Mailing List flyrotary@lancaironline.net Message #11149
From: Russell Duffy <13brv3@bellsouth.net>
Subject: RE: [FlyRotary] Manifold Pressure
Date: Mon, 6 Sep 2004 13:06:44 -0500
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message
Thanks David and Ed for the comments.  
 
I believe I have a pretty good understanding of the MAP variables, and the conclusion continues to be that my intake runners, and TB are too small for best WOT "MAP", though that's not necessarily a bad thing.    
 
I guess the important thing for me to keep in mind is that improving the MAP, may not improve the power.   It's entirely possible that my smaller runners, and subsequent higher velocities are giving me more power than I'd get with bigger runners.  I certainly can't deny that I'm making significantly more power than in any previous NA configuration.  I would expect that I'm matching, or slightly exceeding Tracy's 13B static, and climb power in my current configuration.  He had a good pressure recovery scoop on the 13B, so it remains to be seen whether I can match his power at speed. 
 
Bottom line is that I'm happy with the current power that's being produced, and any improvement beyond this point would require a huge investment in time, and effort.  At the moment, I have far bigger problems, like adding enough oil cooling to make up for this extra power.  At least the current cooler isn't leaking (yet). 
 
Thanks,
Rusty (working on re-installing the series EWP)
 
 
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