Minimum Dynamat

[another69]

I just bought a 36 sq ft pack of Dynamat extreme and its got some weight! I really want to minimize how much I put on my 1st gen due to weight & the fact that my floor is new. I hate to stick anything to it, I spent such a long time getting it nice that I even thought of running it bare. Anyway, I really want to put the bare minimum down to reduce drivetrain heat. I was going to cover the firewall, front footwells, and part of the tunnel right over the trans. Then I think I will go with Dynaliner over the whole tunnel. Any ideas as to the most critical areas to put this stuff? I will be using new carpet (OER I guess) with the jute padding. I'm using DEI heat shield between the mufflers & floor. Last summer with no heat shield or Dynamat, but with the jute, it was pretty hot & noisy.

[rocketrod]

I understand how you feel about everything being new, but cover the entire interior floor pan, from the top of the firewall the rear package tray. Also cover behind the door panels, door skins and roof. You will be amazed at how much quieter it is and cooler. I also put a layer on the underside of the floorpan above the transmission.

[another69]

I really want to use the minimum, and the heat is worse than the noise, so I want to only cover the critical areas. I am constantly making changes, so I don't want to cover the whole floor. I would if Dynamat wasn't so heavy and permanent. I thought if I did the front and maybe the rear package tray it should help, because there is really not much radiant heat in the middle of the car, except for the exhaust, which runs really close to the tunnel. The tunnel will be covered with the Dynaliner. I want to leave the rest alone, except for whatever jute padding comes on the new carpet. I just don't know if this will be enough. What do you think? I am really weight conscious, and I really hate to add dead weight.

BTW- Any suggestions on a good brand of carpet?

[bobcat68]

You could use some Thermal block from second skin under the car.

[another69]

I am using some self adhesive aluminum heat shields from DEI above the mufflers, and I am going to try and squeeze some between the headers and floor as well. It looks a lot like the stuff you see OEMs use, and I hope that it also helps. I am tempted to wrap my exhaust pipes- I bet that might help with the heat, but I've never seen anything other than headers wrapped.

[RobNoLimit]

Cut the mat into 1" wide strips, space them 4" apart. You'll get the same sound deadening with 20% of the weight. Header wrap is a good idea for heat, on my newest project truck, I wrapped the pipes to the back of the cab, and have no heat coming through the tunnel. - nice. The downside is that wrapping the exhaust will shorten the lifespan, especially on the headers. Ceramic coaing helps for sure. I usually send the headers and tubes off to Jet-Hot to be coated in and out, then wrap them, the lifespan is then 6 to 8 yrs of hard running and driving on a regular basis.

[another69]

Thanks Rob- I will try cutting the Dynamat into strips, I've never heard of that being done. Does Dynamat help at all with heat, or is it more for noise? If its more for noise, than wrapping the exhaust makes more sense, as it seems that it would kill the heat at the source. I won't wrap the headers now, only because they would be too much of a pain to remove and wrap, I'll just leave the ceramic coating alone. I will wrap the exhaust though, I can deal with a shorter exhaust lifespan. If the Dynamat does not help much with heat, than covering the whole floor or firewall would be a waste of money, not to mention weight.

[Chevy Kid]

Dynamat is more for noise, Dynaliner more for heat. That's why they want you to use both. If you look at the precut kits, there are gaps all over. The Dynamat people say 100% coverage is overkill.

[rallystyle]

not sure how well this works. i should help keep temps down and help the life of your headers

http://www.eastwood.com/ew-hi-temp-i...ension-tu.html