TERF Email wrote:

Hi Paul

        I was just now reading a rather high brow description of the
differences in volumetric efficiency with the different porting styles.
Simply put it don't breath too good down at low rpm's when you P port em'.
I don't think any trick with fuel or ignition is going to make up for poor
VE.  You could however play really cool tricks with an electronically
controlled Turbo...

Matthew  mtait@terf.com

That is not what I am saying Matt. We don't care what the VE is at idle.
We just care if the engine runs smooth more or less. 

An example:
Klause sets the timing to exactly top dead center at low RPM.
This makes an engine very easy indeed to hand prop. The engine
never ever kicks back. A rough idle could be a kick back because
the engine does not have enough rotational inertia at low RPM 
to get past the explosion. Real old single cylinder engines with huge 
flywheels would run smooth firing every 30 seconds or even up to 
a minute :-).

Paul Lamar
 
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