diff --git a/Appli-iso3dfd/ACO.py b/Appli-iso3dfd/ACO.py
index 37ea2c758295021770ee7b49cfe74ecdc74a734e..df650a3c161a629d7fac3846eec55d5a008f7ea9 100644
--- a/Appli-iso3dfd/ACO.py
+++ b/Appli-iso3dfd/ACO.py
@@ -114,14 +114,14 @@ 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"