diff --git a/selfdrive/test/process_replay/model_replay.py b/selfdrive/test/process_replay/model_replay.py
index ecfacbf5d2..a63ec6489b 100755
--- a/selfdrive/test/process_replay/model_replay.py
+++ b/selfdrive/test/process_replay/model_replay.py
@@ -22,7 +22,7 @@ from tools.lib.logreader import LogReader
 
 TEST_ROUTE = "4cf7a6ad03080c90|2021-09-29--13-46-36"
 SEGMENT = 0
-MAX_FRAMES = 100 if PC else 1300
+MAX_FRAMES = 100 if PC else 600
 
 SEND_EXTRA_INPUTS = bool(os.getenv("SEND_EXTRA_INPUTS", "0"))
 
@@ -149,9 +149,9 @@ if __name__ == "__main__":
   # load logs
   lr = list(LogReader(get_url(TEST_ROUTE, SEGMENT)))
   frs = {
-    'roadCameraState': FrameReader(get_url(TEST_ROUTE, SEGMENT, log_type="fcamera")),
-    'driverCameraState': FrameReader(get_url(TEST_ROUTE, SEGMENT, log_type="dcamera")),
-    'wideRoadCameraState': FrameReader(get_url(TEST_ROUTE, SEGMENT, log_type="ecamera"))
+    'roadCameraState': FrameReader(get_url(TEST_ROUTE, SEGMENT, log_type="fcamera"), readahead=True),
+    'driverCameraState': FrameReader(get_url(TEST_ROUTE, SEGMENT, log_type="dcamera"), readahead=True),
+    'wideRoadCameraState': FrameReader(get_url(TEST_ROUTE, SEGMENT, log_type="ecamera"), readahead=True)
   }
 
   # run replay