[DeTomaso] Dynamat Xtreme results - electric motor whine

Mon Jul 22 20:07:16 EDT 2013

Wow… talk about thread drift….

:-)

On Jul 22, 2013, at 7:06 PM, Will Kooiman <will.kooiman at gmail.com> wrote:

> Heat is always a problem.  I haven't put a thermometer on my tank yet.  No
> fish yet.  If the temp is already too high, I may put a chiller outside or
> in another room.  If I do that, I will put the pumps outside.
> 
> I am considering building a sheet metal box around the pumps, and then
> dynomat the box.  But I still need ventilation for the pumps or they will
> wear out very fast.
> 
> Currently I have plywood with foam egg crate sound deadener.  The sound
> deadener helps a lot with water noises, but it doesn't do much with the pump
> whine.
> 
> One guy replaced the plastic fans on the pumps with computer heat sinks.  I
> won't go that extreme.
> 
> Another idea is to check the pump bearings.  If they wear, the whine goes up
> dramatically.  That's way down my list  after finishing my Pantera brakes.
> (like how I made it on topic?)
> 
> --
> Will
> 
> From:  Jeff Cobb <jeffcobb1 at me.com>
> Date:  Monday, July 22, 2013 7:17 PM
> To:  <larry at ohiotimecorp.com>
> Cc:  Jeff Cobb <jeffcobb1 at me.com>, Will Kooiman <will.kooiman at gmail.com>,
> 'Ken Green' <kenn_green at yahoo.com>, 'Larry Finch' <fresnofinches at aol.com>,
> <detomaso at poca.com>
> Subject:  Re: [DeTomaso] Dynamat Xtreme results - electric motor whine
> 
> On Jul 22, 2013, at 4:55 PM, Larry - Ohio Time Corp wrote:
>> Will,
>> 
>> I am down to my gold fish, Goldie 7 years old, what a gal. Most of my pumps
>> made there noise from there feet (fins?). I placed them on hard foam pad to
>> cut 50% out. If you feel comfortable putting a box over it (heat and air
>> circulation and all) normal foam packing that looks like egg cartons works
>> very well. 
>> 
>> Larry (eats fish now) - Cleveland
>> -----Original Message-----
>> From: detomaso-bounces at poca.com [mailto:detomaso-bounces at poca.com] On Behalf
>> Of Will Kooiman
>> Sent: Monday, July 22, 2013 8:41 AM
>> To: Ken Green; Larry Finch; detomaso at poca.com
>> Subject: Re: [DeTomaso] Dynamat Xtreme results - electric motor whine
>> 
>> Is this the best stuff to muffle electric motor whine?
> No Will, it is not the best, you must combine it with an absorbent
> decoupling layer of rubber, neoprene, foam or rubber mount supports. The
> dynamat must be supported on by sides with the fore mentioned products.You
> need to have the dynamat float in concert with the sound waves while
> absorbing and yet impart none of its vibrations to anything. Just dynamat in
> a box would cause the sound waves to just bounce around, yet it will help
> but not to the level of what I've stated.
> I did this years ago to my E430 and at 151mph, the decibel meter on scale C
> read 81 dB on a concrete Interstate.
> Hope this helps,
> Jeff Cobb
>> 
>> I'm trying to quiet down aquarium pumps.
>> 
>> --
>> Will
>> 
>> On 7/21/13 9:31 PM, "Ken Green" <kenn_green at yahoo.com> wrote:
>> 
>>> Amazon has a good price on this stuff, and orders over $25 ship free:
>>> 
>>> Dynamat 10455 18" x 32" x 0.067" Thick Self-Adhesive Sound Deadener
>>> with Xtreme Bulk Pack, (Set of 9)
>>> 
>>> $139 shipped.
>>> 
>>> Ken
>>> ________________________________
>>> From: Larry Finch <fresnofinches at aol.com>
>>> To: detomaso at poca.com
>>> Sent: Sunday, July 21, 2013 2:51 PM
>>> Subject: [DeTomaso] Dynamat Xtreme results
>>> 
>>> 
>>> All,
>>> 
>>> As you may recall I learned a hard lesson as to what happens when you
>>> fail to fully tighten a heater hose connection after doing an
>>> evaporator upgrade.
>>> 
>>> I have just finished the installation of Dynamat on 2511. Curious as to
>>> just how much it would require to cover the interior and what the added
>>> weight would be, I made detailed before and after records of the weight
>>> of the Dynamat I used.
>>> 
>>> I used Dynamat Xtreme in the bulk packs of 9 sheets, each 18" x 32".
>>> Each sheet is four square feet, and the pack of nine sheets is about
>>> $150 a box on eBay. I bought two boxes, 18 sheets total.
>>> 
>>> I exhibited my typical over-thinking and over-executed technique and
>>> first made poster-board patterns for all the various panel shapes. This
>>> allowed me to optimize waste reduction by trial-and-error placing of
>>> the patterns on each sheet prior to actual cutting. I also installed
>>> all the pieces without overlap, instead placing them edge-to-edge.
>>> I covered ALL the interior: rear firewall and hatch, full floor,
>>> interior rockers, wheel houses, all sides of the center tunnel, front
>>> bulkhead and bottom portions of the cowl.
>>> 
>>> (Yes, I know Dynamat results are pretty good when just covering most of
>>> a panel instead of a full edge-to-edge covering, but its kind of like
>>> 'clocking' the nine screws on the LeCarra steering wheel. Not
>>> necessary, but just something I do.)
>>> 
>>> After this one-layer install, I had just three full sheets and a lot of
>>> scrap remaining. By weight, I've calculated I used roughly 45 square
>>> feet and added about 16.5 pounds of material for that one-layer
>>> install.
>>> 
>>> I then added a second layer to the rear firewall and all sides (F to R)
>>> of the center tunnel. (I did not add a second layer to the hatch as I
>>> have had it CermaKromed at CAPS here in Fresno.)  This took about 15
>>> square feet and added another 5.5 pounds. For most of the second layer,
>>> I was forced to piece smaller scraps together in forming the larger
>>> patterns.
>>> 
>>> In summary, I added only about 22 pounds of weight, covered the full
>>> interior with one layer and covered the main heat-transferring panels
>>> with two layers, and spent about $300. Time spent? Patterns and
>>> installation must have been about 40-60 hours.
>>> 
>>> (Think that is excessive? Don't ask how many hours I spent figuring out
>>> how to adapt and cut a set of Muth signal mirrors to fit into the two
>>> Colt electric mirrors on 2511.)
>>> 
>>> I found the Dynamat very easy to work with. Cuts easily with good
>>> scissors or box knife; a good-sized scrap of plywood serves well for
>>> the long box-knife cuts. Foil covering is VERY durable, flexible and
>>> easily formed to reasonable compound curves. When carefully handled, it
>>> can be repositioned before final press-down installation. I used a 2"
>>> rubber roller for the large surfaces, and the smooth metal handle of an
>>> old butter knife to burnish the inside and outside corners, nooks and
>>> crannies.
>>> 
>>> Next up is the aluminized adhesive-backed radiant heat barrier (COOL IT
>>> by ThermoTec) on the firewall, hatch and center tunnel.
>>> 
>>> Now if I can just get the A/C reliably working......
>>> 
>>> Larry
>>> 
>>> 
>>> 
>>> 
>>> 
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