i dont mean to sound dumb but i dont have the time nor the patience to learn how to calculate all the stuff required to size a turbo. has anyone else done the calculating for a 2.2 ecotec? ive got full 2.5 in exhaust high flow cat glasspack and a cai. if that makes a difference. and i have a t3/t4 to4e 57 trim turbo. can anyone help me out. was this the rioght turbo to buy? and can anyone put the t3/t4 map with the ecotecs points on it already plotted thank you that would be a huge help.

http://img828.imageshack.us/img828/2742/t04e57.jpg

There ya go.

I wouldn't sweat the surge line (left line of map) too much, they usually don't build boost 100% linear like that anyway. I was guessing that it will hit full spool at 3100 too, revving to a max of 6800. The different PSI's are marked on the picture.

wow thanks man so if im not mistaken 15 psi looks like it would be a good place to be for this turbo?

You could probably run 20 no problem. Like I said the boost does not build in a straight line like in the picture. It is for representation only. Now you may have a slight problem running 25, that is pretty far past the surge.