Engine Help

[mikey]

I have an 3w 106 and now when I roll invereted the engine gets super rich and almost wants to die it gets better as the flight goes on but still does it.

[Vic3D]

Airflow related. Are you using the intake trumpet? If you're not, try it. If you are, try without it. Mine used to do it, but after a number of flights it doesn't do it anymore. Never tried taking off the trumpet, but that could do the trick. Try that and let us know! It's a fine engine and you will enjoy it.

[mikey]

So yours just stooped doing it I guess mine started when yours quit it lol. Yes I am using the velocity stack.

[Vic3D]

Well take it off and try flying it without it. It's not really a necessity.

[Flyinrazrback]

Also lean the top end as well.

[mikey]

K thanks guys for all the help will try and let u know what happens.

[mikey]

	Quote: Originally Posted by Flyinrazrback
	Also lean the top end as well.

It is turning 6500 on a mejlik 28/10 is that about right?

[Flyinrazrback]

That sounds about right, what are your cylinder temps right after landing? The high end affects a lot of the midrange on the tilotsen carb on the 3Ws, so a lot of time when you get a big burble in the middle the high needs to go in a bit as well. Things to try are take the intake off, and run the line off the carb back into the fuse a bit, and tweak on the needles.

[mikey]

Head temps were 230 and 216 that was after hovering and alot of WOT stuff I was running it hard it has full bafling around the heads. Already ran the static port line into the fuse.

[Flyinrazrback]

Does your motor have painted heads? You might have an air leak at the carb block.

[mikey]

Yes it is the CS.

[Flyinrazrback]

Ok, with those temps you are pretty close on top, most of my painted heads run 240 or so. I would look over your case really well and see if you see any leaks, and around the carb block as well.