diff --git a/cmd/solver-tune/main.go b/cmd/solver-tune/main.go
index ac97c02..9e49961 100644
--- a/cmd/solver-tune/main.go
+++ b/cmd/solver-tune/main.go
@@ -144,8 +144,8 @@ func printStats(label string, results []runResult, runs int) {
 func main() {
 	dir := flag.String("dir", "tmp", "directory with trip/students/constraints JSON files")
 	runs := flag.Int("runs", 20, "number of solver runs per parameter set")
-	numRandom := flag.String("random", "50", "comma-separated random placement counts")
-	numPerturb := flag.String("perturb", "750", "comma-separated perturbation counts")
+	numRandom := flag.String("random", "100", "comma-separated random placement counts")
+	numPerturb := flag.String("perturb", "1500", "comma-separated perturbation counts")
 	perturbMin := flag.Int("pmin", 3, "perturbation min groups")
 	perturbMax := flag.Int("pmax", 8, "perturbation max groups")
 	flag.Parse()
diff --git a/solver/solver.go b/solver/solver.go
index 026b79c..ccf12fa 100644
--- a/solver/solver.go
+++ b/solver/solver.go
@@ -21,8 +21,8 @@ type Params struct {
 }
 
 var DefaultParams = Params{
-	NumRandom:  50,
-	NumPerturb: 750,
+	NumRandom:  100,
+	NumPerturb: 1500,
 	PerturbMin: 3,
 	PerturbMax: 8,
 }