Hi Troy,

The 63's are running very well in the P-61 and it looks as though I can count on a 10 minute flight on 11 oz tanks as long as I don't rip around at full power all the time. This is allowing me to land with about 1/3 a tank left on each side. I now have about 18 flights on these engines. I have been using Wildcat 20/20 fuel and OS F plugs. The last 3 flights I used the Wildcat 30% Curtis Youngblood Heli blend and it seemed to run just as well. I have not had to fiddle with the mixtures at all since the test flights.

Now the only oddity I have noticed is with the right engine.
This is the second engine that I start each time I fly the plane, due to safety concerns.
I have noticed that once I have started both engines and allow them to warm up for about a minute, as I do the first run-up to full power ,with gradual throttle movement, the right engine seems to bog and stop increasing RPM at which point I reduce power.
This only happens the first time. If I come back to high idle and then power up again it does fine and syncs in with the left engine OK.
You can hear the bog in this video at about the 30 second mark as I do my preflight run-up.
http://www.rcuvideos.com/item/YQZMCV2QLV180DM2
Could this be to the fact that the right engine has not had as much time to pressurize the tank as the left? Since I always start the left one first. There is only about a 10 second delay between starting the two engines.

This is a consistent situation that has caused me to check for it each time I start up.
Prior to my last flight I backed the regulator out about 1/8 turn to see if this would help a bit. It didn't seem to make any difference

In all other aspects the engines run perfect! They are both pulling a nice stream of exhaust smoke behind the plane and the only time they have died has been when I run the plane out of fuel. Which I am really trying to avoid doing.

Thanks