This quote is from some other forum and I don't want to cross-post. At first I react defensively as a proud Vivaldi owner. But then I remember all the "I didn't notice any difference but still keeping it" phrases here in S1 Cafe. From the experienced users to newbies we all hear this. So do the pre-infusions in Vivaldi (both programmable and progressive) are real pre-infusions? If we don't taste any difference then maybe there is no difference? What do you think?If you want real pre-infusion, then it's better to mod your machine, so there is a delay before the pump kicks in. Allot of people have done this on rotary pump machines without any pre-infusion capabilities.
the chamber doesn't do anything close to real pre-infusion.
Regards,