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Originally Posted by nrg
steve shadows, the reason for heatwraps isn't to keep engine bay temps down. it's to keep the temp inside the manifold to the turbo.
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Exactly, it keeps thermal energy of exhaust gases from dissipateing through convection, hence more energy to spool your turbo which means better response and better low end torque
cause the energy to power the turbo comes from the thermal energy and not the pressure differential between the exhaust gas and the atmosphere