Originally Posted by apkano
To be more specific......CC's and mufflers have a little looser dimensional tolerances than a turbo with a rotating assembly. I didn't say they would crack....but I wonder about bearings, fatigue fractures, and fittings. I work with welding and metallurgy 7 days a week........I know what happens when hot metal gets quenched with cold slushy water.
Understood, the point I was making was that the turbo is located
after both sets of cats so heat is absorbed/dissipated by them so the amount of heat that the turbo would see is nothing near that of an engine bay mounted one. If anything the bearings would last longer due to the lower temps. Plus the constant airflow (while driving) underneath the car would cool it as well.
One thing though for anyone interested in this type of system is that the turbo needs to be supported by some type of bracing or crossmember because those puppies are pretty heavy.