bdalameda
Active member
I installed the Healtech exhaust servo modules that allow you to turn the servos on or off(open). I've put a few miles with the servos open. I noticed that the throttle response has a slight dead spot with them open. It feels like a lean condition. I also notice slight detonation when accelerating under a good load especially when going uphill. It does not do this with the servo valves operating normally. I will give it a few miles to see if the fuel trim will recalibrate. I do have a custom BTMoto tune - It is different from the high performance tune that they sell online. This tune they customized for me makes some improvement but does not reduce fuel economy so much.
