Rotary Turbos and Turbo bags!

[silverfdturbo6port]

I've used bags and wrap n street machines for many many years with no issues. Even with drag racing, autocross and numerous 180+mph pulls on 100* days I've never seen them "BDC" nor myself turn into a "KUUNT" but those are not harsh conditions like a race car as stated by Peter.
But for a dedicated "Race" car I will guarantee you will see the effects like in the OP.
But for daily driving/street use and you want to keep the bay temps down then Bags, wrap, shielding, heat coatings all work great.

[RICE RACING]

Originally Posted by silverfdturbo6port

I've used bags and wrap n street machines for many many years with no issues. Even with drag racing, autocross and numerous 180+mph pulls on 100* days I've never seen them "BDC" nor myself turn into a "KUUNT" but those are not harsh conditions like a race car as stated by Peter.
But for a dedicated "Race" car I will guarantee you will see the effects like in the OP.
But for daily driving/street use and you want to keep the bay temps down then Bags, wrap, shielding, heat coatings all work great.

It's a function of power, restriction, retained heat, time used at high power.
Anyone familiar with FD3S twin turbo systems who has used them at high power (1.5bar boost @ ~400bhp or so) and over a huge length of time (say 50,000km+) will attest to the similar degradation of manifolds and turbine housings (non insulated!)

If you are making lower power, use it less frequently, have larger housings, turbo's etc all of this simply means you have less if ever any likely hood of seeing such things

*If you are making the power (with associated heat input!)
*Use it often and at high duration
*Even on a T4 platform with the biggest housing you can run and super low restriction outlet *see proven tests* you will fuck the housing if you insulate it... proven.