Early on there were images (on the forum) of heat damage to the SP wires, that is what started the coil heat shield mod (in my opinion). Having something between the radiating heat of the turbo and the wires just seemed to make sense. (I also trimmed the hood scoop insert inner walls to free up some additional air flow)
When big wheels were installed in the TD05 cartridge the S3 turbine oil slinger grooves were heavily coked from heat soak and poor oil (rotella syn), so I removed the upper and lower turbo heat shields for a quicker cool down and since ran only German/Belguim Castrol (group 5 syn). Years later the TD06SL2r 11 blade turbine was pulled for a higher flowing 9 blade version. The oil slinger grooves were quite clean...I thing the heat shield delete and improved oil helped.
The coil heat shield is shaped/trimmed to allow good air flow from the hood scoop to the turbo.
When parking in my garage the hood is popped for decent airflow, and easy driving is done the last minute before a shut down.
TD06SL2R 9 blade turbine, 20g 10 blade compressor Stage 3, Everything Ported, AGP Direct Fit I.C., 55 T.B., ACT, Thermal with Cat., and gutted BS housing.