It seems like the Pierburg pump is working in an E55 and runs about 3x as much water as the EWP-80.

I'll order a Pierburg which is in the Black Series and give it a try.

Nick , I have my half front end of the car, I also bought a Bosch 010 pump accidentally , I want to run a second HE cooler, a few questions.
1. do you suggest I do this, will it improve cooling?
2. if I did should I run the second pump I bought? if so how far apart?
3. Should I wire them to run on always, or leave the system as it is per factory?
4. is the coolant type the same as the cars motor coolant?

sorry for so much questions. But you seem to be the man to talk to regarding the V12 cooling.

Thanks in advance

The answer is on post 228.

This is all the information that I have:

http://s1.teamlearn.de/QuickPlace/b-...0waterpump.pdf
http://webpages.charter.net/n8nxf/EV...ant%20Pump.pdf
https://mbworld.org/forums/m275-v12-...ml#post6395913

1. Yes, two intercoolers will improve cooling, but I would run them in parallel rather than series, to avoid reducing the flow through the IC's.
2. Yes, running a second pump of the same type is always a good idea, as long as its installed properly, and doesn't cause airlocks.
3. I wouldn't run a CWA-100 always, as it tends to froth the coolant, but the Bosch is OK. Only problem the commutator bushes wear out, so the motor doesn't last very long. The Pierburgs don't have that problem.
4. Yes, the IC uses the same coolant as the engine, though I would run a lower proportion of anti-freeze.

Nick

How do you suggest I run them in parallel , each inter cooler has its own cooler or just run both coolers of a dividing y pipe splitter ? Also about the pumps should I wire them to run continuously as the car is turned on , or leave as factory set up ? Thanks heaps again

This is what a parallel intercooler configuration looks like, schematically:





And this is what it looks like in practice. On my car, at least. Mercedes use metal pipes with right-angle T-junctions, which limit flow.





You can find the Y-pieces by doing an eBay search for "3/4 Y connector"

Nick

I have two pumps , plus a spare Ai condenser which I've been told is best to use as a cooler for the IC system including the stock unit, however the inlets on the condenser are tiny , would putting a y pipe connector with a reducer work ? One would think it would restrict the flow

It was one of the first things I thought of three years ago, but I wouldn't consider using an AC condenser, as the coolant flow would be too low.


Nick

What about if i air die grind out the pipes from the AC line (tiny piping) to the standard 3/4 piping, would that fix the flow issue ?

Sorry i forgot to add into the digram the heat exchangers too, but you get the gist of my idea

Yes that would work well. Just make sure you get all the swarf out of the pipes.

Nick

Could anyone chime in with CWA-100 part numbers, please (BMW preferred)

Is BMW E60 - 5 Series = Electric Water pump 11517586925

an intercooler or engine water pump?

The pump in the picture is an engine pump.

Nick

I used Pierburg CWA-50, -100 and -200 pumps on my car, largely because I couldn't find any CWA-400. In fact, I didn't think there were any, but I found this on ebay.de last night:

http://www.ebay.de/itm/Tecomotive-ti...IAAOSw14xWLrEw

I used to think they were superseded in the BMW line-up by the VDO pump, but that's not the case. They do exist and they are commercially available. They use different electrical connectors, but I don't think that's a problem.

I'm just trying to figure out how to reliably identify one, and what the part numbers should be. You can't believe everything you read, especially from someone selling car parts. I think the best guide is that this pump was used on the BMW 4 cylinder 2 litre turbo engine, used in the 328i, 428i, 528i and similar models. I'm not 100% sure yet, but I believe the BMW part numbers are:
11517596763
11517604027

I believe this is the Pierburg part number for the CWA-400. I've seen other P/N's used, but I don't think they're right. The -66- dash number appears to be the most common, but there a dozen others.

7.03665.66.0



The CWA50 and 100 look alike. Some have quick-fit ports, and some need hose clips. You can't distinguish them by appearance.

The CWA200 has 4 bolts holding the impeller housing, and two bolts holding the electronics housings. The CWA400 doesn't.

The CWA50 & 100 use the same connector, but otherwise they all use different connectors.

Nick

To complete the picture, this is the Siemens / VDO / Continental pump that's used on the 3.0 litre turbo gas engine in the recent 135i, 335i, 535i, 640i and similar.

Common BMW part numbers are:
11517563659
11517588885
11517632426

I believe two VDO part numbers are
A2C59514607
A2C53326031

Since this is used on the bigger engine, I presume this is even more powerful than the CWA-400 pump, but there's not much information about it.

http://ows-cdn.tecdoc.net/vdo/home.j...37ef248a4c0a90

It looks like the connector is the same as the CWA400, but hard to be sure.
Hopefully the control signals are the same, otherwise not much interest in the context of this thread.
I've just bought one to play with, so will find out soon.

Nick

A datasheet at last - hurrah!

http://www.easycarparts.nl/Controls/...9514607_DS.PDF

Operating point 0.80 bar at 9000 litres per hour = 150 l/min

So about the same as the CWA400.

Nick

Excellent Info.Thank you very much,especially to Nick.

Now my Pump seems to be dead, checked Fuse and it was o.k.

Want to get the CWA100 now. Is the latest info still without a control module Ground1 ,Battery4, 1.5 kOhm resistor3 and it works with (nearly) 100% power? What are the connecting parts and mounting brackets? Anywhere good prices for the pump, and is the cwa100 worth the price in daily driving over the cwa50 which is also used in many VW/Audi applications. Many thanks!

Send me a PM.

Does anybody know how much Volts and Amps our Cars use for powering OEM intercooler pump? 12v 14v or 24v?

We have a 12V battery on board.

I bought EMP WP29 pump it operates 12v and 24v I want to install it on my 07 cl600 with 24v is there anyway to attach + - wiring on to battery and amplify it to 24V?

2 x 12V and you got your 24 V. Problem will be that the rest of your car won't work anymore bc it blows up but hey you got your 24V pump going

But on a serious note: I'm sure the specs read it can operate between 12-24V and not 12 or 24 V.

on 12v it flow 25 gpm and 29 on 24v thought i could squeeze 4 more has anybody here ever installed EMP pump on their mercs?

I believe the WP29 comes in either 12v or 24v versions; they're not multi-voltage.

Have you downloaded the manual? Lingenfelter are a lot of help with these pumps.

http://emp-corp.com/support/marketin...MarketingID=99
http://emp-corp.com/support/marketin...arketingID=107

Nick

I am about to buy this pump so it either 24v or 12v? on this one it says 24v on the back so I wont be able to make this pump work on my car? its w216 cl600
This is what I found on CTSowners forum
Quote : Stewart EMP WP29 Water Pump

Selling a used Stewart EMP WP29 Water Pump, 24v version with 1"inlet/outlet. Used it with 12v for about a month and it works great! Need to install a G-force intake which routes exactly where this pump is mounted and can't find anywhere else to easily mount, so my loss is your gain. Looking for $310 shipped, also comes with brand new Deutch connector. These retail for almost $500
Will be taken out today so i can post pics later on.