[C320-list] Engine Sound Proofing Insulation

[warren updike]

I am one who runs the blower constantly while the engine is running; and, I
did run the blower power to the hot side of the key switch so I could
continue to run it after the engine is off. 
Oddly, the supply of fresh air from the blower duct on our 1994 #62 is
immediately across from the exhaust duct. Seemed to me that would impair a
proper flow of air around the engine. Also, keep in mind that the efficiency
of the alternator, it's ability to produce current, is directly related to
the ambient temperature. So, when I upgraded my alternator, I used a piece
of (3") duct to redirect the air flow from the blower along the port side of
the engine to just behind the alternator. Now, the fresh air must first flow
over the engine, gaining heat before reaching the exhaust duct. Seems a
better solution to me. All in all, a very easy thing to change.

Warren & Pattie Updike
Catalina 320, #62, "Warr De Mar"
Middle River, Chesapeake Bay



-----Original Message-----
From: Irving Grunes [mailto:igrunes at gmail.com] 
Sent: Friday, November 07, 2008 11:39 AM
To: C320-List at catalina320.com
Subject: Re: [C320-list] Engine Sound Proofing Insulation

Jamie

The engine temp will usually be controlled by the thermostat.

The engine compartment should run higher because of the added insulation.

At another discussion on this topic some time ago, someone said they run the
engine blower all the time the engine is running to take the heat out of the
underside of the aft cabin.  I seem to remember that he had to rewire the
blower switch so it would run with the engine switch off.

I know of no actual test results that have been made for before and after
engine compartment temps.

Irv Grunes
#851

On Fri, Nov 7, 2008 at 11:07 AM, <dickwalker at att.net> wrote:

> Not that I can tell.
>
> I found the big sheets easer to install than the tiles; each to their own.
> --
> Richard A. Walker, Ph.D.
> 740 Olive Ave.
> Coronado, CA 92118-2136
> (619) 435-8986
>
>
>
>
> -------------- Original message from "Jamie Pett"
<JPett at JP2ARCHITECTS.COM>:
> --------------
>
>
> > I have been following this thread as I am interested in cutting engine
> > noise also. Does the soundproofing installation contribute to engine
> > compartment heat ? Does the engine run noticibly hotter ?
> >
> > Jamie Pett
> > 'Bella Luna' #614
> >
> >
> >
> >
> > -----Original Message-----
> > From: c320-list-bounces at lists.catalina320.com
> > [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of warren
> > updike
> > Sent: Thursday, November 06, 2008 11:02 PM
> > To: C320-List at Catalina320.com
> > Subject: Re: [C320-list] Engine Sound Proofing Insulation
> >
> > Brian, I ordered the medium kit, SPM18, with 18 tiles. This was
> > sufficient
> > for both covers all surfaces. The adhesive is quite strong as I've had
> > no
> > problem with it these past three years. No mechanical fasteners were
> > necessary.
> >
> >
> >
> > I cleaned all surfaces with Interlux 202 which is a fiberglass cleaner
> > not
> > so volatile as MEK or Acetone. It will soften the surface of the inside
> > of
> > the covers so work quickly and don't go back over so much.
> >
> >
> >
> > I did not bend the tiles around the inside curves of the covers. I
> > butted
> > the edges so that there was a slight overlap of the aluminized cover and
> > the
> > foam backing was in contact. I arranged the tiles from these butt edges
> > and
> > cut where necessary joining the edges in the same way as on the curves.
> >
> >
> >
> > Cuts were made with a utility knife and a straight edge. Using the
> > straight
> > edge, I would compress the tile and score with the knife then two or
> > three
> > more passes through the foam backing. The cuts were clean an accurate. I
> > tried using scissors but didn't find they answered the need.
> >
> >
> >
> > I covered too some of the gel-coated surfaces on the port side. I had
> > about
> > 5 tiles left over. Sailor Solutions will give a credit for unused tiles
> > less
> > a restock charge and, of course, plus the shipping. I ended up selling
> > to
> > another boater. I don't know why I didn't use the extra tiles to cover
> > the
> > under side of the particle board covers under the mattresses. I don't
> > remember if I even considered it. You should.
> >
> >
> >
> > On my #62 with the Perkins engine there was no problem with spacing as I
> > had
> > no place where anything touched the tiles. You may find this an issue if
> > you
> > have the Yanmar engine as I understand others have had to cut out some
> > insulation around the engine pulley or water pump pulley.
> >
> >
> >
> > The sound reduction is significant though not so much as in your car.
> > Much
> > of the "sound" is vibrations passing through the hull by way of engine
> > mounts and leaks around joints. By consulting a sound proofing
> > consultant, I
> > learned that anywhere air can pass in/out of the space is a place where
> > sound will escape too. To that end, I sealed all edges of the covers
> > with a
> > foam tape. I think that helped some too. Also, try to keep the aft cabin
> > door closed when motoring. That may help some too.
> >
> >
> >
> > Good luck with your project. I ask that you come back to this list with
> > a
> > report on your project so others can benefit by your experience.
> >
> >
> >
> > Warren & Pattie Updike
> >
> > Catalina 320, #62, "Warr De Mar"
> >
> > Middle River, Chesapeake Bay
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > -----Original Message-----
> > From: Amirault Family - S&B [mailto:amiraults at sympatico.ca]
> > Sent: Wednesday, November 05, 2008 5:59 PM
> > To: c320-list at lists.catalina320.com
> > Subject: Re: [C320-list] Engine Sound Proofing Insulation
> >
> >
> >
> > Mr Updike:
> >
> >
> >
> > I contacted Sailor Solutions today at the link you supplied, and they
> >
> > confirmed that they ship to Canada. I intend to order now for a spring
> >
> > pre-launch install. Could you confirm for me how many tiles you used,
> >
> > whether the number is for both front and rear engine covers, and
> > includes
> >
> > the inside tops of each, and whether the adhesive is strong enough to
> > stick
> >
> > to the cover tops or if it is necessary to screw these in place?
> >
> >
> >
> > Having done the install, did you find the effort worthwhile and that the
> >
> > noise reduction was satisfactory? What did you use to clean the cover
> >
> > interiors and prepare them for the tiles? Were the tiles sufficiently
> >
> > flexible to adhere around the curved corners of the covers? Once
> > installed,
> >
> > do the covers still clear the engine external moving parts?
> >
> >
> >
> > For this relief, much thanks.
> >
> >
> >
> > Regards;
> >
> >
> >
> > Brian Amirault
> >
> >
> >
> > 797 Waltzing Bear, too
> >
> >
> >
>