diff --git a/PHI-CL/changelog.txt b/PHI-CL/changelog.txt
index 2a6f5f6..b5b0850 100644
--- a/PHI-CL/changelog.txt
+++ b/PHI-CL/changelog.txt
@@ -5,6 +5,7 @@ Date: 2024-11-28
   Changes:
     - [CL] Changed some locale and settings values.
     - [SA] Changed the map generation for single planet run.
+    - [SA] Changed the starting speed of railgun to make the speed research effect work.
 
 ---------------------------------------------------------------------------------------------------
 Version: 3.0.39
diff --git a/PHI-CL/data.lua b/PHI-CL/data.lua
index af9cc39..49ee3cc 100644
--- a/PHI-CL/data.lua
+++ b/PHI-CL/data.lua
@@ -852,6 +852,10 @@ if settings.startup['PHI-SA'].value then
 
             data.raw.roboport.roboport.charging_station_count_affected_by_quality = true
             data.raw['roboport-equipment']['personal-roboport-equipment'].charging_station_count_affected_by_quality = true
+
+            data.raw['ammo-turret']['railgun-turret'].starting_attack_speed = 1
+            data.raw['ammo-turret']['railgun-turret'].starting_attack_speed_secondary = 1
+            data.raw['ammo-turret']['railgun-turret'].starting_attack_speed_when_killed = 1
         end
 
         if mods['elevated-rails'] then
@@ -874,6 +878,11 @@ if settings.startup['PHI-SA'].value then
                     v.effect.quality = nil
                 end
             end
+
+            for _, v in pairs(data.raw['inserter']) do
+                v.extension_speed = v.extension_speed * 2.5
+                v.rotation_speed = v.rotation_speed * 2.5
+            end
         end
     end