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Old Oct 30, 2012, 09:06 AM
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United States, NY, St Lawrence
Joined Feb 2012
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Originally Posted by Brutus1967 View Post
Now I am trying to "unleash all that power" by keeping the engine cooler, as there is definitely a fair amount of power extra at lower engine temperatures. That was never there in such amounts: when the engine was still glow, the difference between hot and cold was a lot less and the mixture range over which the engine ran good was a lot smaller.

But it is just.... I have had the fortune to see Bell 47 G's with the open pipes on that 6 cylinder Lycoming, and the sound of the OS , the flight performance of the helicopter is so very realistic, I can't just decommision it....

Bgds, Bert
If you want to unleash the power & reduce operating temperture, set the timing to @ least 34* BTDC, 36* might be even better.

My FA91S made about the same power on CDI compared to GI when timing was 28* BTDC. It responde very well & increased RPM up to 35* BTDC & remained the same @ 37* BTDC so I backed of to 35*.
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