diff --git a/hbs2-core/lib/HBS2/Defaults.hs b/hbs2-core/lib/HBS2/Defaults.hs
index 97dc07fd..34dc7125 100644
--- a/hbs2-core/lib/HBS2/Defaults.hs
+++ b/hbs2-core/lib/HBS2/Defaults.hs
@@ -16,7 +16,7 @@ defBurst :: Integral a => a
 defBurst = 4
 
 defBurstMax :: Integral a => a
-defBurstMax = 256
+defBurstMax = 128
 
 -- defChunkSize :: Integer
 defChunkSize :: Integral a => a
@@ -58,11 +58,11 @@ defBlockInfoTimeout = 2
 
 -- how much time wait for block from peer?
 defBlockWaitMax :: Timeout 'Seconds
-defBlockWaitMax = 5.0 :: Timeout 'Seconds
+defBlockWaitMax = 2.5 :: Timeout 'Seconds
 
 -- how much time wait for block from peer?
 defChunkWaitMax :: Timeout 'Seconds
-defChunkWaitMax = 1.0 :: Timeout 'Seconds
+defChunkWaitMax = 0.35 :: Timeout 'Seconds
 
 defSweepTimeout :: Timeout 'Seconds
 defSweepTimeout = 30 -- FIXME: only for debug!
diff --git a/hbs2-peer/app/BlockDownload.hs b/hbs2-peer/app/BlockDownload.hs
index 7265098c..05b0e028 100644
--- a/hbs2-peer/app/BlockDownload.hs
+++ b/hbs2-peer/app/BlockDownload.hs
@@ -320,10 +320,11 @@ downloadFromWithPeer peer thisBkSize h = do
 
         else do
 
-            liftIO $ atomically $ modifyTVar (view peerErrors pinfo) succ
+            -- liftIO $ atomically $ modifyTVar (view peerErrors pinfo) succ
             updatePeerInfo True pinfo
 
-            newBurst <- liftIO $ readTVarIO burstSizeT
+            newBurst' <- liftIO $ readTVarIO burstSizeT
+            let newBurst = floor (realToFrac newBurst' * 0.5 )
 
             liftIO $ atomically $ modifyTVar (view peerDownloaded pinfo) (+chunksN)
 
@@ -401,7 +402,7 @@ updatePeerInfo onError pinfo = do
                               $ if eps == 0 then
                                    ceiling $ realToFrac bu * 1.10 -- FIXME: to defaults
                                  else
-                                   floor $ realToFrac bu * 0.70
+                                   floor $ realToFrac bu * 0.55
                     else
                       max defBurst $ floor (realToFrac bu * 0.75)
 
@@ -445,7 +446,7 @@ blockDownloadLoop env0 = do
 
 
   void $ liftIO $ async $ forever $ withPeerM e do
-    pause @'Seconds 0.5
+    pause @'Seconds 5
 
     pee <- knownPeers @e pl
     npi <- newPeerInfo