Friday, May 26, 2023


Friday, May 26, 2023, 4.51 pm (Paris time): Release of the Android 6.1.3 version (report in chapter 1)


Promotion: PerfectPower Android at 27 dollars & 27 euros from Saturday, May 27, 2023 to Saturday, June 3, 2023 (regular price: 49 dollars & 49 euros)


I) PerfectPower Androïd

II) PerfectPower iOS

III) Tests

IV) Website

V) Miscellaneous


I) PerfectPower Androïd



Report of version 6.1.3 released on Friday, May 26, 2023 at 4.51 pm (Paris time)

Removal of the Power function lock, the anti-piracy objective having been achieved


Report of version 6.2 which will be released during June 2023

1) Unlocking the "GPS only" measurement mode (power & accelerations & braking measurements), allowing to get rid of constraints of the accelerometer, and therefore allowing:

- to completely free the phone from any mounting requirements (stability, vibration level, positioning)

- to carry out measurements on a road in poor condition, even if this is not recommended from a strict performances point of view, the rolling resistance (and the air resistance to a lesser extent) being seriously increased and variably over time

- to perform power measurements on a rolling start (indeed, the specific calibration phase at standstill is no longer necessary!)

- to no longer have to carry out the difficult specific calibration phase while driving for braking measurements

However, the use of the RaceBox Mini is essential to use this mode, the internal GPS of phones still limited to 1 Hz in 2023 being still far too slow! 

2) Adding a function for duplicating a Car sheet (useful if you often measure the same model of car!)


II) PerfectPower iOS



Report of version 5.0 released on Saturday, May 20, 2023 at 8.39 pm (Paris time)

Upgrade to the level of PerfectPower Android 6.0 on measurement accuracy + minimal but essential adaptations, which includes:

1) All adaptations to iOS 16 (09/2022) + iOS mini changed from 9 (09/2015) to 11 (09/2017)

Validation tests carried out physically on my iPhone 7 running iOS 15.7.5 and in the iOS simulator on iPhone 14 & 14+ & 14 Pro & 14 Pro Max running iOS 16.4 (March 27, 2023)

2) Equalization of the graphic rendering of all screens both horizontally and vertically for ALL iPhones since the 5 (09/2012), the first iPhone to have a 9/16 screen

List of iPhones concerned (classified by type of screen): 5 & 5C & 5S & SE, 6 & 6S & 7 & 8 & SE2 & SE3, 6+ & 6S+ & 7+ & 8+, X & XS & 11 Pro , XR & 11, 12 & 12 Pro & 13 & 13 Pro & 14 & 14 Pro, 11 Pro Max, 12 Pro Max & 13 Pro Max & 14+ & 14 Pro Max

3) Ultimate optimization of power and acceleration measurements accuracy (based on the "Accelerometer + GPS" combination)

A) Accelerometer frequency still limited to 100 Hz (optimal setting), but detection of the starting point still refined

B) Optimization of the end of measurement detection (rev limiter - on petrol engine - or foot lift) (power only)

C) Optimization of the curves processing by the choice of a new, more efficient signal processing technique:

- Filtering of engine vibrations optimized

- Filtering of "road disturbances" optimized

D) Creation of an auto-adaptive smoothing of the curves according to the signal / noise ratio, allowing an optimal precision of curves in all circumstances and the equalization of the precision of curves in 2nd and 3rd gear (power only)

E) Optimization of the PerfectPower model of losses under load on the pneumatic part (power only)

F) Optimization of the PerfectPower model of rolling resistance, adapted to recent road tires (law still of type a + bV², but a changed from 130 to 120 N/t and b changed from 45 to 25 N/t @ 100 km/h (62 mph), average values recorded by a European test campaign in 2013 on a very large number of vehicles; the old values were the average values recorded by me on my 3 personal cars) (power only)

G) Optimization of the PerfectPower model of engine and wheels inertia calculation (power only):

- The calculation of the engine inertia now takes into account the number of cylinders, which gives more realistic results for all engines with more (or less!) than 4 cylinders: indeed, my old model was based on a study of several PSA (Peugeot & Citroën) 4-cylinders, which could not fully apply to engines with more or less than 4 cylinders, but the shooting is now rectified!

- The calculation of the wheels inertia is refined thanks to the optimization of my model (Renault Clio 16V wheels with aluminum rims), much finer on the geometric schematization of the moving masses.

4) Removal of the function of automatic recovery of weather data, which will be replaced in the next version (5.1) by a function of manual recovery of these data in real time and by geolocation on the reference weather site "The Weather Channel"

Note: The reasons for this choice are as follows:

- The last weather server used for the automatic recovery of weather data stopped its service overnight, a mishap that I would prefer not to see repeated...

- This type of service is chargeable beyond a certain number of connections per day, which would force me to have to pass on this additional cost to PerfectPower users, whereas it takes no more than... 20 seconds to complete yourself your own weather data (pressure, temperature, and humidity) with the new manual recovery system that I propose, including in particular the automatic conversion of the atmospheric pressure given at sea level (by standardization) into the local pressure on your measurement road: so I think this solution is the most advantageous for everyone!

5) Various textual and graphic modifications + Update of all web links (FR/EN guides)


III) Tests


A) Comparison PerfectPower / Dyno Rotronics Autoscan FI 4x4 synchronized: A perfect equality !

(+ the revelation of the real winner of this comparison...)


B) Comparison PerfectPower / RaceBox Mini: The duel of the giants!

(2 hundredths of a second difference on a 0 - 200 km/h !!!)


Publication very soon of a comparative test of the accelerations of my Audi S2 measured simultaneously with PerfectPower & SkyPro XGPS 160 10 Hz and with RaceBox & RaceBox Mini 25 Hz. 2 hundredths difference on a... 0 to 200 km/h (0 to 124 mph), knowing that PerfectPower has long proven that it is the most powerful power and performance calculation and measurement program in the world and that before the arrival of the RaceBox Mini the SkyPro XGPS 160 regularly won Internet comparisons of external GPS, this proves two things:

- The excellence of the calculations of the RaceBox software for the acceleration measurements, obviously very similar to the calculations of PerfectPower (each naturally keeping its secrets, even if we have of course exchanged on this subject and that we both refine the ultra-accurate detection of the starting point with the accelerometer...)

- AND of course the excellence of their RaceBox Mini, of course even better than the SkyPro XGPS 160 since much faster (25 Hz against 10 Hz) and much more accurate (0.3 m (1 ft) of average horizontal precision against 2.5 m (8.2 ft))!


IV) Website


The website is being restructured and in particular it is acquiring a multilingual management system (English, French, and Russian), and it will not be fully operational until May 2023, thank you for your patience.


V) Miscellaneous


A) Future developments planned (PerfectPower Android and iOS 7.x) for 2023


1) Export data to a CSV file

2) Optimization of the memory management, allowing the import / export of data between phones

3) Optimization of the performances simulation:

- Optimization of the grip limit calculation with modern sport tires (I will lead my own tests with my cars)

- Automatic delivery of reference flying start runs measurements following a power measurement:

25-50 mph & 40-80kph

50-75 mph & 80-120 kph

60-120 mph & 100-200 kph (if the car can of course)

4) Adding the informative fields "Engine inertia", "Wheels inertia", and "Total inertia" in the car sheets and the power results sheets

5) Adding the informative fields "Engine power at rev limiter" and "Estimated tire slip" in the power results sheets


B) Project "Conversion to E85 of a BMW M3 E46 compressor" (+ 67 hp!!!)


Dates: Fr 03/02/2023 (day 1) + XX xx/02/2023 (day 2)

Location: Digi 77 (has a Rotronics Autoscan FI 4x4 synchronized chassis dynamometer, the market reference)

Car: BMW M3 E46 equipped with an ESS Tuning compressor kit - Leni


Project: Conversion to E85 and optimization of the electronic management of this BMW M3 E46 compressor

Members of the PerfectPower group in charge of the project: David & Vincent


Work done (day 1):

- Reference measurements with unleaded 98 with ESS Tuning mapping

- Search for optimization of VANOS settings (we did not do better)

- Conversion to E85 (including change of fuel pump and fuel pressure regulator)

- Optimization of injection settings (we did slightly better)


Work done (day 2):

- Optimization of ignition settings

- Final measurements with E85 with our PerfectPower mapping


Results measured on day 1 with unleaded 98 with ESS Tuning mapping (claimed at 540 hp)

493.5 ch @ 7735 rpm (= 486.7 hp @ 7735 rpm)

477.0 Nm @ 6654 rpm (= 351.8 lb.ft @ 6654 rpm)


Note: Regardless of the difference between the power actually measured and that claimed by ESS Tuning which may have various explanations, Vincent and I (who have been working for years on the maps of these S54B32 engines) would like to point out that the map they have developed has been remarkably worked on, especially on the VANOS (we have not succeeded in improving their adjustment!), and has nothing to do with the vast majority of what we observe coming from France with people claiming to be "specialists" of these engines... It's still nice to see that there are truly competent and serious people in this world!


Results measured on day 2 with E85 with our PerfectPower mapping

Coming soon...


Ready for reference measurements with unleaded 98 with ESS Tuning mapping!


Search for optimization of VANOS settings between 5000 and 8000 rpm


Search for optimization of injection settings (with rev limiter voluntarily set to 7000 rpm) (1/2)


Search for optimization of injection settings (with rev limiter voluntarily set to 7000 rpm) (2/2)


VIDE0 (reference measurement with unleaded 98 with ESS Tuning mapping)



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