ORIGINAL: akschu
Okay,
Got my cline regulator installed tonight and did some tuning. Currently I'm running the needle out 3/4 of a turn and the mixture out 2.5 turns from closed with the barrel closed. The engine seems to idle lean and it makes the dull brrrrr sound instead of your typical 2 stroke idle with the periodic misses. When I go to full throttle it jumps up instantly, and starts to build rpms pretty fast until it gets to about 1000 rpm shy of max then hesitates though that last little bit. I was thinking I my have too much timing with an OS 8 plug and 15% fuel so I tried the cold F plug just for kicks but it didn't seem to make any difference.
Here is the setup:
15% omega
APC 18x6w
cline regulator
bisson pitts muffler with tapperd ends cut off.
The engine ran well and peaked at 9150 rpm so this combo works, just need to work out that last little bit of transition.
Anyone else with a similar setup care to post their setup so I can compare notes?
Thanks,
schu
Do you mean you tried the colder A5 plug? The F one is hot.
Are you willing to try another prop? I like a good wood 18x6 like Skorepa or BME ect. I think with a heavy prop like the APC18x6W you my find a slight drop in transition on the OS160FX after 8,000 as I think you are getting over the torque peak? [&:] How long does it take to get that last 1000?
Sometimes when my high end is too rich I find that the last 300 or so rpm's take a while to get, but not the last 1000?
Make sure you test your settings by trying to simulate the throttle as if you were flying.