Looks like fun, I get the boost creep but 18 psi doesn't sound like the end. If your timing retart is ok then I would move the cutoff to allow 18 psi and leave the boost control at 16. Running 110 octane could raise youre engine temp as is start to get to be a slow burn at that octane and low compression you get more heat on the cylinder walls and into the coolant. I usually buy the 96 when I have to at the track. Where are you getting youre oil temp? I would get it from the oil pan or tank. If you are getting it from a block port you may be getting a false reading. All in all I looks like a very successful outing.