If an 044 is not up to the job, the next good single pump option is known as the Pierburg 800. Actual model number is 7.00228.51.0. Flows more than an 044 at higher pressure and is not too expensive.

This is what I am going to be running in my V12 conversion with E85 and current potential estimate of 500rwhp. They are relatively low current draw and even better, they are much quieter than an 044 being a screw type design. They are the OEM pump on some model SL55 I think and for what they are and what they flow, they are quite cheap as well.

I have thought about that pump since it is external. Did not know the flow rate. What did it cost you. I have not priced it out.

Well it cost me $330 aussie dollars from a local Australian retailer.

I imagine it'd be cheaper in the US.

Whipplem104, what pump setup did you run till now ? I'm wondering how much hp the stock setup can handle (dual pumps in my case). I'm considering switching the stock in series dual pump setup to parallel.

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190E 3.0-24v (M104 980) turbo @ 0.8 bar
1/4 mile: 2.483 / 13.540 / 175.17 km/h (street tires)

The stock pumps were good to about 300whp. Maybe a little more. If you remove the check valves in the outlets you can get more out of them. I think they are 190l/hr pumps. I have had a walbro single for the last couple of years. Stock fittings with stock filter and the check valves removed. So that is good to 400whp on e85. I run out at 4250 rpm with that pump and then I added a single stock pump as a feeder and still did not change. I will try e85 on the 044 this weekend. If that does not work I am going to put the walbro back in as a feeder pump. If that does not work then another 044. Or maybe the pierburg pump that Bahaimus suggested. Then lines and so on. I do not think the lines are an issue as the 55k cars and 65tt motors do not really have bigger lines. Also many people making a lot more hp with about the same size lines. I am just going to piece it together to find out.

The Pierberg 800 bahaimus suggested seems to retail for about 300USD here and came out of the SL55k cars. Apparently flows 360l/hr

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1993 190E 2.6 Sportline

pumps dont suck gas from the tank, they push whatever is supplied to them, so it is the 12mm hole from the gravity fed tank that is the bottle neck.

the pump mentioned above is unknown to me but it will also be comprimised by the volume of gas that it will be fed from the tank outlet, and will need a bigger hole as well. you could fit an in tank pump, wich will flow more gas per unit time to the primary pump than the 12mm hole, but imho, this is a much more difficult soultion.

fitting a walbro behind a 044 or any other combination on the standard 124 outlet will only allow an increase in pressure, trust me i did a lot of research on this, it wont be able to increase flow because the gas can only come out of the tank at the speed allowed by the 12mm hole.

12mm hole = 113mm^2.

you could fit 30 pumps, if the 12mm hole isnt increased in size, the flow wont be any more.

as i said above, and on a thread 2 years or more ago, for the bigger power outputs and increased volume required for e85, the feed from the tank needs opening up.

the instructions supplied with the da 37 (wich is a 360 lph pump) i had says it requires a mim 15mm inlet hole, it uses a 12mm outlet, but this is on the pressure side. it is reasonable to assume an 044 needs the same.

15mm hole = 177mm^2 wich is almost 50% more area than a 12mm hole, so without getting into flow dynamics and differentail losses, it is obvious that substantially more gas can come through it in the same unit time.


best fix is remove the bung from the tank and tap a 30mm hydralic fitting into it (area to allow gas to flow is then 707mm^2) and then run two pumps in parralel with associated lines, and you will never run out of gas

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ce 320 amg
widebody
tiwn turbo
Mutty 'der nail'
soon to be a six speed nail


"some mods improve your car and make it into something it never was, other mods, however, although essentially the same, are not, and make that car a ricer"

if your car isnt shiny, you dont know what you are talking about, remember; paint shine = knowledge. In order to be taken seriously, you should spend all your money on paint, (and get a dyno reading).
Dont forget to polish it often

Well switched over to e85 today. There is a little pump gas in the tank but took it up to 6200rpm and had enough fuel. This is with the base pressure regulator pressure. I will do some more tuning and get it wrapped out to see what is there. So far looks good.
Nick, I know what you are saying but I do not know that I have reached that point. My walbro may have just been getting weak also. The thing that I go back to is how small the walbro inlet is. And it does not matter if it is in the tank or under it has to draw the gas in, or the pressure from the gas tank has to push it in. The pressure from the weight of the fuel vs smallest fitting size. The walbro fitting is 12mm and by the time you have a fitting threaded in, it is smaller still. That always worried me but so many use it.
Anyways, so far it looks like I am going to be ok.

Going to try my higher pressure regulator. Got a new tank of fuel and it is just a tad bit lean and the injectors are maxed out. Hopefully I can squeeze out what I need with the higher fuel pressure. It was just dead dropping before so I know the fuel pump is working. Maybe still need larger injectors. I might try adding a little gas to the mix to see if I can squeeze some runs out on Wednesday if the higher pressure does not do the trick.

Well still a no go with higher pressure. Added some pump gas for a mix and went to the drag strip with my drag radials for the 1st time. The car was falling flat on its face on the launch. No wheel spin though. Do not think I have ever hit those parts of the fuel table before. Low rpm full throttle. Was going super rich. Also it was hot and I could not keep the i/c water cold from the long lines. So I was pulling timing bad on the back half. I think that I can get it all figured out for the next t/n/t. I was only running low 13.-- at 109 mph with a 2.25 60'. Worse 60' than I normally do on street tires with spin. Based on my mph gain on the back half though it should run the low 12.-- that I was running last year no problem. If I can get the launch dialed in it will go even better. I also had a full tank of gas so that did not help with the launch either. I might get injectors and get retuned before next time also. If not the E85 gas mix did fine.

Pardon me Folks: With a supercharger,can you sit at the line and build boost,like a turbo?

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

Well, heading back to the track tomorrow. Last time this year probably. Got a decent tune on a 50/50 mix of e85 and pump gas. Got the tune dialed at launch and I am removing the heat exchanger in front to just run ice in the intercooler. I logged last night that the heat exchanger is melting the ice faster. The weather will be cool. High of around 70. Hopefully i will get some results and not break anything. I just replaced the flex joints because they did not look to good. A little twist in them a few times. Will post back if anything good happens.

good luck dude, fingers crossed!

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Blue Ridge Mercedes
Jonathan Hodgman
http://www.blueridgemb.com/
Enthusiast Service, Restoration & Tuning.
Follow Us on Facebook!
Located in the Atlanta area
Specializing in all pre and post merger AMG's including Hammers and DOHC M117 engines.
Mercedes Repair Atlanta

Thanks,
By the way your car collection is getting out of hand.

I have serious problems...

there is no MA that I know of...;-)

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Blue Ridge Mercedes
Jonathan Hodgman
http://www.blueridgemb.com/
Enthusiast Service, Restoration & Tuning.
Follow Us on Facebook!
Located in the Atlanta area
Specializing in all pre and post merger AMG's including Hammers and DOHC M117 engines.
Mercedes Repair Atlanta