Gibbo205
Well-Known Member
Here it is guys. 2018 Headers with active exhaust. First to film. Watch to the end!
Hey buddy
On your low power figure might be down to knock retard, in your first video I can hear what definitely sounds like something knocking on the underside of the car which sounds like metal on metal.
I heard it a few times in the video, but play it at 6:15 full volume and listen to the background noise carefully, at 6:25 you shift and it goes away. I also hear it at several other points in the video when your cruising.
It could be nothing, but it sounds to me like something is touching on the underside of the car. MY15-17 had two knock sensors and any kind of touching of metal to metal would set them off (false knock) and then retard timing. On the MY18 you have four knock sensors, they are now even more sensitive to any kind of metal on metal noise and if the noise I am hearing is the exhaust slightly touching somewhere, then you could be experiencing false knock which will reduce power.
Have you datalogged the car and reviewed the logs and checked your spark advance and knock sensors to see what you are getting?
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