diff --git a/Generators/share/egconfig/pythia8_NeNe.cfg b/Generators/share/egconfig/pythia8_NeNe.cfg
index fff1dbb5f3d59..75a77236f5b4e 100644
--- a/Generators/share/egconfig/pythia8_NeNe.cfg
+++ b/Generators/share/egconfig/pythia8_NeNe.cfg
@@ -1,8 +1,8 @@
 ### beams
 Beams:idA 1000100200	# Neon
-Beams:idB 1000100200    # Neon
-Beams:eCM 10720.	# GeV
+Beams:idB 1000100200	# Neon
+Beams:eCM 5360. 	# GeV
 
 ### decays
-ParticleDecays:limitTau0 on	
-ParticleDecays:tau0Max 10.	
+ParticleDecays:limitTau0 on
+ParticleDecays:tau0Max 10.
diff --git a/Generators/share/egconfig/pythia8_OO.cfg b/Generators/share/egconfig/pythia8_OO.cfg
index ff098e6b65135..9a4419309a800 100644
--- a/Generators/share/egconfig/pythia8_OO.cfg
+++ b/Generators/share/egconfig/pythia8_OO.cfg
@@ -1,7 +1,7 @@
 ### beams
 Beams:idA 1000080160    # Oxygen
 Beams:idB 1000080160    # Oxygen
-Beams:eCM 10720.        # GeV
+Beams:eCM 5360.         # GeV
 
 ### decays
 ParticleDecays:limitTau0 on	
diff --git a/Generators/share/egconfig/pythia8_pO.cfg b/Generators/share/egconfig/pythia8_pO.cfg
index aff9d3337cd9d..64efc6954b363 100644
--- a/Generators/share/egconfig/pythia8_pO.cfg
+++ b/Generators/share/egconfig/pythia8_pO.cfg
@@ -1,8 +1,10 @@
 ### beams
+Beams:frameType 2       # back-to-back beams of different energies and particles
 Beams:idA 2212          # proton
 Beams:idB 1000080160    # Oxygen
-Beams:eCM 13600.        # GeV
+Beams:eA 6800.          # Energy of proton beam in GeV moving in the +z direction
+Beams:eB 3400.          # Energy in GeV per Oxygen nucleon (6.8 Z TeV) moving in the -z direction
 
 ### decays
-ParticleDecays:limitTau0 on	
-ParticleDecays:tau0Max 10.	
+ParticleDecays:limitTau0 on
+ParticleDecays:tau0Max 10.
\ No newline at end of file