SDI injection pump differences compared to TDI pump

Hi...

Here's the background: I plan to upgrade my fuel pump to a 11mm piston. I still have an SDI AEY fuel pump. Is it worth converting the SDI pump and then installing it? Or, more accurately, is it even possible? What are the differences between the pumps?

Best regards,
Sven

Is it about your AFN?

I wouldn't use the SDI pump.
It will definitely work somehow, but the pumps are slightly different.

The 90PS and 110PS pumps are, as far as I know, different, for example in terms of the shape of the plunger and therefore the injection pattern.