diff --git a/firmware/console/binary/tunerstudio_configuration.h b/firmware/console/binary/tunerstudio_configuration.h
index 25f029a0b9..f5145c56ec 100644
--- a/firmware/console/binary/tunerstudio_configuration.h
+++ b/firmware/console/binary/tunerstudio_configuration.h
@@ -122,7 +122,8 @@ typedef struct {
 	int debugIntField3; // 220
 	int timeSeconds; // 224
 	float engineLoadDelta; // 228
-	int unused3[11];
+	float speedToRpmRatio; // 232
+	int unused3[10];
 } TunerStudioOutputChannels;
 
 #endif /* TUNERSTUDIO_CONFIGURATION_H_ */
diff --git a/firmware/tunerstudio/rusefi.ini b/firmware/tunerstudio/rusefi.ini
index 446d9a932f..2b26044e16 100644
--- a/firmware/tunerstudio/rusefi.ini
+++ b/firmware/tunerstudio/rusefi.ini
@@ -809,6 +809,7 @@ fileVersion = { 20160430 }
       debugIntField2    = scalar,  U32,   216, "val",          1,       0.0;
       debugIntField3    = scalar,  U32,   220, "val",          1,       0.0;
       engineLoadDelta = scalar,F32, 228, "value",            1,         0
+      speedToRpmRatio = scalar,F32, 232, "value",            1,         0
 
       egoCorrection   = { 100 }
       time            = { timeNow }
@@ -1088,6 +1089,8 @@ fileVersion = { 20160430 }
    debugIntField1Gauge = debugIntField1, "debug i1", "%",     0,   100,     0,    0,    100,  100,   0,   0
    debugIntField2Gauge = debugIntField2, "debug i2", "%",     0,   100,     0,    0,    100,  100,   0,   0
    debugIntField3Gauge = debugIntField3, "debug i3", "%",     0,   100,     0,    0,    100,  100,   0,   0
+   speedToRpmRatioGauge = speedToRpmRatio, "speed2rpm", "",     0,   100,     0,    0,    100,  100,   4,   4
+   
    
 [FrontPage]
    ; Gauges are numbered left to right, top to bottom.
@@ -1151,6 +1154,7 @@ fileVersion = { 20160430 }
    entry = ign_adv,	    	"ignAdv",	   float,  "%.2f"
    entry = knockLevel,	    "Knock", 	   float,  "%.2f"
    entry = vehicleSpeedKph,	"speed",	   float,  "%.2f"
+   entry = speedToRpmRatio, "s2rpm",	   float,  "%.3f"
    entry = rpmAcceleration, "dRPM",        float,  "%.3f"
    entry = massAirFlowValue,"airMass",     float,  "%.3f"
    entry = pedalPosition,   "pedal",       float,  "%.3f"
@@ -1640,8 +1644,9 @@ cmd_test_idle_valve          = "w\x00\x17\x00\x01"
 
 ;		Engine->Speed Sensor
 	dialog = speedSensor,				"Speed Sensor Settings"
-		field = "Input pin",							vehicleSpeedSensorInputPin
-		field = "revolution to speed mult",				vehicleSpeedCoef
+		field = "Enabled",								hasVehicleSpeedSensor
+		field = "Input pin",							vehicleSpeedSensorInputPin, {hasVehicleSpeedSensor == 1}
+		field = "revolution to speed mult",				vehicleSpeedCoef, {hasVehicleSpeedSensor == 1}
 
 ;			Engine->Other inputs	
 	dialog = analogInputs, "Analog inputs"