I'm pretty sure the 24v pumps are different to the 12v pumps. eBay is full of 24v pumps that no-one wants. The inverter would work - that's what they're for, but its an additional complication.

nick

Yes, I have two of these adjustable units sr-700-adj that I think would do the trick in parallel.

http://www.powerstream.com/dc2.htm

They have a fixed 24V version that is a bit cheaper but I still think you'd need two. The great thing is they have an ignition input trigger to turn it on so you don't have to use relays or whatnot.

That's a good result. 30% more flow corresponds to 120% more pumping power, due to the increased pressure (assuming everything else stayed the same).

If you look at my chart above, it predicts the flow would go up from 14 to 17 lpm, which is 21%.

Nick

The Pierburg CWA100 is also used in AMG Black Series. I'm still waiting for mine to come in ;)

BMW does use them, too.

Actually, one of the boosters MIGHT handle it. 276 watt continuous rating = 11.5 amps at 24V. The EMP PDF says the 24V pump draws 15A peak current. That would be with max load, so 25psi of back pressure. So actual amperage in our system may be quite a bit lower. I bet one boost converter could handle it with additional fans.

Do those require a controller though?

Yes I was seeing that on page 9 with charts but I am very confused . I am gonna contact that guy too from CTSowners forum who said that he was running 24v EMP WP29 with 12v :hammer::hammer::hammer:

Yes, everything else was 55K AMG stock. Just one additional/larger HE

Build in controller. Plug and play by using an old Bosch OEM pump's electrical connector that I'm going to solder onto the cable. The pump will run on 100% at all times.

So the advantage just being that they're half the cost of the WP29?

So you bought that emp pump from ebay?? I am gonna buy it tomorrow and make it work

has anybody had experience with these pumps? ( http://daviescraig.com.au/electric-water-pumps ) scroll down and you will see products this EWP130 that comes in 12v and 24v versions and has gpm rate of 30.4 gallons

Not sure what you mean but I like the idea that they use them in Black Series cars as their preferred OEM IC water pump. And with the plug mod I have it literal plug and play without soldering/cutting on the OEM cable harness.

You'd have to find flow data vs pressure. I mean my 55gpm pump on the Buick works great...with 1.5" lines and feeding all the intercoolers in parallel. But with the 5/8" lines I started out with it didn't flow crap.

Yes, I got mine used on ebay as well. But I wouldn't buy a 24V pump and try to run it on 12, at least not without some testing first. I had always planned to boost mine to 24V power.

I mean that on Nick's flow chart compilation, the CWA-100's performance is dramatically eclipsed by the WP29. However, I'm sure the WP29 draws a heck of a lot more current and the stock wiring probably wouldn't even handle it. Also, the real world system performance with the flow difference from the 100 vs the WP29 might not even change a measureable amount at the horsepower levels we are generating so it's probably a pretty good budget upgrade without going overboard.

If someone wants a brand new EWP-80 I have one left over. Unopened box. I wanted to put that one in but didn't find the time.

There are some 12v to 24v converters online what if we use those but I dont understand why that guy from ctsvowners forum said that he used 24v wp29 with 12v I regitsered there and asked him for some input already I also sent questions to emp-corp.com and stewartcomponents.com

see the ewp130 flow vs pressure chart I cut out that chart from big pdf document and its a little bit blurred

It looks like a lower pressure pump (I think that's .6 bar at the peak, vs the 1.7 bar or so that the WP29 is putting out)...but the flow looks pretty decent. I certainly wouldn't pick that over the WP29 though.

Yeah, you could use a converter but you need to look at the continuous current rating. If the 24V pump really draws 15 amps, you need to really plan for 360w continuous to be safe if the pump operates at or near max current. I think you'll find a converter that will put out that much continously, plus the cost of the 24V pump will add up to more than the cost of a new 12V pump in the first place.

Also, I mean some companies advertise the modified ones that have a different speed/current limit. Like the lingenfelter pump. I had seen it discussed somewhere (maybe even in this thread) about it being something relatively simple to get the extra performance out of it without buying their more expensive pump, but don't remember where I saw that.

http://www.lingenfelter.com/product/...l#.VyVaLNQrKt8

this is screenshot from wp29 manual pdf does this confirms that its multi voltage pump?

I don't think so. I think they are saying that the pump is available in both motor configurations. I am pretty positive they are different motors and are not able to be run on that different a voltage without performance or longevity concerns.

Lets wait when emp will answer my question if it multivoltage or not I hope that it is because I will buy it tomorrow if they answer me or not

I'm off work tomorrow, so I could possibly do the flow tests on my pump at 14V off a running vehicle vs 24V off my power supply just to give you an idea of the flow rate. I don't have an extra heat exchanger but I could run it through a pair of spare stock intercoolers in series which would certainly simulate some of the system backpressure (although I feel much of it is in the heat exchanger).

I also don't have a wiring harness for it, so I'll probably have to solder leads onto the pins or something. Don't count 100% on me getting around to it...but I'll try it if I have time.

There's a lot of discussion of DaviesCraig pumps early in this thread. They have similar characteristics to the Meziere WP136, Johnson CM90 and Jabsco 50840, which are engine cooling pumps, and tuned for a different system resistance. They have too high flow and too low pressure for IC systems.

Nick