Quote:
Originally Posted by elhigh
Wrapping your exhaust headers to the snail is more about making the most power possible, it helps ensure that there is more energy in the exhaust stream to spin up the turbo, none of it lost into the engine bay.
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Can you explain on this?
A turbo works by the exhaust gasses passing across the turbine which allows it to spool up. If heat is lost through the transfer of the metal, the pressure would still be there to spool the turbo. So unless you have holes in your exhaust manifold wrapping them would not help spin the turbo. The wrap for the turbo is to keep heat out of the engine bay away from the cool air going to the intake side of the turbo which heats up through heat transfer anyway.