Thanks John, I think I understand your issue better. I will be interested
to see what your data suggest.
Since we drink caps 90+ percent of the time, the advantages of the twin
boilers (eliminating the uncertainties of surfing and non-standard
portafilters) have always trumped other considerations and I am content with
the speed of the Gold Pro.
I have had each of the units as they came out and had one of the ten GS3
prototypes briefly. While I do like the extra oomph of larger heaters, it
just wasn't a very big deal for me.
Have fun.
----- Original Message -----
From: "John Brinkman" <[email protected]>
To: <[email protected]>
Sent: Saturday, March 05, 2011 9:35 AM
Subject: Re: Steam Pressure
Hi Kitt
I think that it is a pretty well know fact that the Brewtus is down on
steaming power when compared to other similar machines on the standard
water heating test. According to the reviews on Home Barista of the
Brewtus, it is around 33% slower than other machines in the same sort
of price range, namely La Spaziale VII 1.2mm Tip, Vibiemme Domobar
Super, Quickmill Andreja Premium or Giotto Premium who all seem to
take around 28 seconds to raise a 8oz of water from 40 to 160 degrees
Fahrenheit vs the Brewtus which takes 38 seconds with the two hole tip
and 60 seconds with the single hole tip. Home Barista even mention in
the conclusion of their review of the Brewtus "However, both the
single and two-hole tips fell short of the steaming power one would
expect from a machine with a dedicated steam boiler."
Now whilst steam speed is not everything and sometimes a bit slower
makes it easier, there are times when I would appreciate a machine
that can heat a jug in 28 seconds rather than 60 seconds (like when I
have to make coffee for the whole family). I have owned both a Brewtus
III and now Brewtus Rotary for the last 5 years love the machines. I
did noticed a slight increase in steam performance between the two
when I upgraded. It is however no where close to what I get from a GS3
(haven't taken that step yet, still considering). I know that the
machines are not in the same price range but I would hope that the
Brewtus's steam would be slightly better than it is.
I have played around with steam tips using an 8mm to 10mm converter
and various steam tip. I have found that the machine simply cannot
deliver enough steam to power a tip with 4 holes properly. I
believe/hope that it is not because it doesn't have enough steam but I
suspect rather because the steam arm is restricting the flow of steam
from the boiler.
My aim is to try changing the arm to a standard arm to see if it can
drive a 4 hole tip with enough steam to be able to produce microfoam
(just not possible with current arm). I will also measure the time it
takes to heat water as a comparison.
JohnB
On Sat, Mar 5, 2011 at 3:27 PM, Kitt Johnson <[email protected]>
wrote:
John,
What are you trying to "overcome" ... i. e., what aspect of steaming with
the Brewtus do you see as "limited", and there-by unsatisfactory? (I am
guessing that it is the elapsed time required to raise the temperature of
5
oz of whole milk from 44 F to 155 F, but you could be trying to raise 16
oz
of milk in a large pitcher or unhappy with the nature of the foam or
something else.)
Would you mind telling me what (and perhaps how) you plan to measure as a
marker of the performance before and after switching wands? Do you plan to
use the same wand tip and same boiler pressure (=temperature) in the
boiler?
Just curious
Kitt
----- Original Message ----- From: "John Brinkman" , 2011 7:38 AM
Subject: Re: Steam Pressure
I am still convinced that the main limiting factor on the Brewtus
regarding steam delivery is the inside diameter of the "Cool Wand"
steam wand.
I am planning to replace my cool wand with a standard steam wand, do
some tests and see what the difference is in steam performance. I will
let you guys know what the results are.
JohnB
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