I had my TD04 at between 1-1.2 bar on a 4e, i know this will sound silly but i wished it was slightly more laggy lol. When i set it up i was getting full boost before 3500k. My old WRX had a TD05 18g on it and holy fuck when that came on full chat it was intense to say the least. I'd go for 4e with TD05 16g. And Weyro, why you selling that GT28 kit anyway ??