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  #531  
Old 12-14-2018
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Once you produce the needed "one point twenty-one jigowatts", will you be able to hit the needed 88mph, and what's your first stop?
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  #532  
Old 12-14-2018
DW SD DW SD is online now
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Super cool stuff you are doing. Your projects remind me what an amazing world we live in ... sharing of info and ideas via internet is really incredible.

Are you a user on hackaday.io?
I stumbled across that sniffing around to look at Tesla module BMSs.

Thanks for the updates! They really make me think.

Best, Doug
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  #533  
Old 12-14-2018
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Bob - not quite done, there are projects aplenty! This solar one is a major one though, I have spent a lot of time making sure this will actually work up there. I can't imagine parting with it! It's my baby.

Matt - it will never achieve 88mph nor 1.21 GW. lol.

Doug - I look at projects on Hackaday here and there. A few years ago they were sold and the new owners seem to put a lot of kindergarten-level projects up there now. Before that it was a little more advanced and a lot more interesting.
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  #534  
Old 12-27-2018
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I have started working on getting the chassis heaters all hooked back up. When I bought the bus it came with a box that had all the valves, elbows, and pumps that used to connect to the engine, water heater, and chassis circuits.



I plumbed up the chassis heater circuits and flushed them out and a lot of mud came out, but they are nice and clean now. I have to test the valve for the front heater that's above the step, but I might just replace it.

The pumps are seized up tight so I looked into some alternative options with the goals of easy speed control and power savings. I ended up with a pair of Pierburg CWA50 pumps used in a bunch of cars as intercooler pumps. They are brushless and outflow the CP20 by a little bit. They also use less power and I believe I will be able to slow them down quite a bit to save some more power. They have a built in controller so I just give them +12/ground and a control signal (PWM) to change their speed. The reason to slow it down is to use less power when I'm not plugged in and running the proheat/webasto if I do finally get them.

Here's the pump:

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  #535  
Old 12-27-2018
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Andy, FWIW.. I pulled the pumps. Still get plenty of heat with the engine circulating the coolant using its own water pump. Could never get them to handle the hot engine water without developing leaks around the pump shaft seals.

If you get a Webasto Thermo 90 or something similar, it has it's own pump.
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  #536  
Old 12-28-2018
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Shane - that's good to know. I knew the heaters have a pump, so I'll have to cross that bridge when I get to it.
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  #537  
Old 12-28-2018
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Andy, Mercedes Benz used an aux electric water pump in the 1980s and 90s, not sure that Intercooler pump was meant to hold water? Just a thought.
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  #538  
Old 12-28-2018
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Quote:
Originally Posted by chiplamb View Post
Andy, Mercedes Benz used an aux electric water pump in the 1980s and 90s, not sure that Intercooler pump was meant to hold water? Just a thought.
Chip - this pump is a water/coolant pump rated up to 250F in continuous duty. It's used in turbo BMWs, some Mercs and the GT500 Mustang among others. The Groco CP-20 is actually only rated to 200F for what it's worth.
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  #539  
Old 12-28-2018
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Bueno! No wonder why they fail with some regularity.
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  #540  
Old 12-28-2018
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2 birds never run the pump.
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