Adding heat protection to hood

[rmaynard 15,715]

I am restoring a B-100. I have noticed on my hood and all of the other three hoods that I have, that the area on the hood adjacent to the muffler, is always heat damaged. The damage amounts to warping of the sheet metal, burning of the paint on the inside and darkening on the outside. Also, the area of the hood directly above the exhaust elbow coming from the head is also affected. These areas are then prone to rust. Of course my entire horse is rust, but that is beside the point.

Has anyone ever experimented with applying a laminated foil insulation to the inside of the hood? This is the type of insulation that is often found on the firewall of some cars and trucks.

Or, if you have any other ideas of how to shield the muffler, let me know.

Bob

[rickv1957 72]

Bob,dont they make a heat sheilding wrap like the drag racers use?,Rick

[rmaynard 15,715]

I haven't checked, but I imagine they do. Don't know if it would be affordable for me though.

Bob

[TT-(Moderator) 1,145]

Something like this, maybe?:

http://www.autobarn.net/thalheba.html

[rmaynard 15,715]

That is exactly what I'm talking about Terry.

Now the questions is, has anyone used it? Does it do what it is intended to do. How does it hold up in weather conditions such as snow/rain etc?

So many questions.

Thanks TT

Bob

[clintonnut 126]

You can buy header wrap from a garden tractor pulling site. It costs about $30 but is enough to do the whole pipe.

Charlie

[Sarge 3,464]

Header wrap works great to move the heat away from the area where it's wrapped. However, there are drawbacks such as rust, any type of wrap will accelerate corrosion in a hurry. Better solution is to form a heat shield from tin and use some short pieces of rod to stand it away from the pipe . Generally, the shields I've built are only around 1/8" away from the pipe and will still stay cool enough to touch under a full load.

Sarge

[rickv1957 72]

Sarge,maybe like the shields on a D series?,Rick

[Sarge 3,464]

To that effect, yes .

Nothing more than a simple piece of tin . Spot weld a few 1/4" long standoff pieces of round 3/16" rod stock to the muffler , mark and drill corresponding holes in the tin for spot welds to hold it to the rods. Nearly no heat transfer between the two pieces and the air gap keeps everything pretty cool on the outside.

Sarge