Quote Originally Posted by All4bspinnin View Post
also... from what I read... the LL8 guys are asking for an OS (im assuming oxygen sensor?) that reads more than 1 bar of boost... apparently... the stock ecu likes to throw the car into limp mode if it see's anything more.

opinions, comments, suggestions?
It has to do with the internal PCM code and the fact that the PCM uses a hybrid alpha-n/Speed Density fueling model.

But, this is only applicable to the 02-05 P10 PCMs, hence why you need to look for an 06-09 motor. As I stated before, use an 07-09 motor and pair it with the E67 ECM and the T42 TCM (if you run a GM trans).

Summary: Buy an 08-09 motor complete with the wiring harness to make it dead simple, an 07 motor will work if you use the 08-09 wiring and ECM/TCMs.

The E67 can run up to 2.5 Bar of boost in stock form, just scale the VVE properly and run a 2 or 3 Bar MAP sensor.