-----Original Message-----
From:
mike.davis@dcsol.com
[mailto:
mike.davis@dcsol.com]On Behalf Of
rebel@dcsol.com
Sent: Sunday, June 22, 2003 7:03 AM
To:
murphy-rebel@dcsol.com
Subject: RE: Speed Cowl Inlets
Walter,
The actual openings get smaller but I
think that the effective opening is
the same or greater(due to the smaller upper
lip thickness). The actual
openings that I refer to and have just
measured are, the left side is 3 3/4"
high (measured straight up and down at the
rear of the opening) and 7" wide.
The right side is 3" high x 7" wide. I did
not measure the original openings
but I think that they are 5" high x 7" wide.
When I say "effective opening" I
mean, the opening size that will allow air
to flow up and over the cylinders.
With the common baffling, the air looks like
it will slam into the large flat
wall of the baffling and bounce right back
out. Hence, I ramped the lower
inlets to smooth out the flow. The original
upper inlets were cut off and I
thinned down the radius of those upper inlet
lips and smoothly ramped back
about 7-8". I think that the vertical
thickness of the upper inlet lip was 3/4"
to 1". It is now 1/2 - 5/8". Hopefully this
will result in more effective
cooling. The left side provides cooling air
for the oil cooler and the ramped
air looks to be a great improvement over the
conventional approach. The left
side rises at about a 25* angle and the
right side rises at about 45*. I would
have liked to have curled the right side up
instead of just a straight angle
but that will have to be some other time.
The engine baffling will pick up
those angles to keep the smooth flow. The
plan is to put some silicone rubber
baffle material on the underside of the
lower ramped inlets and let that rubber
sit on top of the metal baffles that are
attached to the engine. I have also
fitted a front baffle seal behind the
flywheel to keep the air in the engine
compartment. Just ask if you have more questions.
Good luck, you'll need it,
Rick D.
Rebel S/N 404R N754SM
On 6/22/2003 5:30 AM,
WALTER.KLATT@SHAW.CA
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-> Date: Sat, 21 Jun 2003 07:12:38 -0700
-> From: Walter Klatt <
walter.klatt@shaw.ca>
-> Subject: Speed Cowl Inlets
-> To: Murphy-Rebel <
murphy-rebel@dcsol.com>
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<
PFEOJDIIGOHLFACHDMDNEENACHAA.Walter.Klatt@shaw.ca>
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-> Rick D., I was looking at your pictures
in the file
-> section where you ramped your inlets. Did
the change
-> also increase the inlet size, or do the ramps just
-> smooth flow? I couldn't tell for sure from the
-> pictures.
->
-> Walter
->
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