Good Morning...

A 6 port engine having the auxiliary and secondary
ports with, I am assuming here, their own respective
wave opening and closing events.  Now only one intake
runner serving both ports, which port/wave event do
you time your intake runner length to?  

The auxiliary as this is the port which opens later
and closes later?  But, I then miss the exhaust burp,
A pulse?, as this went with the opening of the
secondary port...

If I choose the secondary, then my intake charge leaks
out when the auxiliary opens.  

Perhaps a 6 port was not the wisest of choices?

I had originally thought I would use the opening of
the secondary port and the closing of the auxiliary
port as my starting point for capturing the DIE.  This
led to a port-to-port of somewhere in the 50" range.
Well, I have 20" on runner welded up, then started
thinking where was I going to find another 30" under
the cowl.  Now I do have a lot of room under the cowl,
but the 30" just started to sink in...

Thank You.
-Scott



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