4 ms·
Air is a pretty bad thermal conductor. An average ICE is only producing 200HP at a specific RPM, for short period of time. Red-lining any sedan while being sta
by alacombe 6y ago
Air is a pretty bad thermal conductor.
An average ICE is only producing 200HP at a specific RPM, for short period of time. Red-lining any sedan while being stationary will probably overheat the engine pretty quickly, as the on-board radiator fan either electric or mechanical will not provide enough airflow. They are designed to be cooled by incoming air while driving.
- ferongr 6y agoNot really. The actual load on the engine when redlining it while stationary is very small. You can monitor the fuel injector duty cycle, air flow mass or the useful "Load" PID using an OBD scanner like Torque.
- alacombe 6y agoWhether or not there is torque applied is irrelevant. For the sake of argument, when talking with a carburated ICE (ie. no electronic optimization), at full throttle, whether you redline with a load or not, at the same RPM, the same vacuum will be produced at the intake, and you will burn the same amount of fuel, thus produce the same amount of heat.
- ferongr 6y agoWell, with a carbureted engine that has no mechanism to limit RPM, you're probably not actually producing work at maximum RPM, but rather wasting mixture due to valve float. In essence, you're not burning that mixture. If you did, the RPM would keep increasing until the entire motor disintegrated. With electronic ignition, you usually have a way to limit max RPM by stopping ignition, so you're not producing work (and heat) either way.
- alacombe 6y agoThere mechanism to limit RPM on carburated engine, it's called a governor.