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  #61  
Old 01-04-2018, 03:00 PM
Doug Eves Doug Eves is offline
 
Join Date: Dec 2007
Location: Brigden Ontario Canada
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Also , have a look inside a high time lycoming that has used av oil for it's life. Looks like coke factory. High time lycomings look like they just went together 5 minutes earlier when using XD3 15w40 and mic out with next to no wear.
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  #62  
Old 01-04-2018, 03:03 PM
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grubbat grubbat is offline
 
Join Date: May 2012
Location: Ga
Posts: 662
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I was running 1 tooth ATDC till i got a kickback that broke my new high torque starter then I went to 2 tooths (teeth) ATDC and no more kickbacks. However, Im guessing I'm leaving some HP on the table by doing this.

Quote:
Originally Posted by GalinHdz View Post
Interesting that several years ago, and after many months of experimenting (Parallel valve Lycoming with 8.5 compression, dual P-Mag installation "A" curve) I found it worked best if I set the timing just past 1/2 tooth ATDC. I never understood why but now at least I have a plausible explanation.

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