REFLECTOR: Ignition Timing

[John Dibble]

On 5/22/2013 9:35 AM, Grover McNair wrote:
> John,
> Are you using the stock intake and carburetor?
Yes.

>   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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