525i E28 -85 changing from L-jetronic to motronic? (Allgemein)

Sorry for writing in English, I'm from Finland so I don't know much German...

My question is:

Is there anyway you could change from L-jetronic to Motronic on a E28 525i -85? Would this increase the effect of the car at all?

Can anybody give me some tips for it or pictures?

Thankfull for a answer!

Regards,

Markus