Hello Guido, No harshness in cup, temperature can play a big part, as well as the cleanliness of the machine as was mentioned. Water hardness, so many things. I would start with distilled water for sure. Not because it is the best, just because you are starting from zero with no minerals. Everyone will give you different answers and to be honest most of them will be right to a point. Your problem could be an addition of problems.
I am only using the VST basket ( http://store.vstapps.com/products/vst-precision-filter-baskets ) with 18 grams of coffee (it is designed for that. In that basket it is not updosing). I also go for the fruitier coffee's from the west coast I enjoy for example http://www.49thparallelroasters.com/products/epic-espresso. Could it just be your dislike for a type of espresso? Maybe you could pick up some info here? http://www.home-barista.com/howtos.html?sid=f7ef7ce88c478255a2509aed9f014000 As for the pressure that is simple to adjust. http://s298.photobucket.com/albums/mm259/judge34411/?action=view¤t=Noconnector.jpg Take off the back of the machine. Looking at it from the back, you will see a black plastic unit on the upper right side. This is the pressure-stat. You will notice it has a copper pipe coming out of the bottom going to the top of the boiler and wires connected to the top. In the middle their is a cog (wheel) you can adjust this clockwise (looking down). This will increase the pressure, Adjust it very little at a time and allow the pressure to adjust. Mine came set at . 95 bar I now have it set to about 1.1 bar. I imagine I would not try and take it over 1.2 even though others take it higher. I was told some stores will preset them to 1.2 others will leave them stock at . 95, same for the brew pressure, some stores will lower it down to 9-10 bars and some will leave it stock, as mine was (13 bar, now at 10). Good luck John On Mar 27, 5:56 pm, guido <[email protected]> wrote: > hello judge, > > this is very interesting indeed. so it looks like this very long > pre-infusion is part of the brewtus iv vibrational pump design, unlike > any other brewtus. > > i feel relieved that this is normal. > > i wonder why they did it, only for the iv vibrational? > > also thank you for your additional data. do you think the machine > performs better with larger dosage, or do you just like to updose? > > i did read earlier that you are enthusiast about this machine. you don't > experience harshness in your cup? > > and by the way, now that this is cleared up, i have one other question > about this machine. the steam boiler of mine never goes above 1.0 bar, > it actually stops around 0.95. does your machine cut off at the same > point, or does it go to 1.2 like all the other brewtus machines? > > thank you very much, > guido. > > > > > > > > > Ok my results. An this is with the rubber plug that came with the > > machine not a blind filter. Unit is set to 10 bar. Done both empty and > > full of water. Sorry no blind filter, So I hope this helps. > > > Single basket 12.6 sec .(empty) 11.6 sec. (full) > > Double basket 14.3 sec. (empty) 11.6 sec. (full) > > VST 18g basket 14.5 sec. (empty) 12.0 sec. (full) > > Triple basket 17.7 sec. (empty) 12.3 sec. (full) Note: could > > never get triple basket to not leak a little with rubber plug so doubt > > that is any use for times. > > > When I make espresso, I always use the VST basket with 18 grams of > > coffee, I grind very fine, with a very light tamp. Around 10 lbs. I > > use a naked portafilter and I see the beads of coffee start around > > 8-11 secs. I get my 2 oz. at around 8.5 bar in about 28-30 secs. > > > An on a final note over pre infusion, take a look at this video. > > >http://www.youtube.com/watch?v=K93RLmGkps4 > > > Good luck > > > John > > > On Mar 24, 2:18 am, guido<[email protected]> wrote: > >> hello, > > >> i noticed something in another thread, while trying to find out what is > >> wrong with my brewtus (or me, operating it) and i noticed something > >> peculiar. > > >> my brewtus iv vibrational pump machine is very slow in building up > >> pressure. > > >> i watched a number of youtube videos of people making espresso with the > >> brewtus, and the coffee always starts dripping within 4-8 seconds. > > >> i measured my machine, with a blind filter. it takes 11 second for the > >> pump to reach full pressure (about 9.5 bar with the blind portafilter). > >> that's about the same time when the espresso starts flowing with coffee > >> in the filter. > > >> what i would like is for other people, with the same machine (brewtus iv > >> vibrational pump) to repeat this test with the blind filter for me and > >> give me the resulting time. this could help me a lot. > > >> i could be on the wrong trail, or i could be dealing with a faulty pump. > >> the answer is hopefully in your replies. > > >> another thing i would like to know, is there any way on this machine to > >> shorten pre-infusion time? i've learned a bit about pre-infusion from my > >> la pavoni manual lever, and 8-11 seconds seems very long time. with my > >> lever machine, about 5-8 seconds would be right. most other machines > >> seem to take this same amount of time for the first drops to appear. > > >> this could be the answer to a problem i have been struggling with for > >> months. or not. it depends on your answers. > > >> so, please, be so kind and test it for me. i would appreciate it very, > >> very much! > > >> thanks and have a great weekend everybody, > >> guido. -- You received this message because you are subscribed to the Google Groups "Brewtus" group. 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