Knock Knock

[Glen Crisp]

Hey guys, I wonder if you can help me with another problem with my 87 GN. I received my heavy duty actuator last week from you and installed it. (fit perfect) I was able to increase my boost to the targeted 23 psi with my Alky control system. However I am still getting some knock (2-4 degrees) in 3rd at the top of the gear. I have the alky set about 6 on the blue knob and have moved it up to the max setting and it seams to get worst. I changed the plugs and noticed they look rich. My fuel pressure is set at 43 lbs with vacuum plugged. One other thing when I turned the alky back to 2 or 3 it seam to get better. My air/fuel seams to be in the area of 815 @ WOT 3 gear. Jose at alky control seams to think I should continue to increase the boost until it leans out. I am a little worried that I could loose a head gasket if I go much over 23 psi. As always Thanks for your help.