OS 50 Hyper Help?????
 

I have a raptor 50 titan with OS 50 Hyper in it. I bought the heli used and it already had this motor in it, ran great for about 10 flights then chip came out of piston and ring blew out glow plug and luckily I had time to auto and save my rappie. The new head, crank, piston and ring were so expensive I just bought a new motor. Destined to get this motor running right I checked out what everyone is saying on the forums on tuning and break-in. Today I was outside wringing her out and this is again about the 10th flight since I had replaced the motor and the motor just shut off, not enough room to auto and got a little damage($50.00) Can someone please tell me what I am doing wrong with this motor It is driving me crazy!!
Motor Settings are as follows:
1. low end needle in the middle
2. high end needle at 1 1/2 turns out
3. 30% nitro morgan heli fuel
4. enya plug #3 i think (used to use OS#8 but someone told me this is a more reliable plug)
5. just replaced all the fuel line in the whole heli!
6. tempurature 160 degrees after 1940 head RPM run with 8.73:1 ratio @ 16930 Engine RPM about 5-10 minutes
I live in florida with altitude of 25' above sea level just in case someone wants to give needle setting suggestions.

RE: OS 50 Hyper Help?????
 

We don't have needle settings to give you or a temp. That's because anything we tell you cannot be correct for those items. What needle settings you find when you tune the engine, and what temperatures the engine runs at are the "correct" ones. You have to set the engine based upon how it sounds and handles. The number of turns on the needles or the temps can only be very rough guides to let you know if you are anywhere close. Your engine will tune where it needs to go, and not where someone tells you. We only count needle turns when setting the very rough "ballpark" settings. We then richen or lean the engine based upon where it needs to go. As long as the engine's running well, we never worry about how many turns. They are what they are.

Same with temperature. As long as the engine's running well, we ignore the temps, and never use them to tune an engine.

If an engine just stops running in mid-flight, and there's no fuel system problem, then the greatest likelihood is a too-lean setting. That's a very common reason engines quit...especially if they are set by temp or number of turns of the needle. You have to set an engine by performance...either by sound and handling, or by using a tach on the engine to locate the peak RPM and then tune to be rich of that setting. That's also the most likely reason why the engine quit and shed parts of the piston the first time.

Finally, ignore the amount of smoke you're getting. Different fuels will emit different amounts of smoke when the engine's running. We know one fuel that is rather smoky, even when the engine's running too lean. You can only rely on smoke as a rough indicator once you know how the engine tends to run, and when you have it properly-set in the first place.