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Ready-made VW fat fin heads?

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cluttonfred

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The late R.S. "Bob" Hoover was working on a project to develop a VW-based standard, affordable homebuilt aircraft engine, basically a big bore VW with low-cost accessories and mods for better performance.

A key element of Hoover's approach was the "fat fin mod" which involved brazing or welding on additional fin area to allow the VW heads to shed more heat.

I came across these ready-made "fat fin" VW heads and there many be others as well. My question is, why aren't all the large VW conversions using these or something similar?

Mofoco 042 Performance VW Heads - Highest Flowing Unported Heads

Cheers,

Matthew
 
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