Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Why are carmakers blocking the lower grille, not the top? (OEM active grille blocks)

VBOD · 08-20-2011, 02:52 AM

TIC, I'll take a SWAG at it. Assuming they are blocking the grill from the bottom up. Maybe they are assuming that the air next to the ground is hotter than air above it. No, really, on a hot day the air closest to the heat source (asphalt) is going to have more heat content than air just 18" above the asphalt. Lots of hand waving in this assumption but...

08-20-2011, 02:52 AM	#9 (permalink)
VBOD EcoModding Lurker Join Date: Jul 2011 Location: Yakima Valley, WA Posts: 45 Golden Egg - '95 Geo Prism LSI 90 day: 32.48 mpg (US) Family Truckster - '99 Mercury Mountaineer 4x4 90 day: 16.03 mpg (US) Big Green Machine - '89 Chevrolet V3500 3+3 4spd 4.56diff. 90 day: 11.47 mpg (US) Hondyssey - '04 Honda odyssey 90 day: 23.13 mpg (US) Thanks: 0 Thanked 0 Times in 0 Posts	TIC, I'll take a SWAG at it. Assuming they are blocking the grill from the bottom up. Maybe they are assuming that the air next to the ground is hotter than air above it. No, really, on a hot day the air closest to the heat source (asphalt) is going to have more heat content than air just 18" above the asphalt. Lots of hand waving in this assumption but...