The lower grille's a lot bigger than the upper. Once you get instrumentation- an SG or UG that can show actual coolant temp, try blocking the lower instead. It should give you a bigger aero and warmup benefit, and if you keep an eye on the temps you may find that the upper still lets in enough air for cooling.
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Originally Posted by sheepdog44
Transmission type Efficiency
Manual neutral engine off.100% @∞MPG <----- Fun Fact.
Manual 1:1 gear ratio .......98%
CVT belt ............................88%
Automatic .........................86%
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