RyanJE wrote:Have you tried a "non precision" basket and no pre infuse on the BDB or DE1? ... I have a BDB and feel like even with pre infuse at 0 it still has some pre-infusion since the lag of ramp in a vibe pump.
Because of different grouphead size (53mm S1 vs 58mm DE1), I cannot use the same baskets. The Spaziale double baskets are not precision baskets; in fact, they have the highest variance in hole size of all baskets I've tested. I did try a nonprecision Gaggia double basket on the DE1.
You're correct, rotary pumps have a higher water debit (flow rate) than vibe pumps, and saturate the puck faster. Dan noted this many years ago:E61 with expansion chamber, Elektra A3 rotary, E61 with solenoid (reproduced from original post
The maximum flow rate on the DE1 is 8ml/s, significantly less than ~12ml/s on the S1. The DE1 also has greater headspace. So there are lots of factors that could play a role in extraction differences.