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Old 10-26-2009, 03:47 PM   #1
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Default How hard is it to tune a new engine

I just got my new engine for my nitro Rustler and im scared of ruining it. How can I learn how to tune it? I dont understand the clockwise stuff.
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Old 10-26-2009, 03:54 PM   #2
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follow these two threads:

start with: http://www.rctech.net/forum/nitro-of...eak-bible.html

then go onto: http://www.rctech.net/forum/nitro-of...ing-bible.html

its not too hard if you stick to the instructions and use some common sense. just keep asking questions if you get stuck
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Old 10-26-2009, 03:59 PM   #3
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Here are a couple threads that will help you out alot.



Bascially the way you tune the motor is through the needles. You turn them clockwise to lean the mixture and counter clockwise to richen's the mixture. Before you start tuning the motor for performance you are going to want to break it in. That thread above will show you how to do it.

Here is a video on how to tune a motor, the vehicle and motor are different but the principles are the same.

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Old 10-26-2009, 04:07 PM   #4
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The most important thing when it comes to nitro engines is the break in process. There are tons of articles telling you how to properly break in a new engine. The best method is to follow the instructions that come with the engine / model. After the break-in process is over, you can start tuning for performance. With 2 needle carbs, ALWAYS START tuning with the high speed needle first, as it affects the whole power-band. Once you find a good point to where you are high in the RPM's with blue smoke, then start adjusting the low speed. You'll only probably need 1/8th of a turn. Here's a rule of thumb: Left hand turns = Richen fuel mixture. Right hand turns = Lean fuel mixture. That goes for both needles. Finally adjust the idle setting according to the manual. A 1 mm opening is usually the biggest you'll need for idle. All adjustments should be made in 1/8 turn increments. Another rule of thumb is to break in the engine with the same fuel you plan to use. A good 20% nitro, 16% oil content will do fine. If you follow the instructions, you'll be fine. Have fun,.....oh, go easy on the pull starter (if so equipped..LOL)
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