Database

I) PerfectPower Database

(111 cars as of Sat 09122023)

PerfectPower is in the process of creating its own database, to which you will have to refer to enter the 8 basic data of your Car sheet necessary for power measurements:

- Car weight

- Engine displacement

- Number of cylinders

- Transmission

- Tyres dimension

- Gear ratios

- Final ratio

- Cd.A

This database is accessible via an Excel file which is constantly evolving and available on Google Drive at the link below:

PerfectPower Database (coming soon...)

However, you have to know that there are hundreds of thousands of car models in the world, and a whole life would not be enough to create a complete database (the calculation is easy to do...), so it will limit to the most popular sports cars and those of PerfectPower users (see note 4 below), thanks for everyone's understanding!

Note 1: The PerfectPower database is structured as follows:

- Each car is identified very precisely by its full name (make + model), its power, its type of gearbox (M = Manual or A = Automatic followed by the number of gears), and its years of production (1st year - last year). Plus a fifth optional information: its sales market (EUR = Europe, N-A = North America, AUS = Australia for the most common) when the car is not sold worldwide or when it has different characteristics depending on the region of the globe.

- Each car has not only the 8 basic data necessary for power measurements, but also indicative additional data whose number may increase over time.

Note 2: If your car is not in the PerfectPower database, refer to the most comprehensive automotive database in the world to date, both by the number of cars it contains (hundreds of thousands!), and by the number of technical data for each car:

The Automobile-Catalog

However, this database is not yet completely finished, its designer and his team proceed alphabetically and are currently working on letter S (Seat, Suzuki, etc.), and therefore a certain number of models are missing in the brands starting from letter S (S, T, etc).

Note 3: All cars in the PerfectPower database have a direct link in the Automobile-Catalog (when they are also present there) available in chapitre II below.

Note 4 to PerfectPower users only: If your car is neither in the PerfectPower database nor in that of the Automobile-Catalog, you can contact me by mail from the application (Email contact button located at the very bottom of the Setup screen) by giving me the make, model, and year of your car, and this one will be added to the PerfectPower database within 24 hours following your request.

Note 5: The data from these two databases being those of strictly original cars, you may need to customize them if your car is not completely original (car weight, tyres dimension, etc). Moreover, here are important notes regarding some of these data:

- The car weight given in PerfectPower is the actual weight of the car (when available) weighed with the full tank of fuel on the PerfectPower professional scale (NIST certification +- 0.1%) or on the UTAC scale (French private organization of tests and homologation), while that given in the Automobile-Catalog is the weight announced by the manufacturer (curb weight, which means without occupants or baggages, but with all fluids and in particular the full tank of fuel). Alas, the manufacturer weights are sometimes optimistic (and this in a very variable way according to the manufacturers / models ...), and it can be useful in certain cases to weigh your car on a precision scale, a technical control scale, or to look for its true weight on specialized websites such as those of automotive magazines which often weigh cars on precision scales, and according to the same standard as the manufacturer.

- Remember to take into account the level of fuel present in the car at the time of the measurements! An example: your car is weighed or announced at 1300 kg with the full tank, but you only have half a tank of 60 L ==> you will have to enter 1300 - [(60-30) * 0.75] = 1277.5 kg or 1277 kg rounded (note: calculation with conventional gasoline of average density 0.75).

- The tyres dimension to enter is always that of the drive wheels, and for a four-wheel drive it is always that of the rear tyres (and whether the fit is symmetrical or asymmetrical).

- The number of gear ratios has been deliberately limited to 7 in the application, which covers well over 99% of the cars in circulation on the planet, thank you for your understanding! In any case, the power measurements only having to be performed in 2nd or 3rd gear with a serial car, the setting of all the other gears is only used for the performances simulator, and not setting gears 8 and + on a gearbox with more than 7 gears will make absolutely no difference on the results provided by the simulator, with the only possible exception of the max speed.

- It is possible with PerfectPower not to have to configure the gearbox and final ratios by carrying out a procedure identical in all respects to that systematically used on chassis dynamometers: the rev calibration (guide, chapter IV-6).

- It is also possible with PerfectPower not to have to configure the Cd.A by choosing to use the losses calculation mode by measure in coastdown for power measurements (guide, chapter I). However, this procedure is not specially recommended because of the relative difficulty of implementation on open road, not to mention that it is not possible in any case with an automatic gearbox.

- The Cd.A given in PerfectPower is the actual Cd.A of the car (when available), while that given in the Automobile-Catalog is generally that announced by the manufacturer (marked "claimed") and this one is perfectly reliable, but it is sometimes a value estimated by calculation (marked "estimated by a-c") and in this case the value given, although generally not very far from the actual value, has a certain margin of error.