I am new to the forum. I have a wrx tr 2006 US specs.
I have recently installed a full 3" invidia TBE with catless DP and running on cobb stage 2 map. The turbo is TD04 stock. I am overboosting on 4th and 5th gear on high RPM. I know that my only solution is to pore the internal wastegate of my turbo or install an EWG. I am willing to go with the EWG since my future mod will be a VF48. I just want to know is it normal to overboost on a TD04? What do I need to install an EWG? grimmspeed uppie and tial 38mm is all what I need? Thanks.
I also have a 06 on the stock td04 with tbe. I was also overboosting on the cobb ots map. I went ewg and it solved all my problems. You will need uppipe, wastegate with all springs, a tune, dumptube, and a 3 port ebcs is recomended.