jcjmw

There has to be some members that upgraded our oem dual fuel pumps.....right? If you have, can you chime in and share the info?

Forrest Gump 9

You can take the fuel pumps (passenger side) out and upgrade to the 320lph pumps. This mods is courtesy of Craig .

cij911

Why not just run a large Weldon or the like , coupled with a larger feed line, connected to a looped rail and a return line ??

Sir-Boost-a-Lot

iTrader: (1)

Because it sounds like a 1" drive electric drill running at full speed under your car

cij911

^^ I would think if noise was a concern, one could put the pump in a sound deadened enclosure....Then again, anyone that needs this mod probably does not care about NVH...

jcjmw

I appreciate the response but the idea is not realistic. The idea sounds easy but its not doable without major work and other mods. I am looking for a drop in higher pressure fuel pump. Somebody has to have done this...I am assuming.

cm60k

I heard that the R230 SL55/63/65, uses a high power pump, not sure if someone install it,

cause its an external not internal pump....!?!

ZAYED,,

chawkins2001

I went with dual 340lph aeromotive pumps.

cij911

The only hard part would be the return line routing (and that is not hard).

If you just want more pressure and flow, you could just add an external pump and use the stock pumps as primer pumps, as long as they still work.

Or you could remove the stock pumps entirely and use an external pump.

There are a few safety precautions that you would want to take, but it should be fairly easy.

That said if two 340lph pumps can be fitted easily, then that seems like a great route too - especially if you can use easy to change filters vs. the OEM crap.

Craig - would you please post more information on the pumps you are using, mounting, and filtration ? There are two aeromotive 340 lph models, one with a center inlet and one with offset.

Exotic-metal55

I use duel bosch 44 external pumps and 8an line that feeds into duel 6an linesgoing to each rail side. One stock intank pump feeds the duel bosch 44 and they are fitted to a fuel manifold to eliminate surge starvation.

With our aluminum frames, you have to really insulate all pumps and make sure nothing that vibrates can touch the frame or it will sound like your in the pump station at the hoover dam.

jcjmw

Is it drop in, plug it and thats it or was there more to it?

chawkins2001

It was part number 11140 aeromotive fuel pump. Pretty much plug and play from what I remember.

jcjmw

Thanks for th info.

thunderclaps

Has anyone replced the driver side fuel pump? I already fool the tank's pressure system with a map(2.3v) sensor wired to it. I would be nice to install 3 walbro's 420. I am actually working on it.

Denroll

I'm moving to your neighborhoodn soon... Well, close enough. Sierra Vista.

thunderclaps

Good, 45 minutes away. Hit me up, we can do cars and coffe, euro meet track etc. You will end up driving to Tucson for 90% of the car events anyway.

groove66

drivers side is the sender not the pumps... I just did it the other day. I am surprised that nobody has went to a 1/2 aluminum fuel line from the tank to the front of the car.

and after looking at the sender it has 4 lines coming off it in the tank. 2 lines from the pumps that go into a "Y". A return line ,which is every bit of 1/2" and a 4th which i am not sure of it function.

It seems if you were to get some submersible fuel lines you can make the fuel lines coming off the pump and into the "y" a little larger diameter.

thunderclaps

The driver side sender unit has a fuel pump, a fuel pressure regulator, a fuel vapor pressure sensor and a filter. The 4th line is the pressure relive. I am trying to figure out if the fuel pressure is constant or variable by psi like my turbo cars. Adding a return line and an external fpr would make the drop in pumps very effective.

jcjmw

It looks like Chawkins has the answer? I pm BIP to see if they know or maybe offer a plug and play upgraded fuel pump.

thunderclaps

Cool keep us posted. The passenger side pumps are pretty simple. Aeromotive or walbros should fit.

groove66

so there is 3 pumps? the power plug on the driver side plug is 2 small 18gauge wires and is for the level sensor..3rd wire is for ground. and the 2nd plug the pressure sensor.. the pass side has the main power for the fuel pumps and the wires go directly to the pumps and is some 10guage wire. I was thinking the 4th hose on the sender is the tank level equalizer cause of the hump in the tank.

The drivers side does have a fuel pressure regulator



so there is a fuel pump inside. here is one taken apart. it looks more like just a filter..

thunderclaps

There's a 3rd pump. Those pics are probably from an e500. My harness has more wires attached.

groove66

nope e55. I work on these cars on a daily. And I just did one on my car on monday..I am very familiar with the setup..

here is a thread
https://mbworld.org/forums/w211-amg/...ation-diy.html

thunderclaps

That's even better. I was looking at a diagram that shows a 3rd pump. If it has just 2 we can do a y and an fitting outlet. With external filter.

jcjmw

The pic in post 48 is very interesting. It shows the 2 pumps. It lools, looks like you can upgrade it with a higher flow pump, a plug and play.