I have an RV-7 powered by a Superior IO-360 with 185 hp and a Hartzell constant speed prop.. About a month ago I noticed on take off that my egt readings were about 50 to 60 degrees higher than normal. Old reading was @ 1315 degrees F, 2660RPM, WOT, full rich and 460 ft above sea level. New readings 1365 degrees F with all other factors the same. I don't remember exact fuel flow numbers from original data but fuel flows now read 17.2 gph during above condition. It seems to me that fuel flow should be closer to 18.5. Am I screwing up the BSFC calculations? Pulled all injectors and cleaned both nozzle and restrictor in Hoppe's #9 as recommended and saw absolutely no change. The only change made to the engine from stock was to use Air Flow performance to help in balancing fuel flow to cylinders using 2
(2) .0225 and (2) .023 restrictors. This was done @ 2 years ago long before the change in EGT's. Also pulled fuel filters on fuel line into injection system and before electric fuel pump. Found a few small black specs in electric pump and nothing on FI filter. Talked to my field A&I who opined that all these glass panel ships show way too much info just fly the thing it's probably nothing. Dead end there. Help
(2) .0225 and (2) .023 restrictors. This was done @ 2 years ago long before the change in EGT's. Also pulled fuel filters on fuel line into injection system and before electric fuel pump. Found a few small black specs in electric pump and nothing on FI filter. Talked to my field A&I who opined that all these glass panel ships show way too much info just fly the thing it's probably nothing. Dead end there. Help