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Lastly I will be restoring a 68 VW Bug, mainly for its total lack of everything and it main long life and ease of repair and nearly lack of the need of any repairs.
I do not think these do all that well MPG I have only seen 25 to 30MPG on record.
It is a 1600Dual Port with a good Weber progressive two barrel feeding it and running a Super Bettle Trans-axle for its taller gear rear end.
Has anyone done any MPG work on one of these??
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Yes.
Here is the original Hot VWs series of articles on their Mileage Motor:
https://www.cbperformance.com/Featur...cles-s/142.htm
Here is the aircooled.net Mileage Master long block:
https://vwparts.aircooled.net/Aircoo...long-block.htm
My personal bests: Type II panel van with fresh dual port 16000 with 40mm Kadrons -- 30 MPG
over the Coast Range at speed (the last time it went 55 MPH).
Stock 1971 Superbeetle through Eastern Oregon at 45 MPH overnight on the way to Bonneville Flat Flats (to see aerohead) -- 34 MPG
The 25hp, 1100cc Beetle was capable of 40 MPG but a citation is needed.
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Originally Posted by aeorhead
3) There are smoke-flow wind tunnel images of the standard Beetle in the Volkswagen wind tunnel. The wind shield area appears free of separation.
High ( Cd 0.495 ) drag would be attributed the the aft-bodies severe, steep curvature.
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The Beetle has more width through the B-pillar than the A-pillar. The windshield is in a favorable pressure gradient. The lack of fineness ratio is exploited for engine cooling air.
That said a 36 HP engine in a late Superbeetle body has been done.
https://saltflats.com/36_HP.html