Tsio-360MB surefly fit question

[kortopates]

1 minute ago, bluehighwayflyer said:

Paul,

This being the case should I just stick with my Bendix mags in my C model?  I am coming up on my first 500 hour mag IRAN on a factory reman engine, so now would be a good time for a SureFly installation and I have been strongly considering it.  I am satisfied with Bendix mag performance, which is well established, though, and my IA and I understand their care and feeding.  She starts reliably already and I don’t expect to ever be able to operate LOP with my carbed Lycoming.  This being the case what is the point?   Is SureFly a technological advancement for it’s own sake that as a practical matter only introduces new failure modes, or am I crazy to even be thinking about not switching over now at such am opportune time?

Jim

Hi Jim,

With your C you'll be able to take advantage of ignition advance that us Turbo guys can not - the advance is disabled on Turbo installation. (it really doesn't matter because Turbo's don't generally operate at the lower MAPs that invite advancing the timing.)

So in addition to improved reliability you should get some performance improvement ROP. It may come with the con of a bit higher CHTs and this could be big concern for any C model since they are typically struggling to keep CHTs down; especially in climb. But given the advance doesn't start till about 24" (from memory), it shouldn't raise CHTs in the initial climb. (You also have the option to disable the advance if it does become a problem.) There are many C's I see with a Surefly installed doing fine with CHTs too.

But I went with mine purely for reliability. Your NA Bendix Mags though will easily go beyond the recommended 5yr/500hr IRAN servicing without a hiccup, but our pressurized mags are very subject to moisture contamination flying in wet clouds such that I'll open my mags at every annual regardless because moisture wreaks havoc on Mags. Now with the Surefly that's one less mag I have to worry about every annual.

Hope that helps with your decision.

[terbang]

7 hours ago, M20Doc said:

Is that Karl Heinz’s former Mooney?

Yes it is. But we have it for more than ten years now. 

[carusoam]

22 minutes ago, terbang said:

Yes it is. But we have it for more than ten years now. 

Proof… that time flys at Mooney speeds!

Great pirep for the SureFly install on the M20K!

Best regards,

-a-