sixshooter

iTrader: (12)

Downpipe heat shield picture attached. I decided to use standard gear clamps to retain the shield for ease of installation and future removal. An air gap was retained between the pipe and shield to facilitate air movement.

The material is an aluminum factory shield used to protect a plastic fuel tank from exhaust heat on some type of minivan or truck I found at the junkyard. It was about 36"x12" and mostly flat with some ribs for air gap. I cut it to size and bent it around the downpipe. What you see is all one piece, split and trimmed to make the bend. It is tight and doesn't rattle or buzz.

Same thing was done on next piece of exhaust running beside the trans. The exhaust is 3 inch.

m2cupcar

iTrader: (5)

Is that piece two sheets of aluminum with something (fiberglass/ceramic) sandwiched in between? Has potential as a turbine/downpipe heat shield?

sixshooter

iTrader: (12)

The pipe is wrapped with header wrap and the aluminum is double layer heat shield removed from a vehicle at the junkyard. It was OEM for protecting a poly fuel tank from exhaust heat in a minivan or something. I cut it to size and clamped it on. -Cheap, simple, effective

hraday93

Any more word on the smokiness from the Amazon part? sixshooter, really digging the diy junkyard option. definitely adding that to my shopping list for a junkyard haul later on in the year.

brainzata

iTrader: (4)

https://www.amazon.com/gp/aw/d/B000P...KUL&ref=plSrch

For one of my heat defeating ideas I bought this ^.
Cut a piece, wrapped it around my transmission with the reflective side facing outwards. I purchase rivet type button snaps and installed a few along the edges. Creating a removable blanket around the transmission. My idea was the whole tunnel gets heat soaked, and this would help(assumed) lower the heat soaking of the transmission case. Also protecting the direct heat radiation from the exhaust to the case. Takes of minimal space, has air space in between the blanket and case for a good amount of the coverage. Using my super science skills, touching the case under the blanket felt cooler than the exposed areas.

sixshooter

iTrader: (12)

I see it more as an issue of 1000 degree exhaust heating everything in a direct line of sight (because that's how radiant heat works ). The transmission will reach about 200 degrees from combination of being connected to 200 degree engine and friction due to operation. It needs a little airflow over it to shed excess heat created by doing work, I would imagine, but the primary offender is the exhaust. Once the exhaust is isolated much of the trouble is gone.

On a related note, one of our brethren was discussing a problem with the pressurization and occasional boiling of fuel in his tank. I once had this problem as well. It turns out that the exhaust passes within a couple of inches of the bottom of the fuel tank. Once shielded, the problem was quelled. I hate to think I was blind to the cause of the issue for so long.

m2cupcar

iTrader: (5)

I bought one of these in anticipation of the day my ceramiglass downpipe wrap disintegrates. It's for real and looks to be a good fit for a 3" downpipe either stainless strapped or offset with an air gap. $25 delivered was the right price IMO. There are four left as of this post.

Heat Shield for Exhaust Diesel Turbo Downpipe Military Thermal Wrap | eBay