diff --git a/engines/release/_calib_c.json b/engines/release/_calib_c.json
index 480f0d2..d19b77c 100644
--- a/engines/release/_calib_c.json
+++ b/engines/release/_calib_c.json
@@ -1 +1 @@
-{"n_atoms": 120, "nt": 1000000, "step_time": 0.0009682028412818909}
\ No newline at end of file
+{"n_atoms": 40, "nt": 10000, "step_time": 0.00015027170181274412}
\ No newline at end of file
diff --git a/engines/release/c.json b/engines/release/c.json
index 8e2bdd8..897910a 100644
--- a/engines/release/c.json
+++ b/engines/release/c.json
@@ -1,8 +1,8 @@
 {
   "box_a": 300.0,
-  "NT": 1000000,
+  "NT": 10000,
   "DT": 0.001,
-  "NSTEP": 500,
+  "NSTEP": 20,
   "warmup_steps": 0,
   "method": "leapfrog",
   "G": [
@@ -11,14 +11,14 @@
     0.0
   ],
   "B": [
-    0.01,
+    0.005,
     0.0,
-    0.01
+    0.005
   ],
   "gravity_field": 0,
   "gravity_interaction": 0,
   "elastic_force": 1,
-  "damping_force": 1,
+  "damping_force": 0,
   "gravity_strength": 1.0,
   "driving_force": 1,
   "save_trajectory": 0,