sucof wrote: ↑16 Jun 2026, 00:40
I do not know if I can buy the argument I read here before, that hotter air would mean more HP... that is quite against my knowledge of physics and the general knowledge how air temp vs combustion works.
I had asked this here, ever since these 'intentionally hotter' media articles started flying around :
venkyhere wrote: ↑11 Jun 2026, 19:38
What I understood as the general philosophy of Ferrari with the SF26 :
Going for a worse IAT, subsequently resulting in a hotter-than-typical ECT and EGT, and "winning on the packaging front for better aero" , the backpressure from covering half the exhaust "for better aero" - both of which penalize raw power output from the ICE.
Pardon me for the noob question :
1) How exactly is increasing IAT even more, going to win back some of the sacrificed horsepower from 'better combustion chamber efficiency' ?
sucof wrote: ↑16 Jun 2026, 00:40
An other solution could be that all these mean, higher turbo pressure and the hotter intake air is just the end result of that. So Ferrari could create a lot higher intake air pressure without enlarging the intercooler or destroying the engine because of the high temps. And the higher intake pressure can result in better combustion and HP.
But I am here to be corrected
If we can crudely approximate air as an ideal gas, temperature is the avg kinetic energy of any randomly chosen molecule, and pressure is total kinetic energy of such molecules in unit volume (thus including the number density of molecules, in fact, this is the essence of the PV=nRT equation).
The primary purpose of intercooler is to reduce temperature, so that detonation/knock doesn't happen when the piston does adiabatic compression and increases the temperature of the air even further. The 'intercooling' can be achieved very inefficiently, leading to pressure drop, but since the engine would like as many oxygen molecules as it can
(the 'n' is what matters, it doesn't care about P or T, as long as T is below a threshold, a turbo is an 'n' increasing device and while doing it the increase of P&T are byproducts of the execution), per combustion, a good intercooler will have minimal pressure drop. If both conditions (good temp reduction and minimal pressure drop) are to be satisfied, the intercooler usually need to have large area (minimal friction through the channels and maximum surface area). By compromising on intercooler area, Ferrari might be ready to 'suffer' more pressure drop or more intake temperature or both, and they might 'combat' it by engineering their fuel to have higher threshold to defend against detonation/knock. But whichever way we cut it, there is no way conventional understanding of ICE can explain 'more temperature of ingested air' by a compression engine producing more horsepower.