Ready-made VW fat fin heads?

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Tornado Flyer

Active Member
Joined
May 19, 2015
Messages
35
Location
Beech Bluff, TN USA
Those heads look better than most aftermarket heads, in that they DO NOT cut down the NUMBER of fins compared to stock, which many drag racing oriented heads do. BUT they are NOT "fat fin" in the way the Bob Hoover was working on. He was tig welding additional fin AREA, so the whole head would get grow, in planes parallel to the valve cover gasket sealing surface. See below, which is a NOTIONAL plan view. The magnenta is the added fin area.
View attachment 86918
 

Tornado Flyer

Active Member
Joined
May 19, 2015
Messages
35
Location
Beech Bluff, TN USA
A few years ago a fellow with a Zenith 701 installed a VW engine and he used alumaweld to attach fin extensions, which I understood to work quite well. However, he later abandoned the VW for a Rotax 912 after his VW crankcase developed cracks on the way to Oshkosh.
 
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