mikeytingstrom
Member
RViators,
I have an RV4 with a 200hp IO-360-A1B6 with a WW 200RV constant speed prop.
Two problems I'm experiencing and looking for troubleshooting advice:
Fuel flow problem: At full RPM, fuel flow can fluctuate anywhere between 12 and 18GPH. Fuel flow stables out when boost pump is turned on. I've read that this could be trash clogging the injectors, air leaking into the lines, failing mechanical fuel pump, fuel servo problem, or fuel lines being close to the engine and heat vaporizing the fuel causing erroneous indications.
Here's a video 20"/2400RPM, boost pump on vs off:
YouTube video of fuel flow fluctuations
TAS Problem:
At full power I'm only seeing at most 170KTAS, which for 200hp doesn't seem right. Another VAF member recommended checking that the tach is indicating prop RPM correctly, which is something I still need to do. I'm also showing ~18GPH at full power. Looking at the Beechcraft Sierra POH that this engine came out of, that seems very high for full power.
Looking for any and all advice!
Mikey
I have an RV4 with a 200hp IO-360-A1B6 with a WW 200RV constant speed prop.
Two problems I'm experiencing and looking for troubleshooting advice:
Fuel flow problem: At full RPM, fuel flow can fluctuate anywhere between 12 and 18GPH. Fuel flow stables out when boost pump is turned on. I've read that this could be trash clogging the injectors, air leaking into the lines, failing mechanical fuel pump, fuel servo problem, or fuel lines being close to the engine and heat vaporizing the fuel causing erroneous indications.
Here's a video 20"/2400RPM, boost pump on vs off:
YouTube video of fuel flow fluctuations
TAS Problem:
At full power I'm only seeing at most 170KTAS, which for 200hp doesn't seem right. Another VAF member recommended checking that the tach is indicating prop RPM correctly, which is something I still need to do. I'm also showing ~18GPH at full power. Looking at the Beechcraft Sierra POH that this engine came out of, that seems very high for full power.
Looking for any and all advice!
Mikey