I remember reading about a possible future WRX/STI platform.
Not hard specs, but a supposed theory.
The turbo has an electric motor matted that can engage/disengage.
At low RPM electric motor assist the turbine = reduced/no lag.
Disengages when the engine produces enough exhaust gasses itself to spool.
Thermal energy from exhaust housing is converted to charge the units separate battery.
That battery or cell is also supplied power from vehicles power supply.
Off topic below.
Above speculation plus a new
light weight, smaller, AWD chassis has me excited.
As of now, one can only dream.
