I need some tips on the round abouts of tuning engines. I have a "tower" .75 ABC that i am going to put in my 4* 60. Any advise would be GREAT!!!

Are you asking how to tune, or break in? If you are asking about tuning, then do you need help with low end or high end adjustment, or both? Is the engine new? thanks.

I need help tuning it!

You have to be a little more specific.

Sorry, My instructor tuned my last model engine so I need to know how to do everything! If you could give me some tips and pointers I would be greatfull.

I guess I have the same interest in learning how to tune an engine using the high and low end needles.

In my specific situation, I have an OS .46AX. It does very well when you open it up all the way to full throttle - revs up nicely and not much exhaust smoke. However, when you bring it down to idle, it dies. I have to keep a little extra throttle to keep it from dying.

So is this why they call them the low and high end needles? The high end is used for adjusting with the throttle wide open and the low end needle to adjust near idle?

How about rich vs. lean? Does "rich" mean there is a greater amount of fuel mixed with the same amount of air, and "lean" mean relatively less fuel for the same amount of air?

If you need to know "everything", then I think you need more than tips and pointers. Instead of asking someone here to rewrite the book for you, you might consider a study of the information that has already been assembled.

Start with the instructions that came with your engine - if you bought it new. They'll tell you most of what you need to know if you read it.

Next, use the search feature here at the forum. Search on "engine tuning". You'll get lots of information. Or consider just going to the [link=http://www.rcuniverse.com/forum/forumid_114/tt.htm]Glow engine forum[/link] and start reading some of the many posts on engines and engine tuning.

Look, I don't mean to be harsh on you. But, if you need to know everything then you need to provide a bit of initiative. The information is already available. Look for it and read it.

Yeah, there are alot of threads on the subject with a great guide on how to tune by Daunte. Search, Search, Search!

I apologize. I was trying to help stimulate the conversation because DownSideUp requested more information from the original poster, who didn't respond. I didn't mean to waste your time. If you didn't want to type your advice, it would have been easier to not type anything at all. Eventually I would have taken the hint and looked elsewhere.

I only asked my question because apparently others (at least the original poster) had similar questions, and others offered to answer if there were a few more specifics given.

Some people like to help others out. Someday when someone asks the same questions, I would like to be able to respond with the knowledge that I learned rather than to just tell someone to "go look it up yourself". In turn, that person can share knowledge to the person who may ask him some day. After all, I thought this was the beginner's forum.

You have nothing to apologize for!

If you have a question that has been asked many times before then the beginners forum is the right place to ask it!

Who are these advertisers going to sell their crap to if beginners don't come here and ask the same questions over and over and over!!!

If you new guys don't ask these questions repeatedly then all us free loaders may have to start paying to come here and goof off!

What Zombie was trying to say is that this question gets asked about once a week (or more) and it's been beat to death. Everything you could possibly want to know is already contained here in RCU's Beginner Forum if you will do a search on "engine AND tuning"--follow the follwing links for more info:

Break-in: http://www.rcuniverse.com/forum/m_18...tm.htm#1850473

Tuning: www.jettengineering.com (follow link for "tech specs & instructions")

Good Luck! If you don't find what you're looking for, by all means come back and ask away--I don't think you'll find any shortage of folks here who are willing to help a newb!

Thanks for the advice. I did find a nice message authored by Dauntae that explained his method for engine tuning in detail. It was very informative.

It turns out that I was correct about the purpose of high and low end needles and the definitions of rich and lean.

Now lets all get out there and fly.

Seems to me that it would be way more usefull to have your instructor that tuned it for you show you what to do while it is running. You get to hear what is happening, see what he is doing, and have him explain it all at the time he is doing it. You can get some generalizations on here, but there is no substitute for actaully having someone there showing you what both needles do on your engine.

I'm more than willing to answer questions numerous times. I think Zombie's reasoning is that, this question in particular can take 5 or 6 lo-o-ong paragraphs to answer adequately, and if his rate of typing is as bad as mine, we're talking 20 minutes or more to answer the question. (I know becasue I've answered it a few times already. )

CrashBurn,
I also think that your instructor should have explained what he was doing and why while tuning your engine, or you should have asked what he was doing and why.

However, if the links didn't clarify things sufficiently, please do ask and I, or someone else, will surely answer the remaining questions.
Dennis-

Everything I have seen on tuning is making this process way to complicated. I can tune a .46FX so I'll tell you my very un-scientific method.

-First warm it up some.
-Open her wide up and richen(counter clockwise the high end needle) until it noticeably drops in pitch.
-Then lean until it picks up pitch. Go a couple of clicks past.
-Now let it idle down for 15 seconds or so. Give it full throttle.
-If it transistions poorly lean it out a 1/8 turn. Try again until it transitions well.
-If you think the low end is lean, richen until it transitions poorly then slowly lean until it transitions well.

I'm sure there are some probs with this but it is easy and works for me. No rocket science here.

thanks DBcherry, The reason i ask is because after i soloed i never got a chance to ask him because he moved. and since then i've just been busy building my four*. but i will check the engine forums!

Thanks everyone