Bought wrong pump

[Dejotaa]

Hello!

I have an E34 525tds. I bought a E28 524d (0460406047) pump for doing a fully mechanical pump conversion.

The issue is I wanted to buy a 524td (0460406022) pump.

The non turbo pump can be used on a turbo engine? It has to be adapted in some way?

Thanks in advance

[gadget73]

Hm, not sure what the differences are, but a quick look of that part number shows me something with what looks like a boost compensator. I have no idea why a non-turbo pump would need that or how it works, but I suspect the differences are going to be in that area.

[Kerrvillian]

Sell it and get the right pump. Your timing advance and boost compensation fueling are completely different between N/A and turbo applications.

[Andrew 524td]

Hello. I discussed this issue in GREAT detail last fall. But I'm not sure that I can translate my solution to the same problem in an accessible and understandable way. Therefore, I suggest you read my report here.: 
https://www.drive2.ru/l/691616454444855026/
There are a lot of photos, I showed all the differences.

[herbumpkin]

Hello. I discussed this issue in GREAT detail last fall. But I'm not sure that I can translate my solution to the same problem in an accessible and understandable way. Therefore, I suggest you read my report here.: 
https://www.drive2.ru/l/691616454444855026/
There are a lot of photos, I showed all the differences.

sorry but i cant see your file

[gadget73]

Probably something getting lost in the Google translation, but what is the "Cassette" with the different springs for?  Is that for timing advance? 

I think I understood enough of the rest of it. 

Not surprised its largely the same pump with some differences.  It would make sense for Bosch to design it to be semi-universal, just some specific parts change depending on application. 

[Andrew 524td]

Probably something getting lost in the Google translation, but what is the "Cassette" with the different springs for?  Is that for timing advance? 

I think I understood enough of the rest of it. 

Not surprised its largely the same pump with some differences.  It would make sense for Bosch to design it to be semi-universal, just some specific parts change depending on application. 

This cassette has different springs for a sharper release of gas in the case of a turbocharged engine. This cassette is a kind of "amortizer" between the throttle lever and the fuel supply lever.

[gadget73]

Ah ok, it changes how the governor reacts to the throttle lever.  That makes sense. 

Is there a difference in the timing advance spring? That should live under a cover on the side of the pump facing away from the engine.  Its a small cover with 2 screws, and there is a spring and a piston in there.  The piston gets internal pump pressure which changes with engine RPM.  The spring will change how much the timing advances with engine RPM, and I think there might be spacers or something else in there to limit how much the timing can advance. 

[Andrew 524td]

No, the advance system and the spring in it are exactly the same.