
So far we have possible combinations of
BHP
Weight
Aero
possibly torque- I doubt because you can increase torque from hi range turbo to mid, though drop HP and pp, seems HP overrides torque factor for pp equation?
possibly drive system FR, FF, AWD
possibly rigidity- before and after a rebuild does pp change? that may prove/disprove this?

No one mentioned yet physical size- height/width/length- I know it sort of fits aero but...

Anyway it all sounds feasible to me. 👍

So why the heck do tires make no difference to performance points when they so clearly make the world of actual performance difference?

 

[TimberW]

Rigidity doesn't as far as I know. I know weight distribution between front and back does effect if it's closer to 50/50 weight distribution.

 

[DDAAVVIIDD82]

Seems to me that tire width should be factored in as well. I think that's where the 'blade really falls short.

 

[Schwartz]

Just give it up then and let PD calculate it for you

Yes but if you figure out the formula, you can optimize a car's performance while keeping the PP low.

 

[Schwartz]

Take a look at upgrades, and compare PP with before and after adding upgrades and record how much it changes with each one and also look at which upgrades actually do effect PP (for example, drivetrain parts dont) and how drastically the effect it. That will tell you what performance factors are involved in the formula.

 

[NABeast]

Does it also factor in what "level" the car is? Along with HP and weight etc.

 

[DDAAVVIIDD82]

Does it also factor in what "level" the car is? Along with HP and weight etc.

I'm sure the base PP helps to determine the level requirement, not the other way around.