Quote:
Originally Posted by matto20v
See, I read that trapping the heat in the exhaust, and preventing it from dissipating, is bad.
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nick73 is correct.
The heat energy in the exhaust is what drives the turbo. The gas is hot and compressed, there is only one way it can expand- thru the turbo. The hotter the better. After the turbo however, do not wrap or coat. If the pipe after the turbo is kept hot, the exhaust gases will not cool and contract and will reduce flow thru the turbo.
I am told that some race cars do have heat wrapped exhaust pipes, the reason is to keep heat away from fuel tanks.