High temperatures can not only lead to power loss, they can also damage other peripheral parts, especially in the long term in the engine compartment.
The turbo heat protective coats are available from as little as € 100 up to € 200 and are expected to reduce the temperature at the turbo exhaust housing as well as in the entire engine compartment, as well as increase performance.
In the following video, it is well explained how a heat protection jacket works, what effects it has and whether it actually keeps what it promises.
Rob's video shows that although the engine block temperature remains the same, there was no major increase in turbo temperature.
Another informative video from "Poor Man" shows a comparison of the single setup with and without a heat protection jacket. He has measured only a small effect with the coat.
Without a blanket | With blanket
Upper bonnet: 177 | 130
Turbine: 455 | 230
Downpipe: 450 | 455
Compressor: 186 | 185
Firewall: 127 | 120
In conclusion, although the effects of turbo coverage in terms of performance enhancement are rather low, they have quite positive effects in terms of thermal reduction in the engine compartment.
Gas expands in the heat and so the isolated heat on the exhaust side can slightly increase the boost pressure on the compressor side. The same was also evidenced by Super Street magazine and a study by the University of Texas at Austin. Both of these tests show a small increase in spooling through the use of a turbo heat shield. It can not be wrong to use one.
Other opinion, however, one is at the complete insulation of the manifold. This can lead in the long term to breaks in the manifold due to uneven insulation.
What do you mean especially in the last point?
