The first flight(s) of N29JV have gone off very well. (I have yet to write up a first flight report). No significant issues. Plane flies straight and true hands off. All electronics and instrumentation work fine (Dynon Skyview system, GNS430W and PAR100EX radio/audio panel/intercom). However, I have been experiencing high CHTs on climbs, particularly the intial climb, on all but cylinder 3. Typical temperatures in cylinder order for initial climb on an 80 degree day at IAS of 130 are 420, 422, 373, 409. Typical cruise temps - 370,375,370,371 or lower. Cylinder 3 consistently runs in the 360 to 370 range climb or cruise.
I have meticulously sealed all gaps between baffle and engine and replaced sagging baffle seal made up of the material supplied with Vans FWF kit with the heavier 1/8 silicon fiberglass reinforced material from ACS, which slightly improved temps.
Regarding break in (the engine is a new Lycoming O-320), oil consumption appears to stabilized after 14 hours.
I am looking for suggestions regarding 1) why temperatures are high in climb and 2) what would explain the behavior of cylinder 3 which run so much cooler than the others in climb and does not very much between climb and cruise.
John
I have meticulously sealed all gaps between baffle and engine and replaced sagging baffle seal made up of the material supplied with Vans FWF kit with the heavier 1/8 silicon fiberglass reinforced material from ACS, which slightly improved temps.
Regarding break in (the engine is a new Lycoming O-320), oil consumption appears to stabilized after 14 hours.
I am looking for suggestions regarding 1) why temperatures are high in climb and 2) what would explain the behavior of cylinder 3 which run so much cooler than the others in climb and does not very much between climb and cruise.
John