Mike,

First, I am not a spokesman for either Darryl or Andy. However, there are
some inaccuracies in what you understand about Darryl's system.

Let me quote. "Perhaps most important of all the work he (Darryl) and
Chiavetta did with the engine cowling. "Thirty percent of the plane's drag
is from cooling" Greenamyer says. In a stock Legacy, air enters the engine
case through intakes in the plane's nose, where it whips around, creating
zones of low pressure. In Greenamyer's Legacy, the intakes are substantially
smaller and a small wing splits the air, directing carefully calculated
portions to the engine, which sits in a sealed plenum, and to the
turbochargers". From an article in Popular Science.

The blisters on Darryl's cowl are bumps for clearance purposes, not for
venting air out the top of the cowling.

During a race, Darryl uses both ADI and a water spray bar for cooling at the
high manifold pressures. During normal flight the system in not installed,
so not used.

Greg Cole was involved in the design of Darryl's plenum.

The Nemesis NXT uses a plenum. I wonder why?

If a person thinks that George's way is the only way to go I'm sure that his
methods will provide excellent cooling. But I like what I have seen and
heard from Darryl and Andy. In that vein, I'm putting my money where my
mouth is.

I wish you the best in keeping your engine cool.

Regards,

Lynn