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Originally Posted by mar5ka
Trying to figure out what happened, my mileage was worse with my grill blocked anyone have any idea's
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Ideas:
- possibly faulty "test" methodology (what are you comparing it to? Identical speed & route? Identical weather & traffic conditions?)
- blocked too much, so your electric fan was running a lot more (significant electrical load)
- blocked too much, IAT's were elevated enough to cause timing to back down and lost efficiency
Quote:
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Also I found if I remove my passanger mirror there is a lot more wind noise
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What did you use to cover the hole with? Possibly it had less acoustic insulation than when the mirror was in place. The A pillar vortex can make a lot of noise.
Some people will refer to a mythical Chevy Caprice which supposedly had a better Cd with the mirrors ON, but I'm doubtful that any car wouldn't benefit from a passenger mirror delete.