"Del Johnson, North Point Solutions, Inc" wrote:

Great discussions on the subject of exhaust tuning.

One of the emails contained information on the work of a builder that was
installing tuned muffler system in using a Subaru engine.  It included a
reference and picture of a 1/2" tube into the collector that was used to
supply vacuum for the instruments.  Unfortunately I can't locate that email
in my outlook list to include it in this reply.  I would be interested in
finding out more about the vacuum tap on the exhaust system and how
effective it is.  Could the person that supplied that email contact his
friend that is building the Subaru engine/airplane and get more details.

Perry Casson wrote:

I think you are refering to Phil Johnson's project at
http://www.geocities.com/plmjohnson/exhaust.htm There is email contact
info for him on his site.  I've never asked him how well the vacuum source
is working.

Perry Casson

 
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