GAMI jectors are NOT required for safe operation LoP.
You should run the GAMI-style check, measuring CHTs at a range of fuel flows, to ensure you do not have an odd one. In the old non-instrumented engines problems did occur but today it is easy to check performance on a real-time basis. I ran the GAMI test on my IO360 from Aerosport Power and on my TSIO550 from Performance (yes, that Performance) and found each was fine with the builder’s choice of injectors. After 600 hrs on the IO360 and now about 300 hrs on the TSIO550 the engines are clean and running fine. SOP is full rich to cruise altitude, MP and RPM back to cruise setting, “big pull” well lean and enrich flow (17.5gph) to target TIT (1550-1600F in my case).
Robert M. Simon
ES-P N301ES
From: Doug [mailto:lancair1@bellsouth.net]
Sent: Monday, November 05, 2012 11:38 AM
To: lml@lancaironline.net
Subject: RE: [LML] Why is my fuel burn so high in my IV ????
I believe it is because we are operating on the lean side of peak. My settings for LOP 65% are 27.8”MP/2500RPM/15.9GPH. Don’t attempt without GAMI jectors or the like…
Doug
N654DM 1350TT
Douglas W. Johnson, MD PA
Reading some of the posts on the LML about IV/IVP drivers. Just wondering how they are getting around 18-19 GPH at cruze power?
I have a straight IV with a TSIO-550-B. I usually fly around 10K feet, using 28in MAP, 2400 RPM, Leaning to 1550 TIT, and getting 21.5 GPH fuel burn.
What am I doing wrong? How is everyone else getting there fuel flow so much lower?
Any advice would be much appreciated.
Thanks,
Guy Foreman