Braking wastes a lot of KE as heat, which is why brake discs glow.
you can easily produce that heat with less than 50% of the KE lost in a braking section. the rest goes towards recharging the battery.
It's a 737hp engine, pretty sure that can generate energy very fast
absolutely NOT. that engine is not at power-generating disposal when braking, nor the gearing is correct, nor the rpms. power generation, if any, happens just by increasing ICE load while braking, i.e. almost insignificant.
You're the one who needs to quit blabbing, the P1 can do 2 laps of Silverstone in a row before a cool down lap,....
The P1 does not have to pit after 5 minutes, where the hell does it say that?
until you provide some data showing how much electric energy P1 can recharge per minute, there will be no such a thing as "a cool down lap to recharge" for P1. P1 will have to pit and plug in to recharge. Unless it can recharge when ICE accelerates, as well, but this is not the case, as it seems.
From what you keep quoting, P1gts battery is completely out of
juice after 4-5 minutes of track time (otherwise why would it need to slow down, since it has much less battery overheating issues), which implies the recharging you keep blabbing about simply does not happen in any meaningful way.
with brake regen, P1gtr would still have some kwhs at its disposal after 5 min of track time, hence no need for slow laps because of power unit in that case.
Fxx-k does not need to pit, it just needs to cool down the battery, more so than P1, and it can do that by using less motor power (since apparently it cannot completely exclude motor power outputs), which can be done just by slowing down. FXX-K has 4 modes to do that: each has different schemes of motor use/generation. The "fast charge" mode is the one that allows to least use of the motor for power output. I bet those writing about alternating 1 hot lap and 1 slow, switch from "qualify" mode and "fast charge". with "long run" one should be able to run indefinitely.