Electronics International UB-16

[c170b53]

Just finishing the install of a UB-16 E.I. engine monitor (my old EGT gauge died) and I would just like to express my delight in the kit supplied and the products produced by this company. In reading their material there's several ways to lean the engine precisely and with their gauges its possible to observe the results. Only problem is now I may have too much info and I now need a course on how to operate the monitor.

[cessna170bdriver]

I'm very happy with mine also. I also installed the data recording option, but don't have a computer portable enough to download it.

Miles

[N2782C]

Do you find that at full power the #2 cylinder is running a much hotter EGT than the others...like around 1450F? In cruise it settles down to maybe 50F above the others?

[cessna170bdriver]

#2 and #5 run fairly close to one another, but it seems like my #5 is usually the hottest EGT by 25-50 degrees (and the first to peak when leaning), but #2 ocassionally steps in. Usually in the 1300's rich in the climb, and mid 1400's leaned, 2500-2600 RPM, 6 to 8 thousand feet MSL. I have about 115 SMOH on new ECI Titan cylinders.

Miles

[N2782C]

My #5 cylinder also generally peaks first. I you look at the induction system it makes sense. It's almost as if cylinders 2 and 4, 3 and 5 share a common duct initially. I've run every test know to man on the #2 cylinder, smoke test, cold exhaust valve lash, spark plug, changed the probes out....nothing. I normally run in the mid 1300's in cruise...all cylinders. I run between 50 and 75 rich of lean. My cylinders are ECI as well and have about 95 hours on them with a complete overhaul of the engine. Actually talked to Jim Bubba of ECI at OSH and he is baffled by the EGT on #2. He was sure it was the cold valve lash on the exhaust.

Just gonna have to live with somewhat primitive, but satisfactory, induction system. The engine runs beautifully other than that. By the way, Cessna put the EGT single gauge on the #2 cyclinder...they knew it ran the hottest EGT.

[c170b53]

I think I was dumb and happy with a single egt gauge. The only problem with the EI unit is that it's too precise. With my lycoming, the EGT for two rear cylinders run almost 100F hotter than the front, the cylinder head temps are hotter for those cylinders with a spread of 30 Degs between the front and back. Humm, otherwise a great little unit.