ORIGINAL: Kirkyboy
Hey guys,
Was wondering if anyone could give me a guide to setting the high end needle on my Irvine .46
I've read quite a few and they all say about leaning the mixture to max RPM and then richening a few clicks. Is this correct? I try to follow this but then dont get a smooth transition from low to high throttle. Is there also some sort of distinctive sound that gives away whether it is too rich or lean?
Help would be appreciated. May also post any decent reply up on club wall as I know a lot of beginners have trouble with this.
Paul,
What about the low-speed needle???
Oh, you didn't touch it? Most beginners tend to 'forget' it exists.
The low-speed needle controls and meters the mixture from idle to about 75-80% throttle.
It determined how the engine runs within most of the throttle's regime and even more important; how your engine will transition from one part-throttle setting to another and to full throttle...
Setting the high-speed only will only be effective at full throttle, so it is no wonder at all your engine doesn't respond at part-throttle. This since you have not bothered to adjust it there...
Please read the manual and search this forum about how to do the 'pinch test'. It is a popular method of finding a good starting setting for the low-speed needle.
Then adjust in very small increments, until the transition is just right.