Of course it is possible to run LOP without an all cylinder monitor...in the vast majority of cases it won't be possile without tuned injectors...but why would you want to?
How would you know that all the cylinders have actually passed over to the lean side of peak?
How do you know that the CHT is reading the hottest cylinder?..look closely at the picture I have posted and see that the triplex CHT is reading 330 odd while cylnder 2 & 4 are around 370F.
Without an all cylinder monitor you could easily have several cylinders safely LOP, a couple at peak and a few just ROP...how would you know?
A good mate of mine who owns an Aztec bought himself an EDM760 after flying in my Bonanza but held off on the Gamjectors due costs...he was absolutely astounded at how inaccurate the triplex style CHTs were and how high the actual CHTs got when leaning as per the manual...upwards of 450F on a few cylinders!!
He recently fitted the Gamis to fix that before it cost him an engine.
My IO550b cost AUD40K to overhaul with new Millenium cylinders...+ the cost of buying/installing the Gamis/EDM...probably all up another AUD10K...you just can't afford not to have this technology in the biger bore, injected flat4s and 6s...it's a completely false economy.
In my Beechcraft Flight Manual it specifically states NOT to lean beyond peak...it specifically recommends 50F ROP for 'best economy...it is wrong...even CASA says it is wrong now that they have been to ADA and seen the IO540 running on the test stand at GAMI.
From a VERY senior CASA engineerin dude (hint THE most senior) "We have learned more about what is going on inside these engines in the last little while than inthe last 40 years!"
Warranty?
My EDM records the last 25 odd hours of engine data at 6 second intervals...every EGT & every CHT & Fuel Flow...if it fails and a warranty claim is made I have all the data I need to prove not one limitation has been exceeded.
I have had very experienced engineers tell me that I will damge my engine operating LOP...they can't tell me how, it just 'will'!
Chuck.
Appologies for the missing letters and gaps...think i's time fora new key board
