well with the same psi, theres nothing wo worry about. its when you go above the tolerances. and since when does a motor cost 10K? and yes as stated above i am a mechanic, and yes i do have to still buy motors lol, but i know how to work on them when i exceed the motors capability of boost. but at 6 psi, theres VERY minimal danger to the motor of the TC considering that its internals are already balanced and forged. the TC is capable of more PSI than alot of you think. jotec ran up to 14 psi safely before they upgraded the internals for a final 27psi.
and to the people who think toyota will "just replace your motor" if something happens. let me tell you from a mechanics point of view, they will find EVERY possible way that it was YOUR fault. with the low psi that comes with the TRD s/c, its ALMOST guarenteed not to blow your motor, thats why they put such a good warranty on it. they would not screw themselves unless it was tried and tested thuroughly(sp) before it hit the market, aqnd was determinde there would be a VERY MINIMAL chance of you blowing your motor from the s/c.
and this post was mainly for the guys like me who really dont care about the warranty toomuch, but cant decide on weather to go s/c or turbo. i know the pros and cons of each, but for the guys/gals who wanna make their TC fast, this is the most cost effective way.
and trust me: i know about blowing motors here was my type-r with its first motor lol
i blew that at rocky mountain raceway when i got a little too cocky and turned the boost up to 16psi, when i KNEW it wasnt ready yet for it. new motor cost $2500.