Quote:
Originally Posted by pbonsalb
These are tiny turbos. Yes, turbines are hotter than cats, but the cats are absolutely massive compared to the turbines and are also hot (not as hot but still hot). Covering, wrapping, coating them will do more than putting turbine housing wraps on the turbos.
As for faster spool or improved throttle response, I think it is probably more something you would like to have resulted from all the work rather than anything measurable. These are tiny turbos are super responsive. Retaining the heat in them won’t have anything remotely like the effect of retaining the heat in a big slow lazy turbo. I did not perceive any difference. Install catless secondaries and you will notice something. Install high flow cat or catless primaries and you will notice something. Install both and you will notice even more.
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This. All of this.
Airflow > insulation will always be the winner, and significantly improved airflow will actually deliver lower overall operating temps as the heat is exhausted from the engine/turbos/engine bay faster.