Installing heat shielding

[Mike Garrett]

It seems to me that installing a heat shielding in the foot boxes would be easier to do as I am installing the foot boxes rather than to wait until all of the aluminum is installed. Ideas?

[GoDadGo]

Mike,

I made heat shields and they work great.
I also put some insulation behind them, hidden of course, and my feet stay quite cool.
At this time I have not insulated the inside of the foot boxes, but plan to once the body comes off for paint.
Shown below in this old video are the heat shields so I hope this helps.

https://youtu.be/_wnHDNgnNqs

Good Luck From The Dark Dart Side!

Steve

[phileas_fogg]

You are correct; it's MUCH easier to insulate the panels before you install them. Likewise the carpet piece that covers the inside edges of the foot boxes and the "horseshoe" over the transmission tunnel (just be sure to account for all your wiring, like for seat heaters). Also, leave the outside foot box panels off for as long as you can. It's amazing how often you'll want that extra access.


John

https://live.staticflickr.com/4481/37941146946_74c43b46a3_4k.jpg (https://flic.kr/p/ZNJi8Y)IMG_4178 (https://flic.kr/p/ZNJi8Y) by jhsitton (https://www.flickr.com/photos/91016165@N07/), on Flickr

[MPTech]

I posted some pics of my aluminum panels and Stainless Steel heat shields here: Sheet Metal Stencils (https://thefactoryfiveforum.com/showthread.php?35416-Sheet-Metal-Stencils&p=404519&viewfull=1#post404519)

I installed Rivnuts from the inside of the FBs to use the backsides as stand-off (air gap). Worked great!

[boat737]

I made some aluminum 'air gap' panels also. I used hi-temp silicone rubber grommets/washers in the stand-offs to avoid fatigue cracking in the aluminum.

Probably the best thing you can do to mitigate heat from the headers.

[Bob Brandle]

Mike,
For what it's worth, even though it's a Gen 3 Coupe, it should still be applicable for a roadster, here's a photo of my in process engine bay with heat shields mounted around two sides of the foot boxes.
I designed and fabricated aluminum sheet metal pieces (.063 typ), affixed DEI Floor & Tunnel Shield II Insulation and mounted them to the foot boxes with 3/16 alum. standoffs held in place by Rivnuts. I should have mounted the Rivnuts "backwards" like MPTech did and eliminate the standoffs, great idea! While I know that the heat shielding by the alum panels combined with the air gap between the alum. panels and the footbox sheet metal are the keys, I like the look of the DEI Shield II material and just went for the slight overkill. I'll also mount more of the DEI Shield II sheets from the rear edge of the heat shield panel back onto at least half the length of the transmission tunnel.
Prior to mounting the foot box sheet metal pieces to the chassis, I mounted on the cockpit side a layer of Second Skin Sound Damplifier Pro sheeting, then two layers of 1/8" thick Dynamat Dynaliner (I bought the 1/8" thk, but should have bought 1/4") and lastly the black carpeting. It's so much easier to install these onto the un-mounted sheet metal pieces than when they're all mounted to the chassis.

Bob

https://thefactoryfiveforum.com/attachment.php?attachmentid=126049&d=1586542454

[Ducky2009]

I too installed air gap / heat shields. Installed using rivetnuts and bolted on from the engine compartment, using nylon spacers from the hardware store. No signs of over heating and melting so far. The PS wraps around the footbox. Not enough to do that on the DS.

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[edwardb]

It's not nuclear fission going on underhood there guys. I'm amazed at the creativity some builders show with this subject. I've done four builds with only insulation materials on the inside, along with carpet, and with all air infiltration blocked (very important and often overlooked) have never had a cockpit heat issue. Never even felt it. Other multiple builders will tell you the same thing. Some add ventilation, which I've done too and it doesn't hurt. But still no heat off the actual cockpit walls.

[Mike Garrett]

Thanks, your build looks great!

[Avalanche325]

It's not nuclear fission going on underhood there guys.

LOL!

Not a fan of power adders?
126543

[rich grsc]

It's not nuclear fission going on underhood there guys. I'm amazed at the creativity some builders show with this subject. I've done four builds with only insulation materials on the inside, along with carpet, and with all air infiltration blocked (very important and often overlooked) have never had a cockpit heat issue. Never even felt it. Other multiple builders will tell you the same thing. Some add ventilation, which I've done too and it doesn't hurt. But still no heat off the actual cockpit walls.

There is so much air moving around the engine compartment the panels just don't get hot enough to transfer heat. It's the the hot air infiltration that causes all the problems.

[BradCraig]

I just installed my Dynamat, the only panels I "pre-installed" were the top of the DS footbox. Everything else I just made paper stencils to cut out. The footbox panels can be a PIA to install with how tight the area is and the frame obstructions, so an easier way to approach is to cut those in half and install in pieces. Stuff is so sticky....