ok in a nut shell her is what whe did s5 n/a and bolted on a xs power turbo kit to the stock motor put the tll injectors in tll mas air meter and tll ecu is there any wiring i have to do to make this run right when i make 7 psi of boost a 5500 rpm it starts breaking up real bad i have the timing 19 retarded , also there is no 02 sensor yet when i get that installed will that fix my problem or is there any wireing i have to change please help

 

it is proably over 7psi and did you change the Map sensor, i dont think the na one nows what prossitive pressure is.

If u are running higher than, I think 9 or 10 you will hit the fuel cut to the rear rotor.

 

It's probably very lean at that point. That XS Power turbo is larger then stock most likely and on any turbo-NA even with the stock turbo the 550s are only just large enough if not running a big fuel pump.

Also could be a fuel cut issue as mentioned above.

 

haha god that sounds like a bomb waiting to go off!