ElpacoSV
Senior Member
Love the hypothesis to use air as a thermal ressistance. After all air has a low conductivity. You might be right.The fact there is an air cavity around the inlet pipe could mean that it's there to simply provide a heat buffer for the hottest part of the inlet surround... There are easier/better ways to do it, but it also doubles as a nice under engine 'style' feature.... so maybe that's all it is.
That said - there's a fair bit of extra mass there that given the designer intentions (track ready) seem unlikely to be anything but functional... but who knows.
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