[brucepick]

Do your grill block experiments with cardboard or stuff bits of pipe insulation between the slots (my current method) or coroplast. This makes it easier to change your mind and experiment.

I find I gradually need to add more blocking as deep winter sets in, and gradually remove it as things warm up in spring. I'm seeing coolant temp on the ScanGauge so I can tell what's going on. People with just a simple gauge are at a disadvantage on this.