REFLECTOR: Ignition Timing

[Grover McNair]

John,
Are you using the stock intake and carburetor? I am sorting out a
continental injection system on my Franklin. I ducted the crankcase vent
back to the trailing edge of the cowl. I get some oil on the prop but it
wipes off easily.
Grover McNair

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of John Dibble
Sent: Tuesday, May 21, 2013 8:33 
To: Velocity Aircraft Owners and Builders list
Subject: REFLECTOR: Ignition Timing

Well, I think I'm on to something here.  A while back  I mentioned that 
I was experimenting with reducing the timing on my Franklin engine.  I 
now have it set at 24 degrees BTDC, which is 4 degrees less than 
standard.  Yesterday I flew from MS to NY at 11.5 k feet.  The engine 
ran very smooth, much smoother than in the past several years.  My #3 
cylinder which had been running 30 F higher than the others is now in 
line with the rest.  Best of all, I gained 6 kn in airspeed.  One thing 
I was hoping for that didn't happen is elimination of the oil streak on 
the cowl from the breather tube.  I plan to reduce the timing further 
and see if the oil streak goes away.

John
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