714 millivolts is lean, and 20 pounds of boost on pump gas is insane. Do you know anything about engines/turbos etc? A turbo'd hot rod in the hands of someone who's never worked on a car is like russian roulette with 5 bullets in the chamber. You may get lucky and not blow the motor the first time you overboost, but the next time is almost a mathematical certainty. You need high octane fuel or alky injection. If you cant afford 7 bucks a gallon like me, get alky injection and tune it properly and dont overboost. Spend some time with the boost at 13psi and learn a little more about engines and turbocharging. No need to remove the RJC controller. Its a good piece that helps the turbo spool faster, no matter where you have the boost set. But do turn the boost down immediately.
If this is a fairly new car for you, spend time learing about electronic fuel injection, and all the sensors and things that make it work. Then dial them all in, replcae as many as you can, replace all the hoses you can, and get some heater hose to use as a stethoscope, and listen at the base of each fuel injector for a sucking/hissing sound, while the engine is idling. I hit 15 degrees retard when I got my car, and it was mostly because I had 2 injectors with torn o-rings, a ton of bad leaking hoses, and the intake gasket was that steel shimstock crap that never seals right, and had loose black RTV silicone hanging all over it...that crap never lasts once it comes in contact with oils (permatex "the right stuff" is the only thing to use)...people think silicone is the cure for varying compression over the surface of the intake gaskets...if you need silicone to seal things up, its not right and WILL leak under boost and vacuum. It'll blow right out and your engine will suck it right up. The factory machining tolerances are too far off for a thin steel shim gasket to seal everywhere...pull that intake manifold off, replace the PCV grommet, pull all the injectors out and inspect them and their o-rings, and replace the intake gasket with a fel-pro 1 piece pan style gasket. Use an exacto knife to trim out any gasket that protrudes into the intake ports. Replacing that intake gasket made a massive difference in driveability and idle quality on my car. You can have 1 or 2 cylinders that have big vacuum leaks, which will trigger detonation even at low boost..I hit that 15 degrees of retard at only 13psi.
