Exhaust pipe wrap

What is the general consensus of Rotax 912 ULS operators about wrapping the exhaust pipes with

"automotive exhaust manifold tape" to reduce the under cowl temps... looking for ways to get rid of heat to reduce my oil temp slightly on high ambient OAT days.

What did you see or experience

What product and from which source did you use

Any other caveats

Still grinnin

Phil Smith CH 70wonderful

Buhl, ID

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Permalink Reply by Kevin Beriault on March 1, 2021 at 10:19pm

i use if for two reasons , firstly it helps keep my cowling temperature down after a flight to prevent vapor lock and secondly to protect the lower cowling itself from damage .. it works very well

Kevin

Permalink Reply by Neil Cooper on November 19, 2021 at 4:24pm

I have to same problem.

first I got stainless pipes made. Then got ceramic coated. Didn’t make a scrap of difference. Waste of money (getting ceramic)

I know wrapping will eventually make the pipes break down earlier but I accept that I will have to have new stainless pipes made when that time comes. Wrapping my exhaust pipes gave much cooler temps under the cowl. I monitor the temps. If they start rising again I will re wrap as required. Has lasted a long time now tho. The heat under the cowl affected both my oil and coolant temps due to the tight cowl set up. I use 1/3 pre mix coolant which has better thermal transfer. Wrap on its own though, brought temps down on both by 10°C

left photo is original temps. Middle is with wrap,right is with 1/3 coolant mix

make sure you use a good titaniaum wrap. No cheap stuff.

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