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Old 01-01-2016, 04:05 PM   #16 (permalink)
Cyborg ECU
California98Civic's Avatar
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,052

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,282
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If it were my car and I shared it with a partner who seems trepidatious about conspicuous mods, I do the grill block as stealthy as possible. So only do behind the grill blocking. Also, as far as upper/lower, I'd want maybe a 70% block total and the remainder to be in frint of the cooling radiator (not the AC radiator) if possible. Experiment. Maybe leave the top grill alone because it looks pretty small and might only be about 30% of total grill opening. If so, try blocking all of the lower grill. Monitor coolant temperatures if you can (another reason to get an ultragauge is precise readings from all engine sensors including coolant and intake temps).

An added plus of an ultragauge... it reads engine trouble codes. It is *almost* as robust as those handheld diagnstic tools mechanics have.
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

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