I asked this already, but only got little resonses. What is a normal engine head temp & what is a lean head temp (60 sized engines) Virtually all the advice & info on engine tuning/ leaning never break it down into actual engine temps, just the usual touch the case without getting burned advice.

right now im running temps of 180deg.Far reached 196deg already (engine in a OS 61LX-H in Raptor 60)

So if someone monitors their heli's average head temp with a IR etc.. temp gun.. tell me what engine temp keeps you cool! lol & what temp to expect when running in normal mode & idle2

I have always tuned my car by temp but it is a bit of a PITA to get a "good" head reading on a heli. Putting you fingers on the backplate is the popular "tried and true" method. (Pretty hot but it not fry your fingers).

You should be able to hold them on there for a few seconds without having to move from pain. If I remember you do not want the motor over 240F at the head.

IR temp guns are nice and all that but here's what it comes down to, you need to be concerned with the max head temp and thats going to occur when the engine is loaded doing tic tocs or whatever. A venom temp gauge is nice because you can recall the high and low temp from a given flight. You should be looking for a max temp 220 or below, I run mine not to to over 200, just isn't worth it for me for the extra wear on the engine. Even if the temp is 200 or 205 max, by the time I land and look at it the gauge is reading in the 180's, which if you measured after the flight would lead you to think you had some room to go leaner when infact under load you were already *****g out or nearly so.

The engine temp or performance depend too much on setup. The best way I have found it doing it with a tach or headspeed. When you tune the needle and get a max rpm you know you are running stoich. If you are running hot then you got too much pitch and changing the needles will not make it better at that point.