There are a few hard core guys adding small turbos to their S/C Previas and running them both in conjuction....
There's quite a big difference between the N/A (2TZ-FE) and S/C (2TZFZE)
The S/C engine has a lower CR and is built with forged internals, so they can handle pretty much all the boost you can throw at it
I wouldn't attempt adding forced induction to the N/A plant without upgrading the internals as well
Rick <-----
95 Previa owner
Aztek T/A WS7 & 70 RAM AIR IV T/A
Moderator @ LS2, FAST LS1, FUELSLUT,
The F-Body Hideout, LS1Turd & ChopperForums