can you install an injection pump turbo top to a na lower half?

[damac]

Can you do this or are there other settings that come into play internally?

I know there are different throttle shaft bushing sizes, do all the governor pieces under the top cover index at the same spot so you can swap back and forth without fitment issues?

I was just wondering if I dare do something like this with a good na bottom and a turbo top I have that is resealed.  Or if I should just get it over with now and get a fresh rebuild to start fresh on my 85 jetta td.

And just curious where you all buy td pumps online where you can send your core back for a refund after getting the unit installed.(I want to avoid downtime).  Thanks!

[Luckypabst]

Yes you can. I can't speak to any differences between the years, but you can do it assuming the governor assemblies are the same under the cover. There is a solid stop in the NA pump that needs to be tapped out of the way, otherwise the aneroid serves no purpose.

In the photo below, the solid stop is the ~6mm round plug just above the 3-sided bolt and toward the pulley end. You need to either cut (with a disassembled pump) or carefully tap this plug far enough out to allow the internal stop arm to swing past. This will be clear when you open your pump. As I recall, I was able to do this with the pump installed, using a drift and hammer. I did grind the outside of the stop pin where it was peened to the pump body and used a little bit of sleeve retainer to keep it from moving around in the future.

Chris