Originally Posted by
jeff_ellis_9
so you mostly go by smoke and sound right?
Also, about the smoke, is that for the HSN setting ONLY? Or can the LSN have a real effect on the smoke?
Yes the low speed needle can have an effect on the smoke trail if it's set too rich and can cause you to set your HSN too lean. When you take off with an idle mixture thats too rich the engine gets supplied by the excess fuel and you have a good smoke trail to start with so you think the HSN is tuned right. What ends up happening is the engine keeps getting hotter and hotter during your run because of the lean HSN you didn't know you had.
Go to this link, it's the tuning guide at the top of this forum and read through the guide it will help you like nothing else.....
http://www.rctech.net/forum/nitro-of...ing-bible.html