From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [LML] Re: Where has all the power gone?
To: lml
Date: Fri, 23 Dec 2005 17:23:04 -0500
Message-ID: <web-894188@logan.com>
In-Reply-To: <43AC2A50.7030106@lazy8.net>
References: <list-893765@logan.com>
 <43AC2A50.7030106@lazy8.net>
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Posted for John Huft <aflyer@lazy8.net>:

  Well, Walter, if you look at my entire post...
  
  
  "On my normally aspirated engine, the LSE does not advance timing at all for
the case of full power (i.e. 2700 rpm and > 26 in. Hg. manifold pressure). So,
I would not think the advance curve comes into play in a full power run on the
dyno. I doubt that the stronger spark causes a power loss."
  
  
  You see, I just said that there was no timing change at > 26" MAP, so, then,
a stronger spark is not going to cause a power loss.
  
  Obviously, if you change the timing, you change everything.
  
  In my airplane, I have the digital display readout of the actual timing
advance provided by the LSE. So, I can watch what it is doing at different
power settings. With ram air at low altitudes, I have seen 31" MAP, and from
there down to at least 26, the timing remains at baseline (for my engine, 20
degrees BTDC), even at high RPM. I can't say what it would do at 40" MAP, that
is a question for Klaus.
  
  John
  
  p.s. Yeah, I did some dumb things during my high school hot-rodding days, 
but
then, I still do :o)