At what PP would you consider close if trying to Balance a group of cars

[gti_sdn]

I have a group of nine cars that all have the same engine type (N/A V8), similar engine capacity(~5lt), and the same drive train layout(FR), and I am trying to balance their performance.
I know the PP system is not the best thing to go on but what would you consider a close enough match of PP between cars to have them closely matched?
5,10,20PP?

All the cars are the same weight, have similar torque and are all within 4hp.

The other stats are as follows:

Claimed 0-400m(sec): 11.21-11.65
Claimed 0-1000m(sec): 20.35-20.71
Claimed 100-150km/h(sec): 2.63 - 3.09
Claimed Rotational G 60 km/h (G): 1.28-1.31
Claimed Rotational G 120 km/h (G): 1.3-1.32
Claimed Rotational G 240 km/h (G):1.34-1.38

I have a lot of testing to do with them to ensure lap times are close but I need to consider lobby settings and limiting the possibility of people deviating from the spec and making a car overpowered.

 

[Meythia]

This depends on the cars you are trying to match.
As an example of existing ranges (without saying the balance even works at all)
Gr.4 Bop ~ 20
Gr.3 BoP ~ 30
Gr.2 BoP ~ 55
Gr.1 Bop ~ 60

So in the end just try to drive them and have them have very close performance on a track you know very well.
Then ignore PP.

 

[gti_sdn]

Ah didn't think to look at the GR cars and what their pp spread is once BOP is applied 🤦

 

[Niko-H]

I did some informal BoP'ing/matching on my homebuilt JGTC race cars (Diablo GT, R33 and R32 GT-Rs, Porsche 993's, etc). I ended up with about a 20 PP spread (710-730) and the lap times were within 1-1.5 seconds. However, I also had a MUCH wider spread of rotational grip than you have. I suspect you will get pretty decent results with the matching you've done so far, and you'll be able to ignore the PP.