I try to run as rich as possible as long as I have the power I need. The up side is your engine will last longer. The down side is less than maximum power, the need to replace glow plug more often, and excess un-burned oil on your R/C.
Mine points to the bottom? Is there a better way?
And I too have been trying to run more rich then lean, because
I think my OS has been running VERY hot lately. (that or my
Radioshack temp gun is wrong) But in 60 degree weather, I
get temps in the high 200's! =(
Wow, 200 is cold for a whippin OS. I've had to tune one OS mill at 330 degrees F.. But let me tell you, IT FLIES! I have written OS on numerous ocassions and they always insist on the same thing, "Tune your engine until it has no more gain in performance. Whatever temp provides the best performance is what you want to run.". That is their standard answer. And with the warranty on most, you can replace it up to 2 years. Keep in mind, they condoned running at 360 deg. F. on an OS CVX Hyper .15.
Because your exhaust is pointed down, your spent fuel naturally has a place to escape. If what pours out seem excessive AND your temps are as low as 200, well, i would have to go with leaning it out.
I sometimes do this by
set HSN to 'stock after break-in' needle setting (typically a quarter turn in from break-in setting)
set LSN to factory break in setting
fire it up and set the idle to accomodate needle settings
run a half tank
This will be your baseline - write it down and keep it near your fuel bottle at all times (i put mine in a ziploc bag)
Start leaning and keep leaning until you see that there is no more performance gain. Watch your temps the whole process. If your hitting 350 - you may want to go back a little and run there)
Smoke is always a good indicator, but, a honeybrown piston and sleeve along with good compression is the true indication of an engines wear and tear. I just now started recording compression settings on a mill at the time of purchase.
Still trying to establish the best oiling process for all mills. That will just take some time to do right.
I am running a OS-CVR so I'm pretty sure there's no warrenty.
(I bought it used off ebay anyway). And I have hit temps above
300, but always been worried that it was too high.. so I back off.
But sounds like some good advice.. and I'll start doing that.