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Tuning RC8RS (.28 Pro Engine)

Tuning RC8RS (.28 Pro Engine)

Old 04-25-2008, 12:44 PM
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Default Tuning RC8RS (.28 Pro Engine)

The manual for the engine says to start with 2 & 3/4 turns out on the high-speed and 6 1/4 turns out on the low speed needles. I did this for break-in. Then as I began to lean out the high end(in small increments) it ran hot (approx 270), but at idle still spit unburnt fuel and died periodically.

The experienced guys at my track said the low end seemed way rich, and I agreed. I turned the low speed in about 2 or 3 full turns and it runs/idles well now.

I asked Associated if the 6 turns out on the low-speed was a mis-print but they said no. However in my experience it seemed WAY rich there, and runs much better at around 3 turns out.

Anyone have experience with this engine, or any thoughts?

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Old 04-25-2008, 12:48 PM
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run it at whatever needle setting gives you the best performance.

factory settings are typically just for easy starting and break it, so noobies don't run it too lean.

one of my engine manuals said that the factory low speed needle was 8 turns out. Ya, 8 turns, the needle practially falls out. and out of the box, the low speed needle was 2.5 turns out.

just break it in using whatever method you want, then tune it til it performs well for you.
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Old 04-25-2008, 12:51 PM
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Yeah I had 1 of those, I say do what you need to get it running fine. It will make good power and hold its tune very long. TTR mills are in lots of peoples eyes one of the best RTR mills you can get.
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