cant add turbo sound

I want to have a blow off valve on my mod, the sound is located in the vehicle it self , I tried many things in the .sbeam but it doesnt works, here is the .sbeam code

{
"modifiers":[
["name", "source", "factor", "offset", "min", "max"],
["engine_throttle", "engineThrottle", 1, 0, 0.65, 1],
],
"sounds":[
["group", "filename", "profile", "nodeName", "source", "factor", "offset", "minVolume", "minPitch", "maxVolume", "maxPitch", "pitchBlendInStartValue", "pitchBlendInEndValue", "volumeBlendInStartValue", "volumeBlendInEndValue", "volumeBlendOutStartValue", "volumeBlendOutEndValue", "volumeModifiers", "pitchModifiers"],
["default", "rceng.ogg", "AudioDefaultLoop3D", "ENGINE", "rpm", 1, 0, 0, 0, 1, 2, 200, 15000, 0, 200, 999998, 999999, ["engine_throttle"], [] ],
["default", "vehicles/delta/sounds/turbo_bov.ogg", "AudioDefaultLoop3D", "ENGINE", "turboRpmRatio", 1, 0, 0, 0, 0.45, 1, 0, "MAXRPM", 5000, 7000, 8500, 19000, ["engine_throttle"], [] ],
],
}



The red lined should be the blow off valve ...
--- Post updated ---
anyone?