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Gami Spread Test?

201er

By 201er
in General Mooney Talk

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201er Grand Master

201er

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How do you perform a gami spread test? I never did it cause a friend helped me with that when I was getting into LOP ops and haven't done it since. With new engine coming up, I'll want to know how to do this in real time on an EDM830 and in post-analysis. What exactly am I looking for and what do I do about it?

jetdriven Grand Master

jetdriven

Posted
Posted

I found it easier with the new engine to go to almost rough, then do the GAMI test from lean to rich. It got to 380 CHT at .4 GPH ROP.

FWIW the new engine had a .8 GPH spread, after removing, cleaning, and reinstalling injectors (swap 2 for 3) it is .2 GPH.

201er Grand Master

201er

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Long story short, same exact thing as Byron (including approximate engine hours, years, and problem) one month behind him. It's raining Lycomings and conversions...

201er Grand Master

201er

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4450TT, 1400 SMOH in 1998. Flew <100 hours per year last 2 years prior to my purchase. Flew 200 hours in first year no problem. Then ferrous metal in oil after annual.

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