rocketbob
Well Known Member
Flew three test flights yesterday, but could not fly high due to low ceilings. The Rotec TBI continues to impress me with low fuel flow numbers, perfect behavior with rapid throttle movements, easy starting, and general smoothness.
Prior to the upgrade it was easy to cause the CHT to go 425-450 by holding takeoff power for extended periods. Now it won't go past 390 and I ran full power for 30 minutes straight and level. Have also done several 100kt extended climbs and it stays cool, under 400.
At cruise, seeing 340-350 CHT.
The carb which was replaced was a MA4-5 3878 (not a 3878N). My RV-6 had a 4164 which had the main jet more appropriately sized for the RV and even that never ran as nice as this is now running.
Prior to the upgrade it was easy to cause the CHT to go 425-450 by holding takeoff power for extended periods. Now it won't go past 390 and I ran full power for 30 minutes straight and level. Have also done several 100kt extended climbs and it stays cool, under 400.
At cruise, seeing 340-350 CHT.
The carb which was replaced was a MA4-5 3878 (not a 3878N). My RV-6 had a 4164 which had the main jet more appropriately sized for the RV and even that never ran as nice as this is now running.