Quote:
Originally Posted by jonr
If minimizing engine heat losses outside of coolant flow is the goal, then the best way to do that would be insulation or a low emissivity coating (example, polished or chrome plated engine).
I'll do a test of MPG for the first 2 miles after a cold start and then repeat for a warm start. If it is a significant difference, then an electric engine heater might be worth it, even in summer.
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The aerodynamic losses through the engine bay constitute 12-percent of the vehicles overall drag.The grille-block is an attempt to reduce this drag,without compromising engine cooling.As an aside,for those who've done it,we're experiencing more rapid warm up,and can maintain engine heat longer during winter cycle driving "warm starts".But the whole premise behind the block is drag reduction.