Hi,
My name is Chris and the Aero stuff here is from my web page. It's interesting to see it has other interest besides my Autocross racing.
2,892 lbs is the gross vehicle weight. The curb weight is 1982 lbs.
I have two 914s.
My 1972 914 that is setup for Autocross use weights less then 1982 lbs.
Porsche the Ultimate Guide: The ... - Google Book Search
My stock 1974 EFI 2.0L gets +30 mpg.
Good luck with your pursuits, Chris