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  Please keep in mind the 170 is the same, CDI or not, but if you run the low oil version, any percentage of oil you reduce you will gain in alcohol and nitro, for example, if you change from 23% oil to 10% oil a gain of 13% on methanol and nitro will happen, and that will increase the engine power.</p>

  I read all posts where the engine performance is mentioned, but the fuel and the engine set up is the most important factor, but I don't see it much mentioned, as well as how the throttle curve changes with the prop selection.</p>

  I really think even the engine can move a 19x11, It does not do it with the acceleration speed or throttle response/accuracy that has with the 17x13, the latest being the one I prefer, but I'm using 30/23 fuel, if I would change to 30/10 or a little more oil I would consider using the 19 prop, otherwise I would not.</p>

  Most people think they can load an engine because the engine is powerful , without knowing exactly how is the engine actually being performing in comparison to well tune and set up engines. </p>

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