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Old 05-09-2011, 04:33 AM   #10 (permalink)
lunarhighway
Master EcoModder
 
Join Date: Feb 2008
Location: belgium
Posts: 663

vectra a - '95 Opel Vectra GLS
90 day: 37.51 mpg (US)
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looking good!


now that you have a nice surface to build on, you may try to add tire dams. i'd say about 5 cm from the tray down and the width of the tires and perhaps part of the suspention as well, also you could extend the front airdam sides (about 2-3 cm) in front of the tires only.

also the next step i took after doing something similar was cover the rest of the engine bay with an aluminum sheet, it turned out the subframe had square holes that where inteded for dirt cheap matal clips that could take a screw... although my car never had an undertray, it did have provisions for one, so perhaps that's worth chekking too.
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