diff --git a/GameData/RealismOverhaul/Engine_Configs/Merlin1_Config.cfg b/GameData/RealismOverhaul/Engine_Configs/Merlin1_Config.cfg
index f42da90b2f..98e634e358 100644
--- a/GameData/RealismOverhaul/Engine_Configs/Merlin1_Config.cfg
+++ b/GameData/RealismOverhaul/Engine_Configs/Merlin1_Config.cfg
@@ -588,6 +588,7 @@
 				ignitionReliabilityEnd = 0.997813
 				cycleReliabilityStart = 0.983701
 				cycleReliabilityEnd = 0.997426
+    				ignitionDynPresFailMultiplier = 7.0      //Assume v 1.1 engines needed lower restart speed than FT engines (90% @85 kPa)
 				techTransfer = Merlin1CVac,Merlin1C,Merlin1BVac,Merlin1B,Merlin1A:50&Merlin1DVac:100
 			}
 		}
@@ -661,6 +662,7 @@
 				ignitionReliabilityEnd = 0.999622
 				cycleReliabilityStart = 0.997077
 				cycleReliabilityEnd = 0.999538
+    				ignitionDynPresFailMultiplier = 8.0     //(95% @75Kpa)
 				techTransfer = Merlin1D,Merlin1CVac,Merlin1C,Merlin1BVac,Merlin1B,Merlin1A:50&Merlin1DVac+:100
 			}
 		}
@@ -737,6 +739,7 @@
 				ignitionReliabilityEnd = 0.999760
 				cycleReliabilityStart = 0.995415
 				cycleReliabilityEnd = 0.999276
+        			ignitionDynPresFailMultiplier = 9.0    //(96.5% @75Kpa)
 				techTransfer = Merlin1D+,Merlin1D,Merlin1CVac,Merlin1C,Merlin1BVac,Merlin1B,Merlin1A:50
 			}
 		}