diff --git a/firmware/tunerstudio/rusefi.ini b/firmware/tunerstudio/rusefi.ini
index dfd8d5e3ac..86afc14072 100644
--- a/firmware/tunerstudio/rusefi.ini
+++ b/firmware/tunerstudio/rusefi.ini
@@ -76,7 +76,7 @@ enable2ndByteCanID = false
    
  ; delayAfterPortOpen = 500  
    
-   blockingFactor = 400 ; max chunk size
+   blockingFactor = 256 ; max chunk size
 ;end communication settings
 
    ;  name      			= bits,   type, offset,  bits
@@ -85,7 +85,7 @@ enable2ndByteCanID = false
 
 ; see PAGE_0_SIZE in C source code    
 ; CONFIG_DEFINITION_START
-; this section was generated automatically by rusEfi tool ConfigDefinition.jar based on integration\rusefi_config.txt Thu Feb 27 03:14:33 EST 2020
+; this section was generated automatically by rusEfi tool ConfigDefinition.jar based on integration\rusefi_config.txt Fri Feb 28 18:11:43 EST 2020
 
 pageSize            = 20000
 page = 1
diff --git a/firmware/tunerstudio/rusefi.input b/firmware/tunerstudio/rusefi.input
index 0f5f4a35f0..425c2ba61c 100644
--- a/firmware/tunerstudio/rusefi.input
+++ b/firmware/tunerstudio/rusefi.input
@@ -76,7 +76,7 @@ enable2ndByteCanID = false
    
  ; delayAfterPortOpen = 500  
    
-   blockingFactor = 400 ; max chunk size
+   blockingFactor = 256 ; max chunk size
 ;end communication settings
 
    ;  name      			= bits,   type, offset,  bits
diff --git a/firmware/tunerstudio/rusefi_frankenso.ini b/firmware/tunerstudio/rusefi_frankenso.ini
index a41ffa317f..286363d714 100644
--- a/firmware/tunerstudio/rusefi_frankenso.ini
+++ b/firmware/tunerstudio/rusefi_frankenso.ini
@@ -76,7 +76,7 @@ enable2ndByteCanID = false
    
  ; delayAfterPortOpen = 500  
    
-   blockingFactor = 400 ; max chunk size
+   blockingFactor = 256 ; max chunk size
 ;end communication settings
 
    ;  name      			= bits,   type, offset,  bits
@@ -85,7 +85,7 @@ enable2ndByteCanID = false
 
 ; see PAGE_0_SIZE in C source code    
 ; CONFIG_DEFINITION_START
-; this section was generated automatically by rusEfi tool ConfigDefinition.jar based on integration\rusefi_config.txt Thu Feb 27 03:15:06 EST 2020
+; this section was generated automatically by rusEfi tool ConfigDefinition.jar based on integration\rusefi_config.txt Fri Feb 28 18:11:50 EST 2020
 
 pageSize            = 20000
 page = 1
diff --git a/firmware/tunerstudio/rusefi_kinetis.ini b/firmware/tunerstudio/rusefi_kinetis.ini
index 94953e3a60..0b258fafa6 100644
--- a/firmware/tunerstudio/rusefi_kinetis.ini
+++ b/firmware/tunerstudio/rusefi_kinetis.ini
@@ -76,7 +76,7 @@ enable2ndByteCanID = false
    
  ; delayAfterPortOpen = 500  
    
-   blockingFactor = 400 ; max chunk size
+   blockingFactor = 256 ; max chunk size
 ;end communication settings
 
    ;  name      			= bits,   type, offset,  bits
@@ -85,7 +85,7 @@ enable2ndByteCanID = false
 
 ; see PAGE_0_SIZE in C source code    
 ; CONFIG_DEFINITION_START
-; this section was generated automatically by rusEfi tool ConfigDefinition.jar based on integration/rusefi_config.txt Thu Feb 27 03:15:44 EST 2020
+; this section was generated automatically by rusEfi tool ConfigDefinition.jar based on integration/rusefi_config.txt Fri Feb 28 18:12:00 EST 2020
 
 pageSize            = 20000
 page = 1
diff --git a/firmware/tunerstudio/rusefi_microrusefi.ini b/firmware/tunerstudio/rusefi_microrusefi.ini
index 0fb78a2e6d..b495beacbf 100644
--- a/firmware/tunerstudio/rusefi_microrusefi.ini
+++ b/firmware/tunerstudio/rusefi_microrusefi.ini
@@ -76,7 +76,7 @@ enable2ndByteCanID = false
    
  ; delayAfterPortOpen = 500  
    
-   blockingFactor = 400 ; max chunk size
+   blockingFactor = 256 ; max chunk size
 ;end communication settings
 
    ;  name      			= bits,   type, offset,  bits
@@ -85,7 +85,7 @@ enable2ndByteCanID = false
 
 ; see PAGE_0_SIZE in C source code    
 ; CONFIG_DEFINITION_START
-; this section was generated automatically by rusEfi tool ConfigDefinition.jar based on integration\rusefi_config.txt Thu Feb 27 03:14:53 EST 2020
+; this section was generated automatically by rusEfi tool ConfigDefinition.jar based on integration\rusefi_config.txt Fri Feb 28 18:11:46 EST 2020
 
 pageSize            = 20000
 page = 1
diff --git a/firmware/tunerstudio/rusefi_prometheus.ini b/firmware/tunerstudio/rusefi_prometheus.ini
index 18d04bcc22..c1dc643396 100644
--- a/firmware/tunerstudio/rusefi_prometheus.ini
+++ b/firmware/tunerstudio/rusefi_prometheus.ini
@@ -76,7 +76,7 @@ enable2ndByteCanID = false
    
  ; delayAfterPortOpen = 500  
    
-   blockingFactor = 400 ; max chunk size
+   blockingFactor = 256 ; max chunk size
 ;end communication settings
 
    ;  name      			= bits,   type, offset,  bits
@@ -85,7 +85,7 @@ enable2ndByteCanID = false
 
 ; see PAGE_0_SIZE in C source code    
 ; CONFIG_DEFINITION_START
-; this section was generated automatically by rusEfi tool ConfigDefinition.jar based on integration\rusefi_config.txt Thu Feb 27 03:15:18 EST 2020
+; this section was generated automatically by rusEfi tool ConfigDefinition.jar based on integration\rusefi_config.txt Fri Feb 28 18:11:53 EST 2020
 
 pageSize            = 20000
 page = 1
diff --git a/firmware/tunerstudio/rusefi_proteus.ini b/firmware/tunerstudio/rusefi_proteus.ini
index 6155859f13..b800c4e0f2 100644
--- a/firmware/tunerstudio/rusefi_proteus.ini
+++ b/firmware/tunerstudio/rusefi_proteus.ini
@@ -76,7 +76,7 @@ enable2ndByteCanID = false
    
  ; delayAfterPortOpen = 500  
    
-   blockingFactor = 400 ; max chunk size
+   blockingFactor = 256 ; max chunk size
 ;end communication settings
 
    ;  name      			= bits,   type, offset,  bits
@@ -85,7 +85,7 @@ enable2ndByteCanID = false
 
 ; see PAGE_0_SIZE in C source code    
 ; CONFIG_DEFINITION_START
-; this section was generated automatically by rusEfi tool ConfigDefinition.jar based on integration\rusefi_config.txt Thu Feb 27 03:15:31 EST 2020
+; this section was generated automatically by rusEfi tool ConfigDefinition.jar based on integration\rusefi_config.txt Fri Feb 28 18:11:57 EST 2020
 
 pageSize            = 20000
 page = 1