Gauging value of NOS ? 914-6 heater flapper valves Options

[bdstone914]

Picked up a pair of 914-6 flapper valves today that were mounting on some very good heat exchangers today. There is no rust and no sign they ever saw use on an engine.
Dansk new 914 flappers are about $140 each. They will be offered for sale along with the exchangers once I determine a fair value.
The exchangers have little metal missing around the pipes. pipes have coon deep rust pits but exhaust flanges are serviceable. Do no have pictures of them yet.

Pictures to be uploaded shortly.

[johnhora]

Since we are talking about the 914-6 flapper boxes I thought it would be a good time to share these photos of some modified flapper boxes.
I took these a few year ago on a very original 914-6 that would come into the shop for normal maintenance.
If you have a real 914-6 you know that many times the firewall shifter joint plastic cover is melted or totally removed.
Well the reason is the hole in the six flapper is turned right on the joint cover and so it gets messed up from heat.
This was a clever way to help with that problem. As you can see small metal tabs were welded on the the flapper to divert the hot air away from the plastic cover. Pretty cool solution. I don't know if this was a factory suggested fix or the guy that worked on this one before me was very creative.
I think I remember hearing/seeing that the 914-6 flapper had the hole in them to help with the cooling of the 914-6. This hole let out a lot more HE heated cooling air from the heat exchangers when the heat was not turned on. The 914-6 HEs are a lot larger that the 4 cyl HEs and the 6cyl creates more heat.