my typhoon runs open loop on a Saudi chip all the time…but it also doesn’t know what a knock sensor, o2 sensor and egr valve is.
the atr chip runs closed loop-i dont use this one as much
-all i know is the open loop helps me run faster in the quarter
no the trims lock 0.0 when the car enters PE, and i have said i have tuned the car so that the trims are within +/-3, and that is better than what our specific 3800 vendors recommend of +/-5
01GPGT let me know if you need any help, id be glad