Quoting George Braly <gwbraly@gami.com>:

> many times.  And of course you always add that
>
> "I took one of these "stock"  IV-P's and fixed
> it.  It took a fair amount of time and effort, and a lot of experience
> to know
> what to do and how".
>
>     OK, so you and Gami are the smartest bunch in the world, but to
> suggest that you know a secret that would provide all of us dummies
> building LIVs a better engine installation and never share the details,
> well it has become tiring.  If you want to sell this magic, offer it as
> a product.  If you want to be real helpful, provide a drawing.

Lancair IV's are a little more challenging to cool than the average homebuilt.
Nevertheless, the priciples are the same for all aircooled engines. Faced with
similar problems with my Varieze, I turned to NACA reports from the 30's and
40's. I described my experiences in two articles for the canard community. You
may find some of the information here is useful to you. A neighbour recently
installed a plenum system based on these articles, in a 200HP Lancair 360 and
reports very good cooling with only 12 sq. inch total intake surface area.

http://x-jets.com/a_cooling_efficiency.html

http://x-jets.com/a_downdraft_cooling.html

Regards,

Andreas