Holy $$$$$$$$$$$$$$$$$$$$$$
I have been thinking about doing this since I bought my GT500 in May, some said it would work, some said it would not, either way I thought there would be some issues to overcome. It does not really seem that way.
No one has pointed out the change in spool point, its been reduced by nearly 1000RPM. The engine is now acting like a big cube motor with the twin screw back on, and spooling the turbos much faster.
What A/R are the turbos now? Stepping up a size may help top end power, and reduce that TQ spike on the low end. Normally we like TQ, but it does not help his traction situation.
A roots blower has some inherent differences compared to a twin screw, and I actually wonder how they would play out in this type of situation, there could be some benefits when it comes to driveability and overall system efficiency.
It would not be easy to build and install a reliable SC clutch setup to turn off the blower. I would actually rather have it still spinning for several reasons.
Also, some have pointed out that boost compounds. In this case it does not since, one is feeding the other. Airflow is increase, but not boost per say.