blkbrd

I have been shopping for a new intercooler pump for my Cl55 since the stock one retired on me yesterday. Luckily I had a new Jabsco replacement IC pump for my GMC Typhoon to install until I sort out what pump is best for my application. During my search I came across a comparison test on another forum. If this is old news then disregard.

http://www.lingenfelter.com/LPEforum...esting-results

JPhamily

what were your symptoms when your pump went out? Car still drove but just no power right?

Crissus

More or less old news...
In the V12 Section, a guy named Welwynnick or something in the line of, made some amazing topics:
It all started here: https://mbworld.org/forums/w211-amg/...now-about.html
Then went here: https://mbworld.org/forums/m275-v12-...ion-pumps.html

i dont remember if there was a 3rd topic though.
I went with the mighty CWA-100 pump by Pierburg.

blkbrd

I noticed a gradual reduction in power that regressed into a major loss in power. After the loss in power if I cruised at 70 for a few miles the power would come back but it was short lived after the initial heat soak. Things are back to normal after installing a new pump.

As for Crissus, yes the topic is old, more than a couple decades old but the information on the link that I posted is far more in depth than the ones you posted in reference to my initial post. The MB is the 3rd liquid IC vehicle I have owned the first being the GMC Typhoon that I still own and the second being a 2nd gen Lightning that I no longer own. It seems that nothing significant has changed with these systems since they were first introduced in production vehicles.

Welwynnick

Yes, I added those Lingenfelter test results to the thread in Nov '13 in this post. I added their test results to other pressure/flow curves that I'd from other sources, and combined them here.

This was rather a pain, as Lingenfelter used imperial units, while everyone else use metric. They also used pressure (instead of flow) as the indepenent variable (unlike everyone else on the planet, unfortunately). That made transcribing their results very tedius.

However, the results are invaluable, as they show the difference between installed and open pipe tests. They key findings being that pressure is more important than flow, and the Johnson CM30 and Meziere WP136 really aren't the good choices that people thik they are.

https://mbworld.org/forums/m275-v12-...ml#post5836390




The EMP WP29 really is the daddy though, if you can find a way to control it (which I haven't yet).
Nick

Dr Matt

That's kind of a bummer to see that the Meziere pump I just installed does not really perform that well. I have put up with hight IAT's killing power since I got my car thinking the stock system just sucked since my pump was replaced under warranty less than a year before I bought my car.

Turns out it was probably just because the dealership who worked on my car for the previous owner just sucked. When I removed the stock pump I only lost about a cup of coolant. When I vacuum filled it back up I added about 3 quarts. After installing the Meziere my IAT's are 40-80* cooler than before. Turns out the stock system is not so bad if the pump isnt sitting in a big air pocket.

Welwynnick

You're probably right there, bleeding is critical, and its a TERRIBLE system to bleed. I took a week off work in 2013 to do IC flow testing, and I spent nearly all my time bleeding, and hardly got anywhere. Even when you're careful, its easy to leave air in the system, and that destroys the flow. The pump spins fast, and especially when there's antifreezed in the coolant, it froths everything up very fast, and that chokes the pump. Of course, with the stock installation its impossible to see this, or the drop in flow, but I've done things a bit differently.

The stock system is full of air locks, and vacuum filling is the only reliable way to fill it. Even then, I don't think the Mercedes filling rig is adequate, as the vacuum doesn't go low enough to boil the coolant inside. I think you need a proper high vacuum, single stage, vane pump to evacuate properly (like AC service shops use). My alternative was to use an upside-down, back-to-front BMW X3 radiator, use the drain valve for bleeding, and use the fill ports on the charge coolers as bleed ports, in conjunction with the swirl pot.

I don't think you need a big heat exchanger or a big pump to make the IC system work, but you do need a way to get all the air out.

Nick

MB-CLS500

I am buying EMP pump tomorrow for my CL600 W216 what do you mean by to find a way to control it ? It is not just easy replacement ?

compaddict

iTrader: (1)

Interesting stuff!

GatorMB

Hmmm!

Does this pump have a modulating input from the OEM application?

spastik monkey

So what ended up being the top choice? That chart is hard to read from a cellphone screen.

Welwynnick

The best IC pump is the EMP WP29, no question.

Nick

fastlife23

Nick for normal applications is the bosch oem pump adequate for a car that gets driven at the most once a week? I don't want to splice wires and keep things stock

Welwynnick

Sure it is - as long as it's working OK (and I bet many of them aren't).

I think making sure the IC cooling system is full and free of air is more important than which pump to use.

Nick

stuartph

Nick

is it this one

Welwynnick

It certainly is!

Just make sure you don't get the 24V version.

vee12

So has anyone figured out a way to control the EMP WP29 pump in our application? It's obviously a badass pump, but will it work in a w215/216/221 without a Frankenstein re-wiring job?

stuartph

Thanks Nick

can it be run off the standard plug or does it need new plug and different powering like from a new relay