A 4 oz. flush, and the machine holds temp at 1/10th for the duration of the shot.......A miracle? Naw, just some tweaking and some ideas culled from CG and HB. When you adapt all of these ideas, the results are very cool and inexpensive.
Thanks to all of you who have followed along with this thread.
Dom, I will see you on Sunday, Sunday, Sunday....................
What are these ideas for holding temperature so stable? Is it related to an HX with high thermal mass? Maybe one PID is dedicated to steam/cold mixing and the other to boiler temp? Active group heating? High capacity HX? My mind is crawling with ideas!
Posted Sun Oct 9, 2005, 3:12am Subject: Re: Espresso Doms Killer Wega Lyra
terryz Said:
A 4 oz. flush, and the machine holds temp at 1/10th for the duration of the shot.......A miracle? Naw, just some tweaking and some ideas culled from CG and HB. When you adapt all of these ideas, the results are very cool and inexpensive.
As much as I dig the facelift including the steam wand, stealth black switches, and dual pressure guage, it is your statement I quoted above that interests me the most. I run my machine at 1.15 bar at the top of the boiler cycle, and I find that I need at least a 8 oz flush to get the brew temp down to usable territory.
Hard to tell from the pics you posted, but I am guessing you played with the length of the copper tubing that joins the grouphead to the HX. Am I warm?
Other mods that I can see are the (obvious) rotary pump, weird looking pressurestat (I believe Dom was running a Sirai), LM style steam wand. I am also assuming that you swapped out the heating element, as everyone knows that the stock element that WEGA puts in their machines is far too wimpy.
So - come clean - you know we are all going to want to jump on this bandwagon...
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