The Murphy Builders Site

We have been inching forward and now have the engine hung and mounted
the carb and carb heat air box. We have a MAM firewall forward package
and a Lycoming O-360A4M for which the FWF package is designed. It looks
like the carb heat box will stick well out of the cowling bottom. Not
just the heat dump tube, but at least half of the box body. It also
appears that the carb heat box face where the air filter mounts will be
well back from the rectangular cowling air intake cutout. The cowl is
the "speed cowl" that Bob P is so fond of. Am I overly concerned? When
the cowling is mounted and cut back at the bottom will all will be well?
Comments from those of you who have walked this path already would be
most welcome.
Thanks,
Ralph Baker
Elite 624E


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Sent this prior with no replies so I suspected that it didn't make it so
will resend. You guys are not usually so close mouthed if it did get
through.
Thanks,
Ralph

----- Original Message -----
From: "Ralph Baker" <rebaker@ftc-i.net>
To: <murphy-rebel@dcsol.com>
Sent: Monday, April 14, 2003 10:06 PM
Subject: Speed Cowling

We have been inching forward and now have the engine hung and mounted
the carb and carb heat air box. We have a MAM firewall forward package
and a Lycoming O-360A4M for which the FWF package is designed. It looks
like the carb heat box will stick well out of the cowling bottom. Not
just the heat dump tube, but at least half of the box body. It also
appears that the carb heat box face where the air filter mounts will be
well back from the rectangular cowling air intake cutout. The cowl is
the "speed cowl" that Bob P is so fond of. Am I overly concerned? When
the cowling is mounted and cut back at the bottom will all will be well?
Comments from those of you who have walked this path already would be
most welcome.
Thanks,
Ralph Baker
Elite 624E

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Actually it did get through but nobody jumped on it!!

I haven't done an O-360 so not sure if it is that much deeper than an O-320.
I wouldn't think so but maybe it is. The O-320 with the carb heat/filter air
box fits inside the cowling and only the dump pipe sticks out through the
bottom to get ride of the hot air when running filter. If I recall, a good
inch of space between the bottom of the air box and the lower cowl material.
As for the filter location. Get it roughed in and then either use a rubber
lip to seal off to the filter sides or extend the glass back so it almost
touches to keep the ram air effect without much leakage by the filter face.

I know that doesn't help you much, is there not someone on the list with an
Elite and O-360 that has reached this stage. What about the one that Steve
Sloan had posted pics of in Washington State??

Cheers,
Wayne



----- Original Message -----
From: "Ralph Baker" <rebaker@ftc-i.net>
To: <murphy-rebel@dcsol.com>
Sent: Thursday, April 17, 2003 10:55 PM
Subject: Fw: Speed Cowling

Sent this prior with no replies so I suspected that it didn't make it so
will resend. You guys are not usually so close mouthed if it did get
through.
Thanks,
Ralph

----- Original Message -----
From: "Ralph Baker" <rebaker@ftc-i.net>
To: <murphy-rebel@dcsol.com>
Sent: Monday, April 14, 2003 10:06 PM
Subject: Speed Cowling

We have been inching forward and now have the engine hung and mounted
the carb and carb heat air box. We have a MAM firewall forward package
and a Lycoming O-360A4M for which the FWF package is designed. It looks
like the carb heat box will stick well out of the cowling bottom. Not
just the heat dump tube, but at least half of the box body. It also
appears that the carb heat box face where the air filter mounts will be
well back from the rectangular cowling air intake cutout. The cowl is
the "speed cowl" that Bob P is so fond of. Am I overly concerned? When
the cowling is mounted and cut back at the bottom will all will be well?
Comments from those of you who have walked this path already would be
most welcome.
Thanks,
Ralph Baker
Elite 624E

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Ralph, my 0320 carb/heat was above the stock cowl
bottom as well, but not sure how the 0360 fits.
However, you will most likely want to increase the
cooling exit from the stock cowl anyway, so you can
always cut out that area and replace it with a bottom
that is a little lower.

Walter

-----Original Message-----
From: mike.davis@dcsol.com
[mailto:mike.davis@dcsol.com]On Behalf Of
Wayne G. O'Shea
Sent: Thursday, April 17, 2003 8:07 PM
To: murphy-rebel@dcsol.com
Subject: Re: Speed Cowling


Actually it did get through but nobody jumped on it!!

I haven't done an O-360 so not sure if it is
that much deeper than an O-320.
I wouldn't think so but maybe it is. The
O-320 with the carb heat/filter air
box fits inside the cowling and only the
dump pipe sticks out through the
bottom to get ride of the hot air when
running filter. If I recall, a good
inch of space between the bottom of the air
box and the lower cowl material.
As for the filter location. Get it roughed
in and then either use a rubber
lip to seal off to the filter sides or
extend the glass back so it almost
touches to keep the ram air effect without
much leakage by the filter face.

I know that doesn't help you much, is there
not someone on the list with an
Elite and O-360 that has reached this stage.
What about the one that Steve
Sloan had posted pics of in Washington State??

Cheers,
Wayne



----- Original Message -----
From: "Ralph Baker" <rebaker@ftc-i.net>
To: <murphy-rebel@dcsol.com>
Sent: Thursday, April 17, 2003 10:55 PM
Subject: Fw: Speed Cowling

Sent this prior with no replies so I

suspected that it didn't make it so

will resend. You guys are not usually so

close mouthed if it did get

through.
Thanks,
Ralph

----- Original Message -----
From: "Ralph Baker" <rebaker@ftc-i.net>
To: <murphy-rebel@dcsol.com>
Sent: Monday, April 14, 2003 10:06 PM
Subject: Speed Cowling

We have been inching forward and now

have the engine hung and mounted

the carb and carb heat air box. We have

a MAM firewall forward package

and a Lycoming O-360A4M for which the

FWF package is designed. It looks

like the carb heat box will stick well

out of the cowling bottom. Not

just the heat dump tube, but at least

half of the box body. It also

appears that the carb heat box face

where the air filter mounts will be

well back from the rectangular cowling

air intake cutout. The cowl is

the "speed cowl" that Bob P is so fond

of. Am I overly concerned? When

the cowling is mounted and cut back at

the bottom will all will be well?

Comments from those of you who have

walked this path already would be

most welcome.
Thanks,
Ralph Baker
Elite 624E

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mike.davis@dcsol.com
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To contact the list admin, e-mail

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Need some advise please ....................

I am just starting to fit the MAM speed cowling around my O-320. The
problem is this. The air inlet openings are about 70 square inches in
total. The air outlet is only about 18 sq. in. when the bottom cowling is
tight against the bottom of the firewall. Unfortunately, the outlet
opening needs to be bigger than the inlet - let's say 10% bigger or 77 sq
in.

The only way I can figure to solve this problem is to perform a major
rework on the bottom cowling, creating an opening about 3" high by about
25" wide. Having far...d around for hours with the other fiberglass
pieces, this is not my first choice. I thought of just lowering the
cowling at the firewall enough to create the larger opening, unfortunately
this would result in the front flange of the cowling not be in-line with
the spinner and the top half. There is enough material to do the this,
but the back edge of the cowling needs to be flush against the bottom of
the firewall to fit properly at the front.

Any suggestions?

Mike Ash



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Thanks for input. I should have done the research before I bought the
cowling in the first place. Maybe Darryl will give me my money back.
Arrrgggghhhh!

What I couldn't find in the archives were any pictures of the modified
speed cowl (inlet and outlet). I think I am developing a plan, but I need
a visual. Anybody have some pics handy?

Mike Ash



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