diff --git a/games/builtin/forza_horizon_4/parser.py b/games/builtin/forza_horizon_4/parser.py
index c12e76a..fa1652a 100644
--- a/games/builtin/forza_horizon_4/parser.py
+++ b/games/builtin/forza_horizon_4/parser.py
@@ -15,37 +15,36 @@ class ForzaHorizon4Parser:
         td = TelemetryData(game_id="forza_horizon_4", timestamp=time.time())
         td.raw = {"raw_hex": data.hex(), "length": len(data), "addr": f"{addr[0]}:{addr[1]}"}
 
-        if len(data) < 323:
+        if len(data) < 312:
             return td
 
         try:
-            offset = 12
-            td.rpm = struct.unpack_from("<f", data, 8)[0]
-            td.max_rpm = struct.unpack_from("<f", data, 16)[0]
-            td.horsepower = struct.unpack_from("<f", data, 12)[0]
-            td.torque = struct.unpack_from("<f", data, 20)[0]
-            td.boost = struct.unpack_from("<f", data, 308)[0]
-            td.fuel = struct.unpack_from("<f", data, 312)[0]
-            td.oil_temp = struct.unpack_from("<f", data, 316)[0]
-            td.engine_temp = struct.unpack_from("<f", data, 320)[0]
-            td.speed_mph = struct.unpack_from("<f", data, 244)[0]
-            td.speed_kmh = td.speed_mph * 1.60934
-            td.gear = struct.unpack_from("<B", data, 264)[0]
-            td.best_lap = struct.unpack_from("<f", data, 268)[0]
-            td.last_lap = struct.unpack_from("<f", data, 276)[0]
-            td.lap_time = struct.unpack_from("<f", data, 284)[0]
-            td.lap_number = struct.unpack_from("<H", data, 292)[0]
-            td.position_x = struct.unpack_from("<f", data, 0)[0]
-            td.position_y = struct.unpack_from("<f", data, 4)[0]
-            td.position_z = struct.unpack_from("<f", data, 552)[0]
-            td.acceleration_x = struct.unpack_from("<f", data, 300)[0]
-            td.acceleration_y = struct.unpack_from("<f", data, 304)[0]
-            td.acceleration_z = struct.unpack_from("<f", data, 196)[0]
-            td.throttle = struct.unpack_from("<f", data, 228)[0]
-            td.brake = struct.unpack_from("<f", data, 232)[0]
-            td.steering = struct.unpack_from("<f", data, 204)[0]
-            td.clutch = struct.unpack_from("<f", data, 252)[0]
-            td.handbrake = struct.unpack_from("<f", data, 256)[0]
+            td.raw["is_race_on"] = struct.unpack_from("<i", data, 0)[0]
+            td.max_rpm = struct.unpack_from("<f", data, 8)[0]
+            td.rpm = struct.unpack_from("<f", data, 16)[0]
+            td.acceleration_x = struct.unpack_from("<f", data, 20)[0]
+            td.acceleration_y = struct.unpack_from("<f", data, 24)[0]
+            td.acceleration_z = struct.unpack_from("<f", data, 28)[0]
+            td.position_x = struct.unpack_from("<f", data, 244)[0]
+            td.position_y = struct.unpack_from("<f", data, 248)[0]
+            td.position_z = struct.unpack_from("<f", data, 252)[0]
+            td.speed_kmh = struct.unpack_from("<f", data, 256)[0] * 3.6
+            td.speed_mph = td.speed_kmh * 0.621371
+            td.horsepower = struct.unpack_from("<f", data, 260)[0] / 745.7
+            td.torque = struct.unpack_from("<f", data, 264)[0]
+            td.boost = struct.unpack_from("<f", data, 284)[0]
+            td.fuel = struct.unpack_from("<f", data, 288)[0]
+            td.best_lap = struct.unpack_from("<f", data, 296)[0]
+            td.last_lap = struct.unpack_from("<f", data, 300)[0]
+            td.lap_time = struct.unpack_from("<f", data, 304)[0]
+            td.lap_number = struct.unpack_from("<H", data, 312)[0]
+            td.raw["race_position"] = struct.unpack_from("<B", data, 314)[0]
+            td.throttle = struct.unpack_from("<B", data, 315)[0] / 255.0
+            td.brake = struct.unpack_from("<B", data, 316)[0] / 255.0
+            td.clutch = struct.unpack_from("<B", data, 317)[0] / 255.0
+            td.handbrake = struct.unpack_from("<B", data, 318)[0] / 255.0
+            td.gear = struct.unpack_from("<B", data, 319)[0]
+            td.steering = max(-1.0, min(1.0, struct.unpack_from("<b", data, 320)[0] / 127.0))
         except struct.error:
             pass
 
diff --git a/games/builtin/forza_horizon_5/parser.py b/games/builtin/forza_horizon_5/parser.py
index cf5647e..e85dbe6 100644
--- a/games/builtin/forza_horizon_5/parser.py
+++ b/games/builtin/forza_horizon_5/parser.py
@@ -13,38 +13,66 @@ class ForzaHorizon5Parser:
 
     def parse(self, data: bytes, addr: tuple) -> TelemetryData:
         td = TelemetryData(game_id="forza_horizon_5", timestamp=time.time())
-        td.raw = {"raw_hex": data.hex(), "length": len(data), "addr": f"{addr[0]}:{addr[1]}"}
+        td.raw = {
+            "raw_hex": data.hex(),
+            "length": len(data),
+            "addr": f"{addr[0]}:{addr[1]}",
+        }
 
-        if len(data) < 323:
+        if len(data) < 312:
             return td
 
         try:
-            td.rpm = struct.unpack_from("<f", data, 8)[0]
-            td.max_rpm = struct.unpack_from("<f", data, 16)[0]
-            td.horsepower = struct.unpack_from("<f", data, 12)[0]
-            td.torque = struct.unpack_from("<f", data, 20)[0]
-            td.boost = struct.unpack_from("<f", data, 308)[0]
-            td.fuel = struct.unpack_from("<f", data, 312)[0]
-            td.oil_temp = struct.unpack_from("<f", data, 316)[0]
-            td.engine_temp = struct.unpack_from("<f", data, 320)[0]
-            td.speed_mph = struct.unpack_from("<f", data, 244)[0]
-            td.speed_kmh = td.speed_mph * 1.60934
-            td.gear = struct.unpack_from("<B", data, 264)[0]
-            td.best_lap = struct.unpack_from("<f", data, 268)[0]
-            td.last_lap = struct.unpack_from("<f", data, 276)[0]
-            td.lap_time = struct.unpack_from("<f", data, 284)[0]
-            td.lap_number = struct.unpack_from("<H", data, 292)[0]
-            td.position_x = struct.unpack_from("<f", data, 0)[0]
-            td.position_y = struct.unpack_from("<f", data, 4)[0]
-            td.position_z = struct.unpack_from("<f", data, 552)[0]
-            td.acceleration_x = struct.unpack_from("<f", data, 300)[0]
-            td.acceleration_y = struct.unpack_from("<f", data, 304)[0]
-            td.acceleration_z = struct.unpack_from("<f", data, 196)[0]
-            td.throttle = struct.unpack_from("<f", data, 228)[0]
-            td.brake = struct.unpack_from("<f", data, 232)[0]
-            td.steering = struct.unpack_from("<f", data, 204)[0]
-            td.clutch = struct.unpack_from("<f", data, 252)[0]
-            td.handbrake = struct.unpack_from("<f", data, 256)[0]
+            td.raw["is_race_on"] = struct.unpack_from("<i", data, 0)[0]
+
+            # 引擎
+            td.max_rpm = struct.unpack_from("<f", data, 8)[0]
+            td.rpm = struct.unpack_from("<f", data, 16)[0]
+
+            # 加速度 (m/s²)
+            td.acceleration_x = struct.unpack_from("<f", data, 20)[0]
+            td.acceleration_y = struct.unpack_from("<f", data, 24)[0]
+            td.acceleration_z = struct.unpack_from("<f", data, 28)[0]
+
+            # 位置
+            td.position_x = struct.unpack_from("<f", data, 244)[0]
+            td.position_y = struct.unpack_from("<f", data, 248)[0]
+            td.position_z = struct.unpack_from("<f", data, 252)[0]
+
+            # 速度 (m/s)
+            td.speed_kmh = struct.unpack_from("<f", data, 256)[0] * 3.6
+            td.speed_mph = td.speed_kmh * 0.621371
+
+            # 马力 & 扭矩
+            td.horsepower = struct.unpack_from("<f", data, 260)[0] / 745.7
+            td.torque = struct.unpack_from("<f", data, 264)[0]
+
+            # 增压 & 燃油
+            td.boost = struct.unpack_from("<f", data, 284)[0]
+            td.fuel = struct.unpack_from("<f", data, 288)[0]
+
+            # 圈速
+            td.best_lap = struct.unpack_from("<f", data, 296)[0]
+            td.last_lap = struct.unpack_from("<f", data, 300)[0]
+            td.lap_time = struct.unpack_from("<f", data, 304)[0]
+            td.lap_number = struct.unpack_from("<H", data, 312)[0]
+
+            # 排名
+            td.raw["race_position"] = struct.unpack_from("<B", data, 314)[0]
+
+            # 玩家输入 (U8, 0-255)
+            td.throttle = struct.unpack_from("<B", data, 315)[0] / 255.0
+            td.brake = struct.unpack_from("<B", data, 316)[0] / 255.0
+            td.clutch = struct.unpack_from("<B", data, 317)[0] / 255.0
+            td.handbrake = struct.unpack_from("<B", data, 318)[0] / 255.0
+
+            # 档位
+            td.gear = struct.unpack_from("<B", data, 319)[0]
+
+            # 转向 (-127 ~ 127)
+            td.steering = max(-1.0, min(1.0,
+                struct.unpack_from("<b", data, 320)[0] / 127.0))
+
         except struct.error:
             pass
 
diff --git a/server/telemetry/parsers/__init__.py b/server/telemetry/parsers/__init__.py
index 169deea..e6eebab 100644
--- a/server/telemetry/parsers/__init__.py
+++ b/server/telemetry/parsers/__init__.py
@@ -27,47 +27,36 @@ class ForzaParser(BaseParser):
         td = TelemetryData(game_id=self._format, timestamp=time.time())
         td.raw = {"raw_hex": data.hex(), "length": len(data), "addr": f"{addr[0]}:{addr[1]}"}
 
-        if len(data) < 323:
+        if len(data) < 312:
             logger.warning("Forza data too short: %d bytes", len(data))
             return td
 
         try:
-            if self._format == "fh4":
-                offset = 0
-            else:
-                offset = 0
-
-            td.rpm = struct.unpack_from("<f", data, 8)[0]
-            td.max_rpm = struct.unpack_from("<f", data, 16)[0]
-            td.horsepower = struct.unpack_from("<f", data, 12)[0]
-            td.torque = struct.unpack_from("<f", data, 20)[0]
-
-            td.boost = struct.unpack_from("<f", data, 308)[0]
-            td.fuel = struct.unpack_from("<f", data, 312)[0]
-            td.oil_temp = struct.unpack_from("<f", data, 316)[0]
-            td.engine_temp = struct.unpack_from("<f", data, 320)[0]
-
-            td.speed_mph = struct.unpack_from("<f", data, 244)
-            td.speed_kmh = td.speed_mph * 1.60934
-            td.gear = struct.unpack_from("<B", data, 264)[0]
-            td.best_lap = struct.unpack_from("<f", data, 268)[0]
-            td.last_lap = struct.unpack_from("<f", data, 276)[0]
-            td.lap_time = struct.unpack_from("<f", data, 284)[0]
-            td.lap_number = struct.unpack_from("<H", data, 292)[0]
-
-            td.position_x = struct.unpack_from("<f", data, 0)[0]
-            td.position_y = struct.unpack_from("<f", data, 4)[0]
-            td.position_z = struct.unpack_from("<f", data, 552)[0]
-
-            td.acceleration_x = struct.unpack_from("<f", data, 300)[0]
-            td.acceleration_y = struct.unpack_from("<f", data, 304)[0]
-            td.acceleration_z = struct.unpack_from("<f", data, 196)[0]
-
-            td.throttle = struct.unpack_from("<f", data, 228)[0]
-            td.brake = struct.unpack_from("<f", data, 232)[0]
-            td.steering = struct.unpack_from("<f", data, 204)[0]
-            td.clutch = struct.unpack_from("<f", data, 252)[0]
-            td.handbrake = struct.unpack_from("<f", data, 256)[0]
+            td.raw["is_race_on"] = struct.unpack_from("<i", data, 0)[0]
+            td.rpm = struct.unpack_from("<f", data, 16)[0]
+            td.max_rpm = struct.unpack_from("<f", data, 8)[0]
+            td.horsepower = struct.unpack_from("<f", data, 260)[0] / 745.7
+            td.torque = struct.unpack_from("<f", data, 264)[0]
+            td.boost = struct.unpack_from("<f", data, 284)[0]
+            td.fuel = struct.unpack_from("<f", data, 288)[0]
+            td.speed_kmh = struct.unpack_from("<f", data, 256)[0] * 3.6
+            td.speed_mph = td.speed_kmh * 0.621371
+            td.gear = struct.unpack_from("<B", data, 319)[0]
+            td.best_lap = struct.unpack_from("<f", data, 296)[0]
+            td.last_lap = struct.unpack_from("<f", data, 300)[0]
+            td.lap_time = struct.unpack_from("<f", data, 304)[0]
+            td.lap_number = struct.unpack_from("<H", data, 312)[0]
+            td.position_x = struct.unpack_from("<f", data, 244)[0]
+            td.position_y = struct.unpack_from("<f", data, 248)[0]
+            td.position_z = struct.unpack_from("<f", data, 252)[0]
+            td.acceleration_x = struct.unpack_from("<f", data, 20)[0]
+            td.acceleration_y = struct.unpack_from("<f", data, 24)[0]
+            td.acceleration_z = struct.unpack_from("<f", data, 28)[0]
+            td.throttle = struct.unpack_from("<B", data, 315)[0] / 255.0
+            td.brake = struct.unpack_from("<B", data, 316)[0] / 255.0
+            td.steering = max(-1.0, min(1.0, struct.unpack_from("<b", data, 320)[0] / 127.0))
+            td.clutch = struct.unpack_from("<B", data, 317)[0] / 255.0
+            td.handbrake = struct.unpack_from("<B", data, 318)[0] / 255.0
 
             td.raw.update({
                 "speed_mph": td.speed_mph,