Chirping Noise during Idle RCV-58
Hello,
I have purchased a RCV58CD and a RCV91CD the 58 for use in a Great Planes Escapade, and the 91 for a VQ P-40. I have only run the 58 so far. Doing the running in procedures. It seems to run really well... Just have one question after running at the prescribed 6000 rpm per the manual, I bring it back to idle and let it cool a bit during the idle maybe 60-120 seconds. During the idle the engine will have a "Chirping"sound that goes away if you bump the throttle up a little bit and bring it back down and it will slowly come back. Is this bad or is this just kind of normal run in sounds. Engine runs really good, seems to have alot of power. I am running rich like the manual said. I did adjust the low end needle after the first hour of running in, per the manual to lean out the mid range a little bit... Seems to have gotten much more powerful. But that quirky chirp happens around 2100-2350 rpm, it seems to vibrate much more when it makes this sound.
Thank you-
Erik