Yeah, the t25 is a smaller turbo, for that kind of hp you'll need to run higher boost. Japan is great place to do a n/a to turbo (Japanese cars/motors). That’s were all kits came from and alot of great turner that know what there doing. Here in the States, it's more up to the individual to know all the fine details of what needs to be done. There has been very little done for the 2zz-ge, throw in the Lotus tuning and how it’s packaged into the Elise, there’s going to be a ton of trail and error trying to see what works best… but if you’ve got deep pockets, patience and willing to deal with lots of down time, void your warranty… it could be fun to see what you can get out of it.
Have own a mid-engine car design for a turbo, guys have mod them to run in the 400-500hp range (stock 200 hp). I can appreciate the work and effort that goes into it. As well as the speed they get out of them. But I’ve always been more interested in the handling. The Elise should be fast enough and a turbo takes a edge off of the handling. If I want a bit more speed will look into dropping weight or getting a bit more out of it in N/A trim.