Twin Turbos - No tail vs Duck vs Turbo - Airflow/Downforce?

[beepbeep]

Originally posted by RarlyL8

Thanks again for all this info. Much more specific than what I've read. This all leads to an additional question:
Given all the above info, why did Porsche twin turbocharge the 993T ?

For variety of reasons:

1. There were no affordable BB units with those characteristics available at that time.

2. Engine is 0.3L larger than yours

3. TT simplifies packaging and there was no pesky CIS to worry about.

4. Short headers will keep exhaust gases warm, which will heat up the cats quickly, which means they would be able to pass emission tests better.

5. When you are major manufacturer, you can order customized turbochargers from factory that exactly fit your needs.