SDI vs. TDI Fuel Injector Pump: Differences

Hi there...

Okay, here's the translation:

"Just so you know, I'm planning to modify my fuel injection pump to use 11mm pistons."
I still have a pump from the SDI AEY.
Is it reasonable to rebuild the SDI pump and then install it?
Or, to put it another way, does it even work?
What are the differences between the pumps?

Best regards.
Sven.

Is this probably about your AFN?

I would not use the SDI pump.
It will probably work out somehow, but the pumps are only slightly different.

To my knowledge, even the 90 HP and 110 HP pumps are different, for example, in the shape of the plunger and, consequently, the injection process.

m;