Hi everyone. I now have 3 LSM machines, two 85's (1 lever) and one 80 (just purchased, lever), and after thinking and thinking quite a bit about the technology and changes of the machines, I now think I understand why LSM got rid of the heat exchange (hx) system starting with the 85 series. In the 80 models, cold water goes thru the hx system, heats up, then joins up with a tiny bit of the residual hotter water sitting behind the group, then enters the group, then producing coffee. If you do not have a constant flow of cold water entering the hx, you cannot produce many coffees, even if your boiler is full. So if you fill the boiler, then turn off your water line, then you will make a drink or two, but then no more coffee since the hx is no longer receiving water, thus no more water to the group.
Another problem I see with the 80's is that water in the boiler is never fully being replenished, drained, unless one is continually draining the boiler, either by making a lot of tea drinks or americanos or steaming a lot of milk. The water for the group/coffee is coming 99% from the cold water that went thru the hx from the incoming water line and 1% from what was in the tupe/pipe that sits inside the boiler. In my 85 Leva, I see that LSM got rid of the hx tube, and hence the top little hole where water enters to the back of the group, so LSM must have obviously thought that this was a more efficient way to continuously produce .9 Bar pressure water for coffee. Water heats up, then exits the boiler thru the big tube/pipe, to the group, then we get coffee. On my 80, my idea is to a-plug up the hx tube holes in the back of the boiler, b-plug up the small holes of water entering the group and to c-make a hole on the big pipe that sits in the boiler, thus allowing water to enter the group, and hence convert my machine into an 85. This should work fine. Am I thinking straight, or am I missing something here?
Putting disc brakes on a drum brake system,