Are the oils going to be tested on the dyno? In my experience the bigger the test wood the harder it is to get consistent times. If the saws are going to Chad anyway, whey not just run them on the dyno? That way chain and test wood abnormalities are eliminated.
I know all the work you're putting in is substantial. My advice to you, is to take your time and make sure things are right before you post the data. You know we'll all be looking for all the holes, that's what we do.
Running a chain on a grinder or filing the chain can and will change how the chain cuts. It's best to use the same chain or chain off the same spool.
diff oils on dyno - no, not that i know of. I don't know where Chad is located but guessing it's a ways from where I am.
consistent time big wood - I've not had that problem. But I am considering going to 28" instead of 36". It would make finding wood easier and I could do more cuts and generate more heat..maybe.
I have a test I still have to do to try and gauge how much heat is generated at each bar length. So I was going to do a test: 20 vs 24 vs 28 vs 30 vs 36" in the same logs and take temps and see if shorter or longer bars make more heat on the 661. Pretty sure they do from what I've seen.
I plan on using 1 carbide chain for each oil test. The 10 or so cuts I do isn't going to dull a carbide at all and thus affect the times where a regular chain it's much much more possible. I've gotta see how the stuff cuts first though...since it's safety chain. If it doesn't cut right. Then I'll go to a 28" .404 RS setup and do 1 chain per ratio.
Granted a regular chain may only change by maybee 1 second over 10-15 cuts. But I don't want that variance at all. The time it takes to do this test...isn't worth cutting a corner like that.