I was getting low voltage and found Alt belt was loose. Fixed that problem, but, when I took it up I was only getting 800 deg. max on EGT's. They were all showing 800. I noticed that when I put a load on alt. the temps would all rise about 4 degrees and go back to 800 when load was removed. Cant imagine this having anything to do with alternator belt tension. Any ideas? This is a dynon 180 showing all four cylinders on o360.