FW: Best fuel for OS140Rx

[Koenig, Tom]

Amram,
The best performing fuel I have seen in these engines is when the fuel is mixed by the owners. Use the BLUE cool power oil at 15-16 %. Nitro seems to be more than acceptable at 10%. Use 15% if  needed. Higher you may need to experiment with headshims.

I would recommend that you do NOT entertain the idea of the KL198 unless you want to commit your engine to the bin.

I will also go out on a limb here and state that the CP heli is not as good on engine life as homebrew using the blue oil. I run a 140 DZ and have just re-built the engine after 2.5 years of strong and steady service( I really cannot complain!) but I must say that the wear and deposits are far more than I have experienced over the past 15 years in ANY engine using my own homebrew utilising the blue oil. Should I choose to run the 160 Dz...I will gladly sacrifice a little rougher idle for better engine wear.
If you mix your own fuel, make sure you use quality ( the purest) nitro and methanol available. VP is a great nitro and avoid any methanol with acetone in it.

Tom




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