diff --git a/DynObj.cpp b/DynObj.cpp
index 6008549d..e8ad81bd 100644
--- a/DynObj.cpp
+++ b/DynObj.cpp
@@ -6625,7 +6625,7 @@ TDynamicObject::powertrain_sounds::render( TMoverParameters const &Vehicle, doub
     if( Vehicle.TurboTest > 0 ) {
         // udawanie turbo:
 		auto const pitch_diesel { Vehicle.EngineType == TEngineType::DieselEngine ? Vehicle.enrot / Vehicle.dizel_nmax : 0 };
-        auto const goalpitch { std::max( 0.025, ( engine_volume + pitch_diesel + engine_turbo.m_frequencyoffset ) * engine_turbo.m_frequencyfactor ) };
+        auto const goalpitch { std::max( 0.025, ( engine_volume * pitch_diesel + engine_turbo.m_frequencyoffset ) * engine_turbo.m_frequencyfactor ) };
         auto const goalvolume { (
             ( ( Vehicle.MainCtrlPos >= Vehicle.TurboTest ) && ( Vehicle.enrot > 0.1 ) ) ?
                 std::max( 0.0, ( engine_turbo_pitch + engine_turbo.m_amplitudeoffset ) * engine_turbo.m_amplitudefactor ) :
diff --git a/driveruipanels.cpp b/driveruipanels.cpp
index 8efa947d..b278f53f 100644
--- a/driveruipanels.cpp
+++ b/driveruipanels.cpp
@@ -717,7 +717,8 @@ debug_panel::update_section_engine( std::vector<text_line> &Output ) {
 
         std::string parameterstext = "param       value";
         std::vector< std::pair <std::string, double> > const paramvalues {
-            { "efill: ", mover.dizel_fill },
+			{ "  rpm: ", mover.enrot * 60.0 },
+			{ "efill: ", mover.dizel_fill },
             { "etorq: ", mover.dizel_Torque },
             { "creal: ", mover.dizel_engage },
             { "cdesi: ", mover.dizel_engagestate },