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Toto suggests in the above article on AMuS that last year Ferrari PU was over 50kW (68HP) more powerful than their unit at some races ...
On this matter, someone said on another forum that there are at least 4 motives why 2020 PU apparently is so powerful :
1. The first and most important one: with this year PU they could operate some 28 degrees Celsius higher for both new upper sidepode cooling chassis arrangement and an improved coolant. Thus it could be run harder in higher modes both in the race but especially in that Q3 party mode. That`s why all their customer teams are better in qualy this year.
2. The second reason: Petronas has brought (besides a better coolant) a new fuel formula which was initially designed for the last year PU but forced to be put on halt due to their cooling issues. So, practically they have had 1 year to reformulate and further improve this formula adding HP gains for both fuel upgrades.
3. The third reason: they were forced to turn down the power a little due to their cooling issues with W10. This year they have not been hampered anymore with this problem ...
4. The last reason: with regards to the above motives and the fact that Ferrari PU is down on power (compared to 2019 unit) they are now ahead on power, although their net gains in HP for 2020 are not so big as some untrained eye could speculate ...