If You Want More Speed, Here's How To Deal With The Heat

Illustration for article titled If You Want More Speed, Here's How To Deal With The Heat

In /Drive’s latest series, Betim Berisha, an engineer responsible for some very fast Porsches tells you all about temperature management when it comes to increasing horsepower.


You have a huge radiator and enough holes in your wheels to cool the brakes sufficiently. Fair enough, that should keep you in the green as long as you don’t take your car to the next level, aiming for some intensive track action.

A Porsche 911 tuned to 1,500 horsepower for drag racing needs less cooling than a Porsche 911 tuned to 500 horsepower for endurance racing mainly because it all comes down to how much power you want to make for how long. The more cycles the fluids have to complete, the more heat there is to take care of.

That why you have to take into account the air density, the positioning of your radiator, heat exchangers, oil coolers and other surfaces in regards of the airflow, fluid pressures, pump cycles and everything else that need liquid cooling and gets worked hard, be that the transmission, the differential, the power steering unit or the engine itself.

If your car is overheating, I guess it’s time to look at the airflow, your surface area or the volume of the radiator(s). Reliable horsepower starts with stable temperatures.

Photo credit: Getty Images


Contact the author at mate@jalopnik.com.


Wild Weasel

I’ve been wondering about something and Google hasn’t helped me. Why aren’t wheels designed with spokes shaped like fan blades to pull air into the brake rotors?

It seems like an obvious advantage, but clearly isn’t because nobody is doing it. I just don’t know why. Maybe it absolutely ruins aerodynamics or causes your lugnuts to unscrew themselves or something. I just can’t find a valid explanation. Is it just completely useless? Maybe it just doesn’t work? Does the air go by too fast to be sucked in without some sort of scoop to grab it?