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Intercooler Pump you didn't know about

 
Old 02-19-2018, 01:48 PM
  #201  
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The Pierburg pumps seem to pull a bit less current than you might expect.

Current draw generally increases with increasing flow, but not in proportion, it increases more slowly.

The CWA 100 runs about 6 amps and the 50 about half that. Can't remember what the 200 ran at - it might be in my charge cooling thread.

Pretty sure all the Pierburg pumps run with DC into PWM.

Nick
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Old 02-20-2018, 01:11 AM
  #202  
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04 E55 AMG, 14 E350
Originally Posted by Welwynnick View Post
The Pierburg pumps seem to pull a bit less current than you might expect.

Current draw generally increases with increasing flow, but not in proportion, it increases more slowly.

The CWA 100 runs about 6 amps and the 50 about half that. Can't remember what the 200 ran at - it might be in my charge cooling thread.

Pretty sure all the Pierburg pumps run with DC into PWM.

Nick
Yep the cwa 100 only draws around 6-6.5amps in the stock intercooler and heat exchanger circuit. I posted pics of my amp meter connected in the circuit at one stage but must of been in another thread. Im even using the stock wiring. The talk of needing a relay and all that is rubbish imo.
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Old 09-04-2018, 12:39 PM
  #203  
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So just wire this pump into the stock wiring for the intercooler pump?

How do I get it to be always on this way?
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Old 09-04-2018, 12:41 PM
  #204  
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Originally Posted by MACEDON View Post
So just wire this pump into the stock wiring for the intercooler pump?

How do I get it to be always on this way?
+1
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Old 09-04-2018, 12:44 PM
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Connect battery to +12V
Connect ignition to PWM
Connect ground to ground.

Nick
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Old 09-04-2018, 02:05 PM
  #206  
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Originally Posted by Welwynnick View Post
Connect battery to +12V
Connect ignition to PWM
Connect ground to ground.

Nick
Are you referring to: connecting the stock pump wire to the cwa100 plug pin out

or

are you saying to connect the pump to any 12v source, then do the rest?

Because if it's the second option, that's the hard part that I don't know how exactly. Especially what the hell is PWM...
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Old 09-18-2018, 11:26 AM
  #207  
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05 E55, 98 CLK320
About to wire this pump to the stock plug on the car, gonna cut it, use crimped joiners to join the wires to the pigtail from tecomotive.

Any objections?
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Old 09-18-2018, 11:32 AM
  #208  
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Pretty sure that stock wiring is too thin to support the current draw of the 100.2, especially if you're going to have it running constantly with key on.

I always create a ground close to the pump location and run a new heavier gauge wire to an empty slot in the passenger side SAM (SL55). This allows the pump to run constantly with key on and adds safety insurance with heavier gauge wire.

Originally Posted by MACEDON View Post
About to wire this pump to the stock plug on the car, gonna cut it, use crimped joiners to join the wires to the pigtail from tecomotive.

Any objections?
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Old 09-18-2018, 12:09 PM
  #209  
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Originally Posted by MACEDON View Post
About to wire this pump to the stock plug on the car, gonna cut it, use crimped joiners to join the wires to the pigtail from tecomotive.

Any objections?
Crimped connectors tend to corrode and fail. It would be better to solder it in with shrink tube to cover.
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Old 09-18-2018, 12:21 PM
  #210  
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Originally Posted by StarvingArtist View Post
Crimped connectors tend to corrode and fail. It would be better to solder it in with shrink tube to cover.
Good point, that is the proper solution.

Just wondering if someone's done it this way other than pmercurry who claims to have run his pump for a year this way.
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Old 09-18-2018, 01:00 PM
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2005 E55
I have crimped connections all over, meth pump power, solid power, wideband power. Depending on what I want where I'll use crimped on bullet connectors if I think it would be convenient to disconnect easily. I solder all control signal type connections like taps into sensors or RPM signal or anything like that but that's pretty much it.

Been doing it that way on several vehicles for the last 10ish years and I have not had any failed electrical due to the crimp on connectors of any type(knock on wood)
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Old 09-18-2018, 01:43 PM
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Now let's hope I don't fry the stock wiring
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Old 09-19-2018, 05:06 AM
  #213  
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Mines been wired through the stock wiring for a couple years. Soldered connections. I tested the amp draw its probably in this thread actually. Mine was drawing like 7amps or something.

I was fairly satisfied the wiring was fine.
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Old 11-05-2018, 06:34 PM
  #214  
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I can't get this **** to run.

I have pin 3 and pin 4 together on + from bosch wiring

and pin 1 to negative from bosch wiring

what the **** is the problem I don't understand
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