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Old 10-13-2016, 07:40 PM
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Join Date: Sep 2005
Location: Central Coast NSW, AUSTRALIA
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MVVS diesel's are notorious for having black exhaust residue. On the other had when I first run an engine that's been in storage with ATF as an afterrun oil, it usually has black exhaust for a little while.

Reading your posts it seems to me that you're sending your diesels off to fly with too much compression. I'm guessing that you're flying them in control line models? If so it's ok to release them with a slight under compressed miss. It'll warm up in a few laps. Both compression and needle setting can change as a cold engine warms. You usually tune a c/l diesel over a number of flights.

Otherwise it could be your tank pickup position, fuel too old, DII percentage, kero quality, venturi hole too big, etc etc.

Any pictures of your setup?

Last edited by qazimoto; 10-15-2016 at 04:31 AM.