tcone1
Well Known Member
I'm perplexed.
I had to take the carb down to the folks at Lycon. It was way too lean in stock trim as a 10-3878. Lycon fixed the lean-ness at high power settings, but I still have problems with high EGT's at anything less than 20 inches.
My engine starts fine, idles smooth, and makes good power at high power settings now that it's been richened up by Lycon. At low power settings, the EGT goes through the roof, and the engine starts sputtering as though it wants to quit. I can't get any rpm rise at idle cutoff, and have tried enrichening the idle needle to no avail. I have checked for induction leaks...can't seem to find any bubbles when pressuring the induction system and squirting with soapy water. The primer solenoid isn't leaking. The fuel system will support 45+ gal/hour on the aux pump. The fuel screens are spotless and the bowl has no debris in it. The timing is spot on. All parts are new from Superior.
I have a Superior XP360, MA4-5 (pn 10-3878 flowed and modded by Lycon), Van's FAB, Slick mags, Whirlwind RV200 prop. I've only got single channel EGT and CHT.
Help, what else can I check? I don't like seeing 1500 degrees on the egt on short final, or while taxing.
I had to take the carb down to the folks at Lycon. It was way too lean in stock trim as a 10-3878. Lycon fixed the lean-ness at high power settings, but I still have problems with high EGT's at anything less than 20 inches.
My engine starts fine, idles smooth, and makes good power at high power settings now that it's been richened up by Lycon. At low power settings, the EGT goes through the roof, and the engine starts sputtering as though it wants to quit. I can't get any rpm rise at idle cutoff, and have tried enrichening the idle needle to no avail. I have checked for induction leaks...can't seem to find any bubbles when pressuring the induction system and squirting with soapy water. The primer solenoid isn't leaking. The fuel system will support 45+ gal/hour on the aux pump. The fuel screens are spotless and the bowl has no debris in it. The timing is spot on. All parts are new from Superior.
I have a Superior XP360, MA4-5 (pn 10-3878 flowed and modded by Lycon), Van's FAB, Slick mags, Whirlwind RV200 prop. I've only got single channel EGT and CHT.
Help, what else can I check? I don't like seeing 1500 degrees on the egt on short final, or while taxing.