tune pipe tempture hot or cold

mark gordon · May 20, 2016

Hi all can anyone explain the difference on running a pipe hot compared to a pipe that is running cool , which is better hot or cool.

Does a black painted pipe perform better than a polished pipe ?

thanks in advance

moparbarn · May 21, 2016

I have no way to prove it, but common theory is a hot exhaust pipe/gas's flow better. I have a Cooper OB pipe I had powder coated black, & it performs better than it did uncoated. All "seat of the pants", but I say hot is better.

Ray Sametz · May 21, 2016

Some porcelain library reading by Roy Bacon.

lohring · May 21, 2016

Pipe temperature determines the perceived pipe length. Low temperature makes the pipe act longer. You can use water injection at the header to achieve this, see below. This allows a short SAW pipe to give high power in the lower rpm area for acceleration. The effect will be smaller with a nitro engine pipe because the exhaust gas temperature is much lower than in a gasoline engine. Keeping heat in a pipe should otherwise be a good thing if the pipe is designed for that temperature.

Lohring Miller

mark gordon · May 21, 2016

Thanks everyone

tune pipe tempture hot or cold

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tune pipe tempture hot or cold

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