JC2020

Hi both, I have put the engine data picture from JPI here. Also, I contacted Savvy Aviation and will wait for their input. Thanks!

Thank you so much for your two posts, jlunseth! I totally agree with you on the opinions regarding air induction design and lean technique especially on final (in fact I was practicing that). I just get a chance to download the data from the engine monitor and will wait for Savvyaviation's analysis input. Somehow I feel the airflow will cause both #1 and #2 to run richer, not just #2. How do you feel about it?

I recently realized two stand-alone issues with the TSIO-360-LB engine. Cylinder #2 has a CHT lower than others by 70F during taxi or low-power settings (<30%), spark plugs in this cylinder tend to be fouled as if this cylinder always runs richer than others. Cruising performance seems normal (CHTs same for all cylinders, EGTs same for all, and all other parameters are green). all compression numbers are normal. Could this problem result from a bad fuel distributor? When the engine is running, there's a noticeable sound in a fast rhythm like '"Dah, Dah, Dah, Dah", or a roll with paddles surrounding and hitting things. Again, performance and instruments seem normal. Don't know for sure if it's normal.

How much more critical altitude gain can be achieved if I add a Merlyn automatic wastegate to a m20k 231 that already has a turboplus intercooler installed. I see data showing intercooler alone can raise critical altitude to 21000, while automatic wastegate alone can raise it to 19000. How about a combination of the two?