"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

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

Thanks.  I just sent him a note.  I will this list with information that I
receive back from him.
Also, I found the original note.  I was scanning the old Spintech notes for
the ones that I saved with attachments because I remembered seeing pictures
of his installation.  It turns out the picture were on his website.

 
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