MyE28.com

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

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.

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

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.

Andrew 524td" wrote: Feb 19, 2025 5:57 AM 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.

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. 

gadget73 wrote: Feb 20, 2025 12:05 PM 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. 

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. 

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