<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>On my BJ8, I just have "bare" painted floors, and no underfelt. I</div><div id="AppleMailSignature"> just have the factory style fibrous cement heat shields under the floor (with an air gap) and the firewall engine bay ones. </div><div id="AppleMailSignature">I have heat wrapped extractors that have been on the car for 23 years, with a side exhaust, and I don't have any cockpit heat issues. </div><div id="AppleMailSignature">I don't actually understand what issue you men are trying to solve by gluing 20 kg of sound deadening on the floor or an open Sportscar? </div><div id="AppleMailSignature">Keep the heat out first. </div><div id="AppleMailSignature">Out of the car. </div><div id="AppleMailSignature">Sincerely. </div><div id="AppleMailSignature">Chris Dimmock</div><div id="AppleMailSignature">Sydney Australia. </div><div id="AppleMailSignature"><a href="http://www.myaustinhealey.com">www.myaustinhealey.com</a> <br><br><br></div><div><br>On 25 Jan 2019, at 7:59 am, Richard Collins <<a href="mailto:gonnagitcha90@hotmail.com">gonnagitcha90@hotmail.com</a>> wrote:<br><br></div><blockquote type="cite">
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FWIW I used dynamat under my rugs, firewall, and trannie tunnel cover. Rarely drive in the summer due to vapor lock issues in traffic but find neither heat nor noise is an issue.<br>
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<div dir="ltr">Regards,
<div>Richard C</div>
<div>BN7 440</div>
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On Jan 24, 2019, at 1:49 PM, Frank Magnusson <<a href="mailto:fmags@cox.net">fmags@cox.net</a>> wrote:<br>
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<p class="MsoNormal">Yes; you’re right; Dynaliner is their best product for thermal issues.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>From:</b> <a href="mailto:warthodson@aol.com">warthodson@aol.com</a> <<a href="mailto:warthodson@aol.com">warthodson@aol.com</a>>
<br>
<b>Sent:</b> Thursday, January 24, 2019 10:17 AM<br>
<b>To:</b> <a href="mailto:fmags@cox.net">fmags@cox.net</a>; <a href="mailto:healeys@autox.team.net">
healeys@autox.team.net</a><br>
<b>Subject:</b> Re: [Healeys] Engine running smoothly, now to install the interior<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">When I was restoring my BJ8 (about 6-8 years ago) I tried to compare various thermal insulation efficiencies. I.E. "R" values. My primary concern was heat not sound.
Many of the sources made it nearly impossible because they do not publish this information. I just looked at Dynamat's website & in a quick search could not find any "R" value information. However, I did notice that they seem to be saying Dynamat is primarily
for sound insulation & their Dynaliner is primarily for thermal insulation. Remember that
<b>anything</b> you put between the heat source & the cockpit will act as an insulator. But some things will be better at it than other things. Dynaliner is a closed cell (air spaces) rubber material. That sounds similar to neoprene to me. By the way, it is
the small air spaces that do most of the insulating, not the rubber.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">R values are often stated as btuh/inch. So, if something has an R value of 8 btu/inch & the material is 1/2" thick it will actually have an R of 4. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">This is primarily discussing conduction. Heat is transferred by conduction, convection & radiation. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">The insulation in a Healey will have to be able to withstand relatively high temperatures, perhaps water & possibly some abrasion. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">I am trying to point out that Dynamat appears to not be the best way to reduce heat if that is your goal & there is very limited space available for good thermal
insulation so use the best available after you figure out what that is. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Gary Hodson<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">-----Original Message-----<br>
From: Frank Magnusson <<a href="mailto:fmags@cox.net">fmags@cox.net</a>><br>
To: healeys <<a href="mailto:healeys@autox.team.net">healeys@autox.team.net</a>><br>
Sent: Wed, Jan 23, 2019 5:07 pm<br>
Subject: Re: [Healeys] Engine running smoothly, now to install the interior<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Bob,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Agree with other posts about replacing grommets, and sealing any gaps you find in the engine bay. Any opening will let heat in of course.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">I didn’t use any caulking when I installed the tunnel; just the factory seals for the tunnel IIRC; But, it’s been awhile…<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">As far as heat insulation, I used a product called Refletix; can’t say it reduced the heat any or not; it’s still hot in the footwell. I think if I were doing it
today, I’d use Dynamat. I just put some in another vehicle as sound insulation and it works great for that and is supposed to reduce heat as well. I put the Refletix on the gearbox side of the tunnel as it’s rather thick, but I think I’d put Dynamat on the
inside. It’s very thin (but heavy), so I don’t think it would make the carpet look too thick. Not cheap, though. Alot of the custom car shops use it; Foose, Kindigit, etc.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">BTW, Dynamat does make an entire kit for one of the big Healey’s; Don’t recall which one, but its on their website and should be a custom fit. Should work on all
big Healey’s I would think.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">I need to pull my tunnel off as well to replace the gearshift boot; may put some Dynamat in there as long as I have it off.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Hope this helps,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Frank<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">’65 BJ8<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><Now I am ready to install the interior with new heat insulation. What is the recommended caulking compound to use when installing the tunnel? Is it recommended
to install heat insulation on the transmission side of the tunnel. If so, what to use, for example heavy duty 3M spray or?><o:p></o:p></span></p>
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