EX-Series Multi-Function Displays - Surefly electronic ignition

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Surefly electronic ignition

Printed From: Avidyne
Category: Avidyne General
Forum Name: EX-Series Multi-Function Displays
Forum Description: Topics related to the Avidyne EX500, EX600, and EX5000 Multi-Function Displays (MFDs)
URL: https://avidynelive.com/forum_posts.asp?TID=2499
Printed Date: 26 Mar 2026 at 11:43am
Software Version: Web Wiz Forums 12.07 - https://www.webwizforums.com

Topic: Surefly electronic ignition

Posted By: Dallas90
Subject: Surefly electronic ignition
Date Posted: 19 Apr 2023 at 5:23am

Has anyone here replaced a Mag with a Surefly? I'm coming up on mag rebuild and considering it for my Cirrus SR-20. Does it cause any interface problems with your MFD? I would have the option of replacing the left or right mag, replacing left being recommended by Surefly.

Replies:

Posted By: LarryPetro
Date Posted: 29 Apr 2023 at 11:35am

Two years ago I replaced the left mag with a Surefly electronic mag. No problems with the MFD (or, anything else) were caused. I have dual IFD440 and Entegra MFD and PFD.

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Larry Petro - Columbia 350 @ KFME

Posted By: Dallas90
Date Posted: 30 Apr 2023 at 11:07am

Did it require the tach2 signal converter? Also, did you have any improved performance or decreased fuel burn of any note?

Posted By: LarryPetro
Date Posted: 30 Apr 2023 at 12:23pm

My Surefly did not require the tach2 signal converter, but I did need a Slick ignition harness.

My sense is that starts are easier (i.e., quicker and without drama) and that fuel flow has been reduced 0.5 - 1 gph at 65% max rated horsepower. I do not have data to support that impression, unfortunately.

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Larry Petro - Columbia 350 @ KFME

Posted By: Dallas90
Date Posted: 01 May 2023 at 11:10am

Thanks for the info. I keep getting mixed messages on the need for the Tach2 signal box. Surefly thinks I need it and Avidyne has yet to respond.

Posted By: dmtidler
Date Posted: 01 May 2023 at 11:23am

I had to install the Tach2 signal box in my airplane so that the SureFly ignition would properly display on my Horizon Instruments P-1000 digital tachometer.

Posted By: Dallas90
Date Posted: 02 May 2023 at 12:49pm

I have the Avidyne Entegra PFD and MFD so that’s the equipment I want to keep happy. I don’t want to buy an extra signal conditioner I don’t need. Should happen within the next 3 months.

Posted By: LarryPetro
Date Posted: 02 May 2023 at 12:51pm

I also have the Avidyne EXP5000 PFD and EX5000 MFD.

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Larry Petro - Columbia 350 @ KFME