Everyday practicalities...
What I want to know is... I have a O320-E2D running on PULP98 (with appropriate STC);
1. The STC (petersen) states to run a tank of AVGAS every 70-75 hours. I think it says because of the valves. Now this has been proved wrong, should I still do this to observe the requirements of the STC or not bother any more?
2. I only have a single CHT & EGT, I can lean it out to I get an RPM drop, which corresponds to roughly peak EGT. I run the engine around 70-75% power (2500 RPM @ 2500', 2600 RPM @ 5000', 2650 @ 9000') this is as per the Cessna manual. Now the manual was written for 80/87 AVGAS, can I assume PULP98 is close enough as to not make any difference, or should I do something different?
3. Re spark plugs, I am using REM38E, should I change to a different plug or not?
P. S. The engine appears to be running fine, CHT's around 350F in cruise, 400F in long climb (full rich), 30 litres an hour.