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When I was restoring my BJ8 (about 6-8 years ago) I tried to compare variou=
s 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do not publish this information.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 notic=
e that they seem to be saying Dynamat is primarily for sound insulation & t=
heir Dynaliner is primarily for thermal insulation. Remember that anything =
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. B=
y the way, it is the small air spaces that do most of the insulating, not t=
he rubber.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.=C2=A0This is primarily discussing conduction. Heat is transferred b=
y conduction, convection & radiation.=C2=A0The insulation in a Healey will =
have to be able to withstand relatively high temperatures, perhaps water & =
possibly some abrasion.=C2=A0I 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 availab=
le after you figure out what that is.=C2=A0Gary Hodson
-----Original Message-----
From: Frank Magnusson <fmags@cox.net>
To: healeys <healeys@autox.team.net>
Sent: Wed, Jan 23, 2019 5:07 pm
Subject: Re: [Healeys] Engine running smoothly, now to install the interior
#yiv1297619435 #yiv1297619435 #yiv1297619435 -- filtered {panose-1:2 4 5 3 =
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1297619435 #yiv1297619435 Bob, =C2=A0Agree with other posts about replacing=
grommets, and sealing any gaps you find in the engine bay.=C2=A0 Any openi=
ng will let heat in of course. =C2=A0I didn=E2=80=99t use any caulking when=
I installed the tunnel; just the factory seals for the tunnel IIRC; But, i=
t=E2=80=99s been awhile=E2=80=A6 =C2=A0As far as heat insulation, I used a =
product called Refletix; can=E2=80=99t say it reduced the heat any or not; =
it=E2=80=99s still hot in the footwell.=C2=A0 I think if I were doing it to=
day, I=E2=80=99d use Dynamat.=C2=A0 I just put some in another vehicle as s=
ound insulation and it works great for that and is supposed to reduce heat =
as well.=C2=A0 I put the Refletix on the gearbox side of the tunnel as it=
=E2=80=99s rather thick, but I think I=E2=80=99d put Dynamat on the inside.=
=C2=A0 It=E2=80=99s very thin (but heavy), so I don=E2=80=99t think it woul=
d make the=C2=A0 carpet look too thick.=C2=A0 Not cheap, though.=C2=A0 =C2=
=A0Alot of the custom car shops use it; Foose, Kindigit, etc. =C2=A0BTW, Dy=
namat does make an entire kit for one of the big Healey=E2=80=99s; Don=E2=
=80=99t recall which one, but its on their website and should be a custom f=
it.=C2=A0 Should work on all big Healey=E2=80=99s I would think. =C2=A0I ne=
ed to pull my tunnel off as well to replace the gearshift boot; may put som=
e Dynamat in there as long as I have it off. =C2=A0Hope this helps,Frank=E2=
=80=9965 BJ8 =C2=A0<Now I am ready to install the interior with new heat in=
sulation.=C2=A0 What is the recommended caulking compound to use when insta=
lling the tunnel?=C2=A0 Is it recommended to install heat insulation on the=
transmission side of the tunnel.=C2=A0 If so, what to use, for example hea=
vy duty 3M spray or?> =C2=A0
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------=_Part_534178_1083396426.1548346598671
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<font color=3D'black' size=3D'2' face=3D'arial'>
<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black">
<div id=3D"yiv1297619435">
<div><font color=3D"black" face=3D"arial" size=3D"2">
</font>
<div>When I was restoring my BJ8 (about 6-8 years ago) I tried to compare v=
arious 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 &a=
mp; 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 insul=
ation & their Dynaliner is primarily for thermal insulation. Remember t=
hat <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 simi=
lar to neoprene to me. By the way, it is the small air spaces that do most =
of the insulating, not the rubber.</div>
<div>R values are often stated as btuh/inch. So, if something has an R valu=
e of 8 btu/inch & the material is 1/2" thick it will actually have an R=
of 4. </div>
<div>This is primarily discussing conduction. Heat is transferred by conduc=
tion, convection & radiation. </div>
<div>The insulation in a Healey will have to be able to withstand relativel=
y high temperatures, perhaps water & possibly some abrasion. </div=
>
<div>I am trying to point out that Dynamat appears to not be the best way t=
o reduce heat if that is your goal & there is very limited space availa=
ble for good thermal insulation so use the best available after you figure =
out what that is. </div>
<div>Gary Hodson</div>
<div><br clear=3D"none">
</div>
<div><br clear=3D"none">
</div>
<br clear=3D"none">
<div style=3D"font-family:arial, helvetica;font-size:10pt;color:black;">---=
--Original Message-----<br clear=3D"none">
From: Frank Magnusson <fmags@cox.net><br clear=3D"none">
To: healeys <healeys@autox.team.net><br clear=3D"none">
Sent: Wed, Jan 23, 2019 5:07 pm<br clear=3D"none">
Subject: Re: [Healeys] Engine running smoothly, now to install the interior=
<br clear=3D"none">
<br clear=3D"none">
<div class=3D"yiv1297619435yqt5376222726" id=3D"yiv1297619435yqt59580">
<div id=3D"yiv1297619435"><style>#yiv1297619435 #yiv1297619435 #yiv12976194=
35 -- filtered {panose-1:2 4 5 3 5 4 6 3 2 4;}#yiv1297619435 filtered =
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#yiv1297619435 </style>
<div>
<div class=3D"yiv1297619435WordSection1">
<div class=3D"yiv1297619435MsoPlainText">Bob,</div>
<div class=3D"yiv1297619435MsoPlainText"> </div>
<div class=3D"yiv1297619435MsoPlainText">Agree with other posts about repla=
cing grommets, and sealing any gaps you find in the engine bay. Any o=
pening will let heat in of course.</div>
<div class=3D"yiv1297619435MsoPlainText"> </div>
<div class=3D"yiv1297619435MsoPlainText">I didn=E2=80=99t use any caulking =
when I installed the tunnel; just the factory seals for the tunnel IIRC; Bu=
t, it=E2=80=99s been awhile=E2=80=A6</div>
<div class=3D"yiv1297619435MsoPlainText"> </div>
<div class=3D"yiv1297619435MsoPlainText">As far as heat insulation, I used =
a product called Refletix; can=E2=80=99t say it reduced the heat any or not=
; it=E2=80=99s still hot in the footwell. I think if I were doing it =
today, I=E2=80=99d use Dynamat. I just put some in another vehicle as=
sound insulation and it works great for that and is supposed to reduce hea=
t as well. I put the Refletix on the gearbox side of the tunnel as it=
=E2=80=99s rather thick, but I think I=E2=80=99d put Dynamat on the inside.=
It=E2=80=99s very thin (but heavy), so I don=E2=80=99t think it woul=
d make the carpet look too thick. Not cheap, though. &nbs=
p;Alot of the custom car shops use it; Foose, Kindigit, etc.</div>
<div class=3D"yiv1297619435MsoPlainText"> </div>
<div class=3D"yiv1297619435MsoPlainText">BTW, Dynamat does make an entire k=
it for one of the big Healey=E2=80=99s; Don=E2=80=99t recall which one, but=
its on their website and should be a custom fit. Should work on all =
big Healey=E2=80=99s I would think.</div>
<div class=3D"yiv1297619435MsoPlainText"> </div>
<div class=3D"yiv1297619435MsoPlainText">I need to pull my tunnel off as we=
ll to replace the gearshift boot; may put some Dynamat in there as long as =
I have it off.</div>
<div class=3D"yiv1297619435MsoPlainText"> </div>
<div class=3D"yiv1297619435MsoPlainText">Hope this helps,</div>
<div class=3D"yiv1297619435MsoPlainText">Frank</div>
<div class=3D"yiv1297619435MsoPlainText">=E2=80=9965 BJ8</div>
<div class=3D"yiv1297619435MsoPlainText"> </div>
<div class=3D"yiv1297619435MsoPlainText"><Now I am ready to install the =
interior with new heat insulation. What is the recommended caulking c=
ompound to use when installing the tunnel? Is it recommended to insta=
ll heat insulation on the transmission side of the tunnel. If so, wha=
t to use, for example heavy duty 3M spray or?></div>
<div class=3D"yiv1297619435MsoNormal"> </div>
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