I've an YIO-320 with Vetterman exhaust pipes; AFS EGT probes.
Per the AFS instructions, the EGT probes should be mounted between 2.5" and 3.5" from the exhaust pipe mounting flange.
Because the Vetterman pipes have an attachment bracket on the # 3 cylinder pipe that forces the installation of the EGT probe at the absolute minimum of 2.5" all four probes are, of course installed at that distance.
Now the question: What is the EGT variance from 2.5", 3.0", and 3.5"? I understand the temperatures further from the exhaust flange will be (significantly) lower but by how much? Since I have to mount the probes at the bare minimum, what should I be setting my EGT to for best leaning?
According to Lycoming the yellow zone is 1400 and max is about 1450. But where is that measured from?
So, if I adjust my EFIS to a higher set of EGT numbers, because my probes will be much closer to the flame, what should those settings be?
At this point, I try to lean to an EGT (# 1 cylinder always hottest) of 1398. But I feel I am burning too much fuel...
Suggestions from the engine experts is greatly appreciated.
Per the AFS instructions, the EGT probes should be mounted between 2.5" and 3.5" from the exhaust pipe mounting flange.
Because the Vetterman pipes have an attachment bracket on the # 3 cylinder pipe that forces the installation of the EGT probe at the absolute minimum of 2.5" all four probes are, of course installed at that distance.
Now the question: What is the EGT variance from 2.5", 3.0", and 3.5"? I understand the temperatures further from the exhaust flange will be (significantly) lower but by how much? Since I have to mount the probes at the bare minimum, what should I be setting my EGT to for best leaning?
According to Lycoming the yellow zone is 1400 and max is about 1450. But where is that measured from?
So, if I adjust my EFIS to a higher set of EGT numbers, because my probes will be much closer to the flame, what should those settings be?
At this point, I try to lean to an EGT (# 1 cylinder always hottest) of 1398. But I feel I am burning too much fuel...
Suggestions from the engine experts is greatly appreciated.