turbonutter

OK so made a different test rig, with a 12L bucket reservoir instead of a 5L bottle, also put the pump a bit lower down, It seems I was getting air in the pump, as I now have:

3.2PSI , 51 l/min at 12.4V 8.5A
12.5 PSI, 35l/min at 12.4V 8.2A

Which corresponds with the posted curves pretty well, so looks like yhe pump is running full speed

Welwynnick

Many thanks for the idea. Its interesting that you can use AC adapters on the IC fill valves.

Did you try evacuating the IC system through the charger cooling filler?

I think that's what the vacuum re-filler is intended to do, as it's usually the only service point on cooling systems.

I got fed up trying to bleed the IC the hard way, so I'm just about to buy a vacuum re-filler as well. I'm more and more convinced its the only way to do it.

Nick

pmercury

iTrader: (2)

Nope, mercedes says to do only the direction I am showing on the picture
this is the third time I do this, tested the car with the CWA100 pump, no more foam
JUST PERFECT

Welwynnick

Yes I know, but then Mercedes designed the V12 IC system, so they're not infallible.

If you use a vacuum re-filler, it shouldn't matter where you drain or fill the system.

I'm interested that that you say "no more foam", which I think is the real enemy. How do you know whether there is any foam? Where do you see it?

Thanks, Nick

pmercury

iTrader: (2)

I'm just back from a long hardcore drive
CWA100 is what you want
I can keep boosting and boosting
with correct vacuum refill, no air it all works like hell
and no Always ON needed and no resistor needed
just hook the CWA100 up with the 3 connector system and no resitor and you'r done

only thing you need to do is build a custom socket for the pump as size is verry different

Welwynnick

So you're saying you know it doesn't cause foaming because the IC system is working well? That's OK, a tiny bit of air causes a lot of foam, and that kills the flow rate and the thermal capacity, and the engine falls on its face.

What vacuum pump did you use?

Nick

pmercury

iTrader: (2)

my own home made
see picture up in the article
50$
just make sure you circulate 2x 10 min to be 100% sure no TINY bubble remained.
third day driving today, my CL boosts like hell

turbonutter

Ok I have now installed the pump in my car - a Lancia Stratos replica, I was using a davis Craig EWP115 & that gave 25l/min, I now have the CWA100 installed in series after the EWP115, both pumps are before the radiator, the EWP is in the rear of the car & the CWA100 at the front.

Running the EWP alone I now get 22l/min (less due to the restriction from the CWA pump, with 3.5-4psi at the radiator.
Running the CWA100 alone I get 35l/min & 7psi
Running both I get 42l/min & 8.5psi at the radiator.

I have a PWR Barrel charge cooler & the pressure before that is correspondingly 0.5-1PSI, 1.5PSI & 2.5-3 PSI

My target was 50l/min, so I may try using 2 CWA100's

The CWA100 is definately a good pump, especially considering its size!

Hulk

Get rid of the craig and use 2 cwa100

ghlainez

Has anyone installed this pump on the E55

austingtir

Yep its good. Seem harder to find on ebay now though.

I want to buy another one so I can run two at the same time.

ghlainez

austingtir with this pump why would you need a second one. may be an overkill no?

austingtir

Dunno about overkill but its working fine as it is with one and no other mods to the cooling system. I feel if I add another heat exchanger or a trunk tank (I personally think trunk tanks are overkill but thats probably just me) id be adding more resistance to the system so add another pump to get it pumping through at a good speed.

One of these pumps with a secondary heat exchanger is probably good enough for any car on here though I would expect other than the guys pushing their superchargers really really hard.

pmercury

iTrader: (2)

yes
or a 150 I used, no resistance, no relay, just always on with egnition
perfect

ghlainez

Austin how did you run the wiring? I read the all the posts but I'm still confused. I have a split system with engine bay tank. I currently have the Bosch-10 pump and I'm running it to key turn power.

austingtir

Same as the diagram in this thread with a resistor. I have no idea if its running full power or not didnt bother to test that. All I know is it kicks the stock pumps ***. I wired it into the stock wiring it was drawing about 6amps I thought that was ok. There are specs from the manufacturer that claims a 10amp draw. Im yet to see anyone prove that.

pmercury

iTrader: (2)

again, again and again
listen guys
I have the 150 pump on my car since 6 month
perfect and no problems

1 hook it up to stock wiring
2 set it ALWAYS on, as the pump has a delay to start up that is the best solution
3 NO resistor required
4 you must make a bracket yourself

pmercury

iTrader: (2)

I am now upgrading to full size S600 intercooler radiator
price is 250 euro on ebay from germany

austingtir

It would be interesting if you could chuck an ammeter in your circuit to see the current draw with no resistor?


I like that heat exchanger. I fitted a air to air tran cooler in behind the stock center hood latch and I have factory power steering coolers against the main radiator so this unit is a no go for me.

I think I might use one or two oil coolers for my additional coolers when I get to it as they will fit around my trans cooler better.

Tommyboy928

i can take this pump

torquemaniac

Not a MB owner, but I have found some very useful stuff here for the selection of my intercooler pump, so I will share my finding for the CWA-100 pump :

Connector : https://ca.mouser.com/search/Product...71-1-1718645-1
Terminals : https://ca.mouser.com/search/Product...=571-1452671-3
Wire seals : https://ca.mouser.com/search/Product...r=571-967067-1

Those are the generic connectors assy if you dont have a BMW dealer near you (I ordered those and they fit perfectly on the pump)

The pump will not run at full power if the #3 terminal is connected to a 12V supply...the pump need a PWM signal

I ordered this signal generator to control the pump : http://www.icstation.com/signal-gene...z-p-12477.html

At 150Hz and 86-97%DC the pump run at full power

Crissus

Very good finidings... i always doubt that my CWA-100 run at full power only consuming like 6-7amps...

How may amps/watts can this signal generator stand?

In future on my CL55 AMG i want to put the intercooler in front of the AC condenser. Currently its the other way around and as soon as AC runs, IAT goes up tremedously

alexanderfoti

Has anybody actually tested this?

I can only find datasheets for the CWA-200

The CWA-200 runs at 100% duty cycle if battery voltage is present on the PWM Pin.

Ill have to re-wire up my CWA-100 if nobody can confirm.....

I think the CWA 100 draws 100 watts @ 13v this should be roughly 7.5 amps.

edit: although Techmotive says:

Pierburg CWA100

Name: "Pierburg CWA100"
Supply voltage: 8-16 Volt
Current consumption: max. 13,5A in operation and 0,2mA in standby mode
Differential pressure: 0.85 bar
Flow rate: 30l/min @ 0.85bar / 40l/min @ 0.65bar
Protection: IP67
Part numbers: Pierburg - 7.06754.05.0 // Mercedes: A 000 500 04 86

So looks like 110watts max.

kaype

CWA 100 runs without PWM Signal at 100%.
CWA 50 needs PWM Signal
CWA 200 ... no idea.

7.5Amps at full load but i dont think you will ever have full load when the water is flowing. Maybe at startup without any circulation...

alexanderfoti

Thank you sir.