i have just recently finished my engine with single turbo and streetport setup. anyways the car leans out right before going into boost, by leaning out i mean according to the lean rich guage as i start to accelerate and the car transitions fro vacume to 0 lbs the guage slowly goes into the lean and light drops off. if i continue i may get a nasty bog thats quick followed by backfire. now if i get past this the light shows back up goes into green and we are in boost. I do have an EGT and its reading around 650C' when this occurs. for fuel i have an SX fuel pressure regulator followed by a Cartech Rising pressure regulator and im getting a reading of 40lbs reg and 60-65 in boost.

any help will be greatly appriciated

thanks
Rob

 

ECU?

Is your ECU tuned properly for a single turbo set up?

Please tell me your not still running the stock ECU with a single turbo.

 

please dont use aftermarket a/f ratio gauge which utilized stock o2 sensor for readings, only use a true, professionaly built wideband to avoid engine damage.

P.S. aftermakred ones only sorta/kinda work at WOT

 

If it's not tuned, don't even think of driving that car.

EGT + A/F with narrow-band stock O2 sensor as a form of tuning = blown engine.