one.man.band
ArboristSite Guru
Red..... for whatever its worth. First off, I did some temperature testing a couple of years ago, my end results were very similar to the results you have posted up within this thread. (my results are buried somewhere within another forum).
At the time, was interested in the max temp in a box muffler, with a saw under heavy load. Also, found how long it took from a cold start to reach that temp, but was unable to record times on the rate of cool down, which was due to just how rapidly the motor cools down when chain is pulled out of the cut, (as rpms decrease down to idle speed).
My take on your latest testing methods differs with some of the folks who have commented so far.
From what I see, you have good consistency in your results. A 7% total spread of results, by any testing methodology, imo, is about as good as can be expected. For that matter, have seen a 10% spread on 3 consecutive runs, minutes apart on the same dyno, with zero changes made to the motor. About 3% is quite more common norm. (4ST on dynojet). 2ST results from a brake style are about useless, imo. Aircooled 2ST lose power, the longer they are run. In about 20 minutes 20% down. Would tend to think, as the case gets heat soaked, order in which the different oils were tested would have an influence on results?
(If, you have done so, and I have missed it buried in the thread somewhere, sorry and please disregard the following).
If you are still reading this, common to testing is to establish a baseline to find the amount of % error in the testing method used. (Maybe this will calm the naysayers). Keeping this in mind, a baseline oil is chosen. Any oil. The **** gets tested out of it. Say it went through 10 tests using your methods. Then the amount of spread % and then average spread % is figured out. Since its the same oil, the % spread/average spread, is only showing the swing of your testing method. The results you have shared so far would have more impact. Baseline does not need to be established before actually takes place, and can be done at any time.....but is common to do beforehand.
I do not care what oil anyone uses, just like testing and numbers. Talking about BTU's, curves and whatever else is interesting, but has little influence on the tests since the same fuel was used. Would rather take interest in a curvy woman.
(Put me on ignore, dgaf).
At the time, was interested in the max temp in a box muffler, with a saw under heavy load. Also, found how long it took from a cold start to reach that temp, but was unable to record times on the rate of cool down, which was due to just how rapidly the motor cools down when chain is pulled out of the cut, (as rpms decrease down to idle speed).
My take on your latest testing methods differs with some of the folks who have commented so far.
From what I see, you have good consistency in your results. A 7% total spread of results, by any testing methodology, imo, is about as good as can be expected. For that matter, have seen a 10% spread on 3 consecutive runs, minutes apart on the same dyno, with zero changes made to the motor. About 3% is quite more common norm. (4ST on dynojet). 2ST results from a brake style are about useless, imo. Aircooled 2ST lose power, the longer they are run. In about 20 minutes 20% down. Would tend to think, as the case gets heat soaked, order in which the different oils were tested would have an influence on results?
(If, you have done so, and I have missed it buried in the thread somewhere, sorry and please disregard the following).
If you are still reading this, common to testing is to establish a baseline to find the amount of % error in the testing method used. (Maybe this will calm the naysayers). Keeping this in mind, a baseline oil is chosen. Any oil. The **** gets tested out of it. Say it went through 10 tests using your methods. Then the amount of spread % and then average spread % is figured out. Since its the same oil, the % spread/average spread, is only showing the swing of your testing method. The results you have shared so far would have more impact. Baseline does not need to be established before actually takes place, and can be done at any time.....but is common to do beforehand.
I do not care what oil anyone uses, just like testing and numbers. Talking about BTU's, curves and whatever else is interesting, but has little influence on the tests since the same fuel was used. Would rather take interest in a curvy woman.
(Put me on ignore, dgaf).
damn andy stop holding out on us! 
