The extra set of tests took some time, but I've got the results, and they actually line up pretty close to my heat calculations that I made for the different thruster types.
Procedure:
For this set of tests the same initial procedure as the previous silent running tests. The test began with the throttle at 100%, however instead of leaving the throttle at 100%, it was altered to -100% before max cruising speed could be reached. Once the ship neared the maximum reverse speed, the throttle was moved back to 100%; this process was repeated until the ship heat reached 100% at which point the timer was stopped.
Results:
Conclusion:
The T-Test in this case indicates that there is a significant difference between dirty drives and the other two drive types tested. However, it is worth noting that Clean drives did not perform significantly better than the standard drives in silent running in any of the tests performed. Taking into account that Clean drives also have an optimal multiplier increase it can be concluded that clean drives are the superior choice if the ship is intended to spend prolonged periods of time in silent running. In any situation that does not involve spending long periods of time in silent running dirty drives are the superior choice.
In conclusion, clean drive tuning is not a "useless" mod as I originally asserted as it has a niche use in silent running. However, clean drive tuning does have a misleading name in so far that clean drives
do not provide any advantage over dirty drives outside of silent running.
Recommendation:
In light of this I recommend that the name of "Clean Drive Tuning" be changed to something along the lines of "Enhanced Silent Drive Tuning" to more stress what role they are useful in. I also advocate for the creation of a new drive mod: "Efficient Drive Tuning" which would reduce thruster mass, thermal load, and power draw; this mod should also reduce drive integrity and potentially the optimal multiplier. This new efficient drive tuning would be the mod of choice for explorers who wish to increase their fuel economy and keep their heat low for fuel scooping near stars.