Does the E1 Prima have pre-infusion?
Yes, the E1 Prima has the built-in SIS (Soft Infusion System) as all other models for Nuova Simonelli and Victoria Arduino. Additionally, you can control many other parameters (such as pre-wetting of the coffee) via the app. Here a snippet of what the software programming capabilities are https://victoriaarduino.com/
What is Victoria Arduino's SIS (Soft Infusion System)?
SIS guarantees soft and creamy espresso extractions every time. It does this by monitoring pressure in the system and gradually increases this pressure as the extraction process continues. A process which is extremely important when you are looking for the best possible cup.
What is Pre-Infusion?
Pre-infusion refers to the process of gently soaking the puck of ground coffee in your portafilter before applying the full desired brewing pressure. The goal is to ensure that water evenly penetrates the grounds to ensure that the entire bed has the same amount of water flowing through it once extraction begins.