RE: horsepower

[Gernot von Hoegen <avac@totalise.co.uk>]

>===== Original Message From nick Glase <jng2@cornell.edu> =====
>Any ideas if the fan clutch significantly reduces this high speed loss? I'm
>rebuilding a spitfire with a weber side draft, new headers etc., and wonder
>if i should take the antipurist approach another step with an electric fan.
>Has anyone out there converted to electric on a 1500 motor?
>
>Thanks, Nick
>
>79' Spitfire
>

the idea is exactly the one mentioned. The fan spins at near engine revs at 
low speed giving maximum efficiency. At high engine speeds the fan spins 
significantly slower than engine speed reducing this tendency. However, even 
there it is worth fitting an electric fan since the colling system doesn't 
need a fan at all at speeds from say 30 mls upwards exept when pulling high 
loads.

............Gernot von Hoegen................
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