diff --git a/Appli-iso3dfd/ACO.py b/Appli-iso3dfd/ACO.py
index 204cdd63a37038a6361047d441b0861d13579c87..377064882c90e2b36df7b62864e37112afbde47d 100644
--- a/Appli-iso3dfd/ACO.py
+++ b/Appli-iso3dfd/ACO.py
@@ -150,14 +150,14 @@ if __name__ == "__main__":
     rho = 0.1
     Q = 0.1
     nb_ants = 2
-    tau_0 = Q*100
+    tau_0 = Q*300
     n_iter = 1
     fancy_strategy = "AS" 
 
     # Parameters for compilation and execution of iso3dfd
     nb_threads = 8
     reps = 100
-    n1_max, n2_max, n3_max = 256, 256, 256
+    n1_max, n2_max, n3_max = 512, 512, 512
     optimization = "-O3"
     simd = "avx512"