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Old 08-04-2009, 03:27 AM   #5 (permalink)
lunarhighway
Master EcoModder
 
Join Date: Feb 2008
Location: belgium
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vectra a - '95 Opel Vectra GLS
90 day: 37.51 mpg (US)
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i think the important thing is the curvature above and beside the grill and how open the grill really is (some grills are partly blocked and some have better internal ducting than others) also the tip of the hood isn't the most forward part of the car, the bumper is. is you fill the void between the bumper and the hood with a high pressure bubble (easiest to spot in the concept sketch) you'll get an almost round shape.

once certain things like the size of a grill is determined by either function or fashion it's all about small details... tweaking certain angles and curves
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