SL55/63/65/R230 AMG: Pierburg pump
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Joined: May 2009
Posts: 1,187
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From: Santa Clara, Ca
2003 SL55 / 2002 SLK32
guessing water (eg. cwa50, cwa100, or ZR1 pump) but peirburg also makes the stock fuel pumps for many of these cars.
If you are talking about water pumps, my experience (testing on my sl55 that has a second HE added in series with the stock unit) has been that the cwa50 pumps about 5gals a minute (against a head pressure of 10PSI) and a cwa100 pumps about 5gals in 43 seconds (against a head pressure of 12-13 PSI).
One good indication of how they are pumping (and if reasonably well bled) is if they are consuming current typical of fully loaded operation. In my testing (at 14vdc), when already bled, the cwa50 started up drawing 4.8 amps then settled in at 4.4 amps and the CWA 100 started up at 8.4 amps and settled in at 7.35 amps. However, when either was not bled properly, I observed them drawing less than half of their normal running current.
hope that helps,
Chris
Last edited by latemodel21; Jul 30, 2016 at 02:54 PM.
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From: Palatine, IL
Speedriven
which peirburg pump?
guessing water (eg. cwa50 or cwa100, ZR1 pump) but peirburg also makes the stock fuel pumps for many of these cars.
If you are talking about water pumps, my experience (testing on my sl55 that has a second HE added in series with the stock unit) has been that the cwa50 pumps about 5gals a minute (against a head pressure of 10PSI) and a cwa100 pumps about 5gals in 43 seconds (against a head pressure of 12-13 PSI).
One good indication of how they are pumping (and if reasonably well bled) is if they are consuming current typical of fully loaded operation. In my testing (at 14vdc), when already bled, the cwa50 started up drawing 4.8 amps then settled in at 4.4 amps and the CWA 100 started up at 8.4 amps and settled in at 7.35 amps. However, when either was not bled properly, I observed them drawing less than half of their normal running current.
hope that helps,
Chris
guessing water (eg. cwa50 or cwa100, ZR1 pump) but peirburg also makes the stock fuel pumps for many of these cars.
If you are talking about water pumps, my experience (testing on my sl55 that has a second HE added in series with the stock unit) has been that the cwa50 pumps about 5gals a minute (against a head pressure of 10PSI) and a cwa100 pumps about 5gals in 43 seconds (against a head pressure of 12-13 PSI).
One good indication of how they are pumping (and if reasonably well bled) is if they are consuming current typical of fully loaded operation. In my testing (at 14vdc), when already bled, the cwa50 started up drawing 4.8 amps then settled in at 4.4 amps and the CWA 100 started up at 8.4 amps and settled in at 7.35 amps. However, when either was not bled properly, I observed them drawing less than half of their normal running current.
hope that helps,
Chris
MBWorld Fanatic!
Joined: May 2009
Posts: 1,187
Likes: 239
From: Santa Clara, Ca
2003 SL55 / 2002 SLK32
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Former Vendor of MBWorld
Joined: Jun 2016
Posts: 416
Likes: 25
From: Carrollton Texas
clk and e coupe
which peirburg pump?
guessing water (eg. cwa50, cwa100, or ZR1 pump) but peirburg also makes the stock fuel pumps for many of these cars.
If you are talking about water pumps, my experience (testing on my sl55 that has a second HE added in series with the stock unit) has been that the cwa50 pumps about 5gals a minute (against a head pressure of 10PSI) and a cwa100 pumps about 5gals in 43 seconds (against a head pressure of 12-13 PSI).
One good indication of how they are pumping (and if reasonably well bled) is if they are consuming current typical of fully loaded operation. In my testing (at 14vdc), when already bled, the cwa50 started up drawing 4.8 amps then settled in at 4.4 amps and the CWA 100 started up at 8.4 amps and settled in at 7.35 amps. However, when either was not bled properly, I observed them drawing less than half of their normal running current.
hope that helps,
Chris
guessing water (eg. cwa50, cwa100, or ZR1 pump) but peirburg also makes the stock fuel pumps for many of these cars.
If you are talking about water pumps, my experience (testing on my sl55 that has a second HE added in series with the stock unit) has been that the cwa50 pumps about 5gals a minute (against a head pressure of 10PSI) and a cwa100 pumps about 5gals in 43 seconds (against a head pressure of 12-13 PSI).
One good indication of how they are pumping (and if reasonably well bled) is if they are consuming current typical of fully loaded operation. In my testing (at 14vdc), when already bled, the cwa50 started up drawing 4.8 amps then settled in at 4.4 amps and the CWA 100 started up at 8.4 amps and settled in at 7.35 amps. However, when either was not bled properly, I observed them drawing less than half of their normal running current.
hope that helps,
Chris
Junior Member
Joined: Mar 2018
Posts: 18
Likes: 1
From: SD
05' E55
Hey few years down the road but... I went to install my pierburg cwa100 in my 2005 E55, I soldered a power wire and ground wire to the adapter from VRP to the pump. the ground(white with a green stripe) went to a bolt on the car and the power (black) went to the add a fuse which went into the 53B fuse under the hood. I used a 15A fuse for both slots of the add a fuse but the top fuse for the pump keeps blowing. Any ideas? I was thinking cause I didn't bleed the system when installing the heat exchangers to fully get everything filled up the pump is not working properly without any water/coolant inside of it? Or did I mix up the wiring?
Junior Member
Joined: Jan 2010
Posts: 20
Likes: 1
2005 E55 AMG
Hey few years down the road but... I went to install my pierburg cwa100 in my 2005 E55, I soldered a power wire and ground wire to the adapter from VRP to the pump. the ground(white with a green stripe) went to a bolt on the car and the power (black) went to the add a fuse which went into the 53B fuse under the hood. I used a 15A fuse for both slots of the add a fuse but the top fuse for the pump keeps blowing. Any ideas? I was thinking cause I didn't bleed the system when installing the heat exchangers to fully get everything filled up the pump is not working properly without any water/coolant inside of it? Or did I mix up the wiring?
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Joined: Sep 2015
Posts: 367
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From: Dawesville, West Australia
2006 E55, 2006 SL55, 2006 LS7 Ute
I have a Pierburg 50 pump and a KC with drag valve on my SL55. In a 1/4 mile run starting at burnout, my tank water ended up at 18 deg C after starting at 4 deg C, in around 25 deg C ambient. My tank fits in the space taken by the auxiliary battery (now in trunk), so perfect volume for quick recovery according to the KC guy. Why bother with air to water heat exchangers when one can do a 1/4 mile run and still have your IC water well under ambient temp? Running a heat exchanger means your water temp is ALWAYS above ambient. Most of the tuners of blown LS engines here in Oz use evaporators also, as does the Dodge Demon and I would imagine the future blown C8 Vettes. By the way it was my E55 which leaned out in the post above.
Last edited by trabots; Jun 19, 2020 at 09:08 PM.
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Here some extra docs guys
On my custom V12 I ended up with
2x pierburg 7.06754.05.0 CWA100-2 One before and one after the full resized radiator
"always On" 10 sec delay Relay (own wiring)
you must remove the water pump Diagnostic setting in Xentry
On my custom V12 I ended up with
2x pierburg 7.06754.05.0 CWA100-2 One before and one after the full resized radiator
"always On" 10 sec delay Relay (own wiring)
you must remove the water pump Diagnostic setting in Xentry
resistor is not needed
I didn't put it on
here is my config:
edit: LOL just realised that the guy who made this pump picture did not design the pump flow direction correctly just that you know....
more infor here
https://mbworld.org/forums/m275-v12-...n-pumps-2.html
most info by the great Welwynnick
Last edited by pmercury; Jun 29, 2020 at 03:50 AM.
Member
Joined: Apr 2017
Posts: 92
Likes: 4
Sl55 amg 2002
MBWorld Fanatic!
Joined: May 2009
Posts: 1,187
Likes: 239
From: Santa Clara, Ca
2003 SL55 / 2002 SLK32
These run fine without a (real) PWM input (but you should hook the pump's PWM pin to +12 directly or through a pull-up resistor)
Last edited by latemodel21; Nov 3, 2022 at 11:35 AM.
Member
Joined: Apr 2017
Posts: 92
Likes: 4
Sl55 amg 2002
MBWorld Fanatic!
Joined: May 2009
Posts: 1,187
Likes: 239
From: Santa Clara, Ca
2003 SL55 / 2002 SLK32
I have tested quite a few different pumps BUT never compared the flow (or ever run) with the PWM pin NOT connected, so I can't say what the difference is (100% vs ? %) ... but since +12v is essentially a PWM signal at 100%, it is commonly assumed that this is the way to get the most out of these (PWM) pumps (and this is how Mercedes connected them).
Run wires to fuse box you ask ....
Are you using a cwa50 or cwa100. The cwa50 draws about 5amps and can run safely on the factory wiring ... the cwa100 pulls up to 8.2 amps (in my experience) and likely should have a larger gauge wire to play it safe.
If you are looking to connect your pump so that it runs whenever your key is on, connecting its power wire (through an appropriate fuse .... Mercedes used a 15amp fuse for the the cwa100) to a "circuit 15" bus in the fuse box makes sense.
Hope that helps!
Chris
Senior Member
Joined: Dec 2019
Posts: 407
Likes: 137
From: Houston, TX
2005 SL600
With 12v applied to the PWM pin, the CWA100 will run at 95% capacity (emergency running mode). Which is probably fine for our purposes.
If you absolutely must have 100%, or any other capacity, you'll have to use a PWM controller. Documentation is here - check the "CWA PWM Info" link near the bottom of the page.
According to this documentation, with nothing/no voltage connected to the PWM terminal the CWA100 will not run at all.
If you want full control, it's not terribly hard or expensive to incorporate a PWM controller. I've got one of these that I'll be using when I install my CWA100 in the next month or two. I'm doing this just because I'm curious to see how my IATs react at various flow capacities. Intercooler systems are tricky things; sometimes higher flow does not result in better heat transfer. I figure for $15 and a little extra wire, why not?
If you absolutely must have 100%, or any other capacity, you'll have to use a PWM controller. Documentation is here - check the "CWA PWM Info" link near the bottom of the page.
According to this documentation, with nothing/no voltage connected to the PWM terminal the CWA100 will not run at all.
If you want full control, it's not terribly hard or expensive to incorporate a PWM controller. I've got one of these that I'll be using when I install my CWA100 in the next month or two. I'm doing this just because I'm curious to see how my IATs react at various flow capacities. Intercooler systems are tricky things; sometimes higher flow does not result in better heat transfer. I figure for $15 and a little extra wire, why not?
Last edited by brucewane; Nov 3, 2022 at 03:58 PM.
Member
Joined: Apr 2017
Posts: 92
Likes: 4
Sl55 amg 2002
With 12v applied to the PWM pin, the CWA100 will run at 95% capacity (emergency running mode). Which is probably fine for our purposes.
If you absolutely must have 100%, or any other capacity, you'll have to use a PWM controller. Documentation is here - check the "CWA PWM Info" link near the bottom of the page.
If you want full control, it's not terribly hard or expensive to incorporate a PWM controller. I've got one of these that I'll be using when I install my CWA100 in the next month or two. I'm doing this just because I'm curious to see how my IATs react at various flow capacities. Intercooler systems are tricky things; sometimes higher flow does not result in better heat transfer. I figure for $15 and a little extra wire, why not?
If you absolutely must have 100%, or any other capacity, you'll have to use a PWM controller. Documentation is here - check the "CWA PWM Info" link near the bottom of the page.
If you want full control, it's not terribly hard or expensive to incorporate a PWM controller. I've got one of these that I'll be using when I install my CWA100 in the next month or two. I'm doing this just because I'm curious to see how my IATs react at various flow capacities. Intercooler systems are tricky things; sometimes higher flow does not result in better heat transfer. I figure for $15 and a little extra wire, why not?
95% i think i can settle with but you are saying for that to work, i cant just connet pin 1 ground and pin 4 12v? I also need to link pin 3 with 12v to ?
