diff --git a/data/gfx/nitro-smoke.xml b/data/gfx/nitro-smoke.xml
index bc990fd90..6118d72df 100644
--- a/data/gfx/nitro-smoke.xml
+++ b/data/gfx/nitro-smoke.xml
@@ -5,17 +5,17 @@
     
     <velocity  x="0.0"
                y="0.0"
-               z="-0.03"         />
+               z="-0.006"         />
     
     <material  file="smoke_nitro.png"  />
     
     <!-- Amount of particles emitted per second -->
-    <rate      min="1500"
-               max="2000"          />
+    <rate      min="500"
+               max="800"          />
     
     <!-- Minimal and maximal lifetime of a particle, in milliseconds. -->
-    <lifetime  min="30"
-               max="50"          />
+    <lifetime  min="100"
+               max="150"          />
     
     <!-- Size of the particles -->
     <size      min="0.20"
@@ -25,6 +25,6 @@
                max="255 255 255"  />
     
     <!-- How much time in milliseconds before the particle is fully faded out  -->
-    <fadeout   time="100"         />
+    <fadeout   time="75"         />
 
 </particles>
diff --git a/data/gfx/nitro.xml b/data/gfx/nitro.xml
index be4cdc148..a43a4c95d 100644
--- a/data/gfx/nitro.xml
+++ b/data/gfx/nitro.xml
@@ -10,12 +10,12 @@
     <material  file="nitro-particle.png"  />
     
     <!-- Amount of particles emitted per second -->
-    <rate      min="1500"
-               max="1700"          />
+    <rate      min="600"
+               max="800"          />
     
     <!-- Minimal and maximal lifetime of a particle, in milliseconds. -->
-    <lifetime  min="15"
-               max="25"          />
+    <lifetime  min="85"
+               max="120"           />
     
     <!-- Size of the particles -->
     <size      min="0.1"
@@ -28,6 +28,6 @@
                max="255 255 255"  />
     
     <!-- How much time in milliseconds before the particle is fully faded out  -->
-    <fadeout   time="5"         />
+    <fadeout   time="50"         />
 
 </particles>