Problem getting RPM signal from Surefly SIM

[MisfitSELF]

I have a M20J with a B&D Tach (one that uses electrical pulses from the Mags to get RPM).  My installer for the Surefly is having trouble getting the RPM to work in my engine monitor (an Insight G4) or my stock B&D Tach.  I purchased the Tach 2 board and he still can't get it to work with either signal outputs.  He's stumped, it seems Surefly guys are stumped as well.

Anybody have there own experience with this?  Tricks or gothas?  Unforetunally the aircraft is a couple hundred miles away from me getting the upgrade so I don't have much more than phone calls, texts and emails to help work this out.

 

Bruce J. Wilder

[Igor_U]

I wouldn't know about Insight G4 but I have installed Surefly and already had EI CGR30 engine monitor. CGR RPM signal would come from Magneto P-leads but for Surefly, it  needed inline resistor. I am not sure about the value but it was available online, from EI or Surefly...  

I didn't need Tach 2 board and was not aware of it at all.

Good luck

[carusoam]

+1 for the right resistor…

Noted around here somewhere…

Good luck with the hunt…

Fuuuuuzzzzzy memory only, not a mechanic…

Best regards,

-a-

[MisfitSELF]

Pirep:  my installer (Top Gun in Stockton) tried all kinds of resistor combinations and still could not get the Surefly to provide RPM data to the legacy Tach.  This was with and without the Tach 2 module in the loop.  After much heartache in trying to get this to work and working with the folks at Surefly, I ultimately elected to purchase an EI Tach that replaced my legacy  B&D Tach.  I now have both left (Surefly SIM) and right (Slick Mag) hooked up and reading on the EI Tach without the use of the Tach 2 module and it seems to be working (although, I can't stand the look of the EI Tach -- personal preference, it doesn't however fit well where the original Tach used to be and I can learn to like it I suppose).

Some other fall-out to this install:  The insight G4 RPM was also not working with Surefly so that has been switch to the right mag.  And the Hobbs meter (which I really used as a "Tach") is now hooked up to the EI Tach and it's placarded as IN-OP.  I may consider removing the Hobbs meter all together at some point (if I have no Hobbs meter does all my flying become 'free'?).

[PT20J]

I believe that the B&D hour meter only works with a B&D tach. You need some sort of recording hour meter for maintenance records. Since FAR Part 1 defines time in service as being from takeoff to landing, the best way to connect a "hobbs" meter used for maintenance is to use the second set of contacts on the airspeed safety switch, or some instrument that uses GPS speed for recording flight time.

Skip

[kortopates]

Now that you have the EI R1 tach installed you have a complete solution. The hour or tach time on the R1 doesn’t start to accumulate till 1300 rpm which results in accumulating tach time on a par with the old Mooney hour meter; i.e., except for the run up mostly only counts flying time.


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