|
Fred -
I'm sure lot's has been written
regarding LNC2 cooling. My stock IO-360-B1F has no problem with cooling
now. I used the Lancair baffle kit installed as instructed. I added
plenty of baffling and silicon to seal all the nooks and crannies. My
filtered air inlet is in front of Cylinder #1. I've found that if I take
off with filtered air, cylinders 1 and 3 are starved for cooling air. I
generally take off on RAM air now and temps are much lower consequently in
climb. Also, I use the GAMI principle of not leaning to 50 degrees rich of
peak (in contrast to what I was taught). I fly either at peak EGT or 150
degrees rich of peak (my engine is not smooth lean of peak to any degree).
The CHTs will climb quite a bit if you fly between these values.
Additionally, my oil cooler is mounted on the baffle in front of cyl. #2.
This way the oil cooler gets plenty of air (oil temps a non-issue) but cyl. 2
and 4 temps have never been a problem. With all this, my CHTs are
routinely at 360 F or lower, and all this is stock (except the oil cooler
placement).
I tried a few other things before
settling on the setup above. I enlarged the exit air opening and
constructed inlet ramps in the upper cowling. All had insignificant
impact.
I'd say, make sure your baffling is
well sealed, then fly it as I describe above (take off using ram air) and see if
you really have a problem.
Regards,
Ed de
Chazal
|