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RedDevil · 12-31-2015, 12:16 PM

Hi, welcome!

Don't focus on the fog light covers...
Many modern cars have ridges on the bumper corners to block, rather than guide, the airflow over the corner.
This creates a high pressure area ahead of the bumper, pushing the air around the car more gradually and directing more of the air stream over the car rather than over the sides.
The model without the fog lights might have a slightly lower Cd than the version with the fog lights because of this effect.

A grill block (combined with a gauge to measure intake temp) may be effective and can be done inconspicuously, if behind the grill. Also airing the tires to max sidewall pressure, etc.
See the 65+ Efficiency mods from the link in the menu bar on the top.

40 mpg is pretty decent for a Veloster, good work!

12-31-2015, 12:16 PM	#2 (permalink)
RedDevil Master EcoWalker Join Date: Dec 2012 Location: Nieuwegein, the Netherlands Posts: 3,999 Red Devil - '11 Honda Insight Elegance Team Honda 90 day: 54.23 mpg (US) Thanks: 1,714 Thanked 2,247 Times in 1,455 Posts	Hi, welcome! Don't focus on the fog light covers... Many modern cars have ridges on the bumper corners to block, rather than guide, the airflow over the corner. This creates a high pressure area ahead of the bumper, pushing the air around the car more gradually and directing more of the air stream over the car rather than over the sides. The model without the fog lights might have a slightly lower Cd than the version with the fog lights because of this effect. A grill block (combined with a gauge to measure intake temp) may be effective and can be done inconspicuously, if behind the grill. Also airing the tires to max sidewall pressure, etc. See the 65+ Efficiency mods from the link in the menu bar on the top. 40 mpg is pretty decent for a Veloster, good work! __________________ 2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut. lifetime FE over 0.2 Gigameter or 0.13 Megamile. For confirmation go to people just like you. For education go to people unlike yourself.