...and a possible solution...
On the RV-7s with IO-360-A1B6 (200HP/Angle Valve) that I've built and operated, I've always seen a residual blue stain around the injector in the #2 cylinder (Pilot side, front).
The fuel injectors are "clocked" correctly (per Lycoming SI 1275C), so there is a bit of a mystery as to what's going on. I recall seeing a discussion on VAF about the incoming airflow messing up the injector breather dynamics - but couldn't find it.
During the course of building an RV-14, I noticed that Van's has changed the the layout/shape of the #2 air dam/temperature riser. So I figured what the heck -- couldn't hurt. (picture attached)
Question for the hive mind - has anyone else seen this issue? Has anyone changed the shape of the riser to deflect air around/over the injector body? Scott McD -- was this reason for change in the RV-14?
Cheers!
On the RV-7s with IO-360-A1B6 (200HP/Angle Valve) that I've built and operated, I've always seen a residual blue stain around the injector in the #2 cylinder (Pilot side, front).
The fuel injectors are "clocked" correctly (per Lycoming SI 1275C), so there is a bit of a mystery as to what's going on. I recall seeing a discussion on VAF about the incoming airflow messing up the injector breather dynamics - but couldn't find it.
During the course of building an RV-14, I noticed that Van's has changed the the layout/shape of the #2 air dam/temperature riser. So I figured what the heck -- couldn't hurt. (picture attached)
Question for the hive mind - has anyone else seen this issue? Has anyone changed the shape of the riser to deflect air around/over the injector body? Scott McD -- was this reason for change in the RV-14?
Cheers!