the RX7 didnt blow one turbo into another though. they were both small turbos… one activated at low rpms for good spool and the 2nd came online later to supplement the high rpm power and to keep the small size from choking the motor. ’
diesels feed the output of the first turbo into the inlet of the second for ridiculous boost though many tractor pull guys are focusing on making everything flow more rather than increasing pressure.
Thom, you are dumb and you spell your name wrong… lol 
Brian