[scottj]

Cooling System Basics for Spark Ignition Engines SuperFlow Advanced Engine Technology Conference, December 7, 1992

Quote:
Coolant temperatures are not an accurate indicator of metal temperatures. The coolant's maximum temperature is it's pressure corrected vapor point. The metal can be several hundred degrees hotter than the adjacent coolant

Higher coolant flow will ALWAYS result in higher heat transfer. Coolant cannot absorb heat after it reaches it's pressure corrected vapor point.

Coolant flow has a direct relationship to area and an exponential relationship to pressure. Meaning that when you double the area of an orifice and maintain pressure the flow doubles, but when you double the pressure and maintain area the flow is only increased by 1.414 (the square root of 2). End Quote

Restrictors REDUCE the area, REDUCE the flow, and thereby REDUCE the coolants effectiveness in transferring heat. The result of this is INCREASED hotspots and steam pockets in the heads. Steam pockets ELIMINATE the coolants ability to transfer heat in that area, resulting in increased metal temperature and increased chance of detonation.

If you guys just want to feel good about 1950’s theories then continue stroking each other.

Dance lesson over. Scott