Part 18 – Heat Shielding

[RJacobsen]

The next item on the list is to add the firewall/foot-box heat shields. I have a portable sheet metal brake, so I was able to make my own panels. I also wanted to have an air gap between the foot-box sides and the aluminum heat shields, so I fabricated some non-metallic standoff mounts from a fiberglass sledgehammer handle. I’ll let the pictures tell the rest of the story.

http://www.uniquecobra.com/gallery/files/1/5/0/5/heatshieldaluminum1.JPG


http://www.uniquecobra.com/gallery/files/1/5/0/5/heatshieldaluminum.JPG


http://www.uniquecobra.com/gallery/files/1/5/0/5/heatshieldaluminum2.JPG


http://www.uniquecobra.com/gallery/files/1/5/0/5/heatshieldaluminum3.JPG


http://www.uniquecobra.com/gallery/files/1/5/0/5/heatshieldaluminum4.JPG


http://www.uniquecobra.com/gallery/files/1/5/0/5/heatshieldaluminum5.JPG


To be continued…

[pgermond]

Real nice, Rod. First rate [thumb] I used insulation and stand-offs as well...... but a word of caution, especially for big blocks cars - I was patting myself on the back for the air-cap idea when I realized I really caused myself a problem with workable space between the footbox and the exhaust manifold. Probably not a big deal with a SB.... but definitely an issue with a BB.

[RJacobsen]

I was patting myself on the back for the air-cap idea when I realized I really caused myself a problem with workable space between the footbox and the exhaust manifold. Probably not a big deal with a SB.... but definitely an issue with a BB.

I should have mentioned that Phil, with the 289 I have plenty of room to work with.

[Aggressor]

Really nice work Rod. Your workmanship is stellar.

I was glad to see the term 289 show up in the forum dialog. You would be hard pressed to "dimple" BB headers enough for clearance.

Once again: Just nice ....... exceedingly nice!!

-Geary

[Slither]

Very sweet[thumb]! What size space did you leave?

I notice a large opening in the driver's side top panel, and an interesting looking pedal mount, maybe? You holding out on us;)!?? New thread on that please...

Nice work:D!

[diegokid]

On the front of the drivers footbox did you use spacers to keep the master cylinders from "crushing" the panel with the air gap?

[RJacobsen]

On the front of the drivers footbox did you use spacers to keep the master cylinders from "crushing" the panel with the air gap?

I left a 1/2" air gap behind the aluminum. The master cylinders are not going to mount on the front of the foot box. More on that later ;)

[Slither]

The master cylinders are not going to mount on the front of the foot box. More on that later ;)


Oh the suspense....;)!

[mkassab]

I'm new to the Cobra world and this forum. I'll be at the May 14th Homecoming to look at all the Cobra's and work my order details with the Weaver's. I'm a big planner and therefore why I'm looking for all the build tips I can. In this "Heat Shield" post, did you consider LizardSkins Sound and Ceramic heat coating? If so, any opinions of the product? From my research, looks like the sound coating would be sprayed on the body surfaces and the ceramic heat sprayed on the back of the aluminum. Any help here much appreciated. Thanks Mark

[RJacobsen]

I did not consider Lizard Skin but it looks like it would do a great job. One of their vidios showed the product sanded, filled and painted so you would not need the aluminum shield. I was able to fabricate all the pieces myself so my cost is very low in comparison, also I'm running a small block so the extra room in the engine compartment translates to less heat to control.

[mkassab]

Another thought on heat shielding that I'll be doing in addition to everything else. I'll ceramic coat the headers and then wrap them with header tape wrap. Many benefits come from this, but the top two are, 1) Heat to drop in the engine compartment by up to 70% and 2) with the heat staying within the header, thereby keeping the exhaust gas hotter, flow restriction decreases. Both 1 & 2 contribute to more HP.... always a good thing. [thumb]

[weaver]

The problem with header wrap is it holds moisture, I have replaced several sets of headers over the years that were wrapped, they literally fell apart after a few years. If you ceramic coat your exhaust and use Thermo tec heat insulation under your carpet you will not have a heat problem.

Alan

[mkassab]

Alan... hmmmm good point. Let me ask thought... if I ceramic coat first then wrap.... would I still have the rust problem? i.e, isn't the ceramic coat waterproof?

[mkassab]

Rod.... here's an excellent product for all your aluminum work to keep it looking new.... http://www.sharkhide.com just wipe on.