Good job Bill... I'm going to refer all those that want to turbo their 2zz to this thread. I have a little bit info for those that want to turbo their 2zz corolla/celica without opening the engine/gearbox since I've been through that stage and pushing where most wouldn't. So this might be a good indication for those "extreme" cases. Cost-wise: Around the same as Bill has mentioned minus the engine internals parts (roughly 10-12k). Power-wise: Will be determine on how much you want to spend, and how much you can afford to spend when things go wrong. Anything from 140-200kw is possible (if your looking to make less than 140, think about s/c). I'm pushing the 2zz-ge to it's limits, and the majority of built 2zz boys (smaay, boosted etc.) say it's not safe. It isn't. Safe power-level are discussed in the link bill posted (keeping in mind USA dyno read higher than Aus dyno's). But I believe the 2zz-ge is a decent engine, it just depends on how well your setup is which will determine it's life, which means $$$. My setup is a little bit overkill, but it makes running this much power possible and "safe". Last dyno'd the celica was making 206kw atw - 12.8@114mph. Been running at this power level for about a year. Before that the celica was putting 180kw atw - 13.2 @ 106mph for nearly a year. So it's possible to have "power". Every bit adds up in the hunt for power... I wouldn't even think to push the engine if it didn't have a "good quality" setup. Be prepared to check/maintain the engine on a weekly basis, chuck it on dyno to check fuel/knock levels regularly etc. My opinion is to set a goal. And seek out a turbo that can do that comfortably at relatively low boost levels. And do that at lowest boost pressure possible. ie. Have all supporting mods that aid in making the power easily: free-flowing exhaust, standalone ecu, larger injectors.. If your just searching for 160kw then a GT2871r would be ideal. 200kw+ Gt3071r/GT30r... And then you'll have room to move when you build the engine, which will definately be required down the track. Last... Research. I asked Bill alot of questions before I started my build. Thanks Bill!!