The scangauge showed me little better results at higher speeds so I think the undertray works. No noticeable changes in driving behaviour. Maybe little less wind noise from the back at higher speeds. Tomorrow I will do my usual coastdown test and also the regular trip consumption test so I will know more then.
That undertray weigths ca. 15 kilos so its very stiff, but maybe too heavy :/ Next move is to make and connect side skirts to that undertray.
I have also plans for smaller altenator swap because the current is a whopping 120A one.
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