in mild F/I setups the 07-08's see around 10-15whp more then a 05-06 from similar setups

 

Anything about power is speculation at this point. With less advanced cars there's a pretty good way of estimating gains by comparing lift and overlap ratios but we'd be dealing with VVT-i. The ECU has set parameters that it likes to operate within and it'll change the timing until it sees what it likes. That is to say, there's a good chance that simplying changing your cams will result in a net of zero change.

You know, since everyones speculating.

If you get NA cames, I'm sure the community at large will appreciate what you find out. I can't think of anyone who has ever posted about actually going through with NA cams for the tC.

 

As far as I know there is one or two members here that have webcam cams, and I was told by one of them that the gains didn't justify the costs. I know that's not exactly the answer you wanted, but logic dictates that after 4 model years of the tC and you haven't seen 100+ threads about 10-20 HP gain cam swaps, odds are cams won't make an appreciable difference.