- KNOCK_THRESHOLD_BASE = KD Base = KS Safe base - KNOCK_THRESHOLD_MAGNITUDE = KD Mag - KS_MAGNITUDE = KS Mag w Comps . Test parameters - Stock 2.5L with no balance shaft. - Very loud 800cc injectors (you can hear them above the engine noise at idle) - Boosted and makes around ~330whp. - Race single with a 2.5" exhaust. - Stock engine mounts and flywheel. - FX350 Clutch. - Lowered on coilovers riding a bit rough. - KS4 knock sensor is bolted on top of the OEM one. - Running on 94 octane fuel + water meth. - I was running a my safe tune - Boost control was disabled but boot still went up to 15 PSI because of the weather. - Ambient temperature 5C or 40F.