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Another Panel Upgrade Thread - Add WAAS

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Active Member
Apr 13, 2010
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So, I'm starting to really feel like I want a WAAS capable GPS in my airplane. When I completed my instrument rating a couple of years ago I felt that my personal minimums were higher than any non-precision approach so I felt good about my current equipment. However, I really like the idea of having vertical guidance and more approach options. So, I have a couple of ideas that I wanted to get some opinions on. Attached you will see a picture of the panel in my 1979 Piper Archer. Here is what I'm considering:

Option 1 - Simply upgrade the Garmin 430 to a 430W and keep everything else the same. I know I will also need a new CDI as my current CDI doesn't have the GPS indicators. The Collins radio still works great but my #2 CDI doesn't have a glideslope.

Option 2 - Remove the Collins NAV/Comm that is my NAV2 and move the Garmin 430 down. Add a new Garmin GTN650 or 430W. Any suggestions on which route to take or if there is something else I should be considering?

Additional - I currently have the Piper Autocontrol IIIB that works quite well and is coupled to both NAV/Comms via a switch. I would like to add altitude hold and have roll steering ability so I can fly fully coupled approaches. What are my options and estimated prices to do this economically?

I know there are a lot of other upgrade options such as an Aspen but honestly I'm not really interested in replacing my steam gauges. Any direction on my upgrade options and recommendations would be greatly appreciated. Also, if you have some guidance on directionally how much each of these options would cost me I'd appreciate it.


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