REFLECTOR: ram air

[Sid Knox]

On my Starduster I mounted the throttle body directly behind (no air 
cleaner) the opening in the center of the cowl below the prop.  I estimate 
that I am getting a MP boost of perhaps one-inch.

The induction air for my Velocity comes from the right-hand NACA opening on 
top.  It is divided about 33/66 with the larger portion going for cooling 
cyls 2 and 4.  Total path length from the NACA opening, thru the divider, 
thru a K&N filter, and into the Bendix servo body is quesstimate 18 inches. 
I suspect that there is not much if any ram effect thru all that.

That did not answer your question... I think the amount of MP boost (if any) 
from providing "ram air" would be highly dependent on a bunch of variables 
and quite difficult to predict.

Sid Knox
Oklahoma

Velocity    N199RS
Starduster  N666SK
W7QJQ


----- Original Message ----- 
From: "Douglas Holub" <doug.holub at comcast.net>
To: <reflector at tvbf.org>
Sent: Tuesday, July 04, 2006 12:50 PM
Subject: REFLECTOR: ram air


To any of you engine guys out there, how much of a performance boost will I 
get from a normally aspirated, fuel injected Lycoming if I provide ram air 
for the intake?


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