Originally Posted by
Poppin Fresh
I got my very first GRP engine and it's very difficult for me to tune. I'm on my 9th tank now but it is very inconsistent. I am aware that the tuning is very different from Novarossi engines. Can you please give me a starting point on needle settings? I seem to have a good bottom end resposnse with a thick trail of smoke but it will go flat as soon as I start to reach the top end. I turn the HSN at 1 hour turns but it does not seem to work. Am I still running the bottom end too rich? Or do I need to go leaner on the HSN I would really appreciate your help. Thanks in advance.
If it is going flat on top, then I would suggest richening it quit a bit (3-4 hrs) to see if it gets better. If its goes too rich, you can always lean it out again. Rich is better than lean. Once you get the top right, you can readjust the lsn.