Which Walbro pump for C32?
#1
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2002 C32 AMG, 2013 GLK 350/4, 2015 E63S AMG Wagon
Which Walbro pump for C32?
Which Walbro pump fits the best in place of the OEM? I see that for the 255 LPH version there are multiple models, GSS340, GSS341 and GSS342. Need to add some fuel.
#2
Lenin,,, You may remember me from the e55 fuel pump issue thread in my c32. well.... e55 pump doesnt EVEN fit so i went with an aeromotive stealth 340lph. it fits great!! i was going to do a diy to show people the install. I just installed it last night and it runs great. Its quiet and it's built to be used with pulse width modulated cars like ours. Walbro's really arnt that reliable imo with other vehicles ive modified.
http://www.sparktecmotorsports.com/a...id=20861070197
http://www.sparktecmotorsports.com/a...id=20861070197
#5
It is normal 400LPH, not E85 model. But if you put that, you may need some modding in fuel lines(and electricity), flow is too high for stock lines and wiring is too thin.
255LPH works just fine with stock lines, plug and play.
255LPH works just fine with stock lines, plug and play.
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Lenin,,, You may remember me from the e55 fuel pump issue thread in my c32. well.... e55 pump doesnt EVEN fit so i went with an aeromotive stealth 340lph. it fits great!! i was going to do a diy to show people the install. I just installed it last night and it runs great. Its quiet and it's built to be used with pulse width modulated cars like ours. Walbro's really arnt that reliable imo with other vehicles ive modified.
http://www.sparktecmotorsports.com/a...id=20861070197
http://www.sparktecmotorsports.com/a...id=20861070197
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#7
Lenin I don't think you would be disappointed with aeromotive. Just the quality of the pump itself is worth the 50 extra dollars. I had a walbro in a sc400 with a 2jzgtte. It worke d as well. It just looks mass manufactured and cheap to me. Probably just the difference in the packing and instructions that gave me the warm fuzzy on the aeromotive
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Lenin I don't think you would be disappointed with aeromotive. Just the quality of the pump itself is worth the 50 extra dollars. I had a walbro in a sc400 with a 2jzgtte. It worke d as well. It just looks mass manufactured and cheap to me. Probably just the difference in the packing and instructions that gave me the warm fuzzy on the aeromotive
#9
And the thought was to try to use E85 on some point..
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I'm putting it right where the OEM pump is. inside the tank. No need to change anything. BTW, I decided to go with the Walbro GSS340 for now. Both Walbro 400 and Aeromotive 340 would require upgrading the wiring to 10GA wire and I don't feel like doing it now.
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Our injectors use pulse width modulation and are controlled by the ECU. Not sure how, if at all, the fuel pump plays a role in driving or determining the pulse width.
Regarding the return line, as Pansu indicated, there is a return line (hard blue line) going back from the filter to the sending unit that is on the driver side in the fuel tank.
The question for Pansu or anyone else is: what is the best way to connect an AEM fuel pressure regulator and a looped fuel rail? Should I run a separate return line from the regulator to the tank? Should I get a check valve? Bypass OEM filter? Just don't feel like experimenting with the fuel system.
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#15
I have AEM regulator(after rail) in enginen bay and i have looped rail. Original filter i replaced with "no regulator" filter. And i have new return line, AEM to fueltank. In not sure if that is the best way, but that i have ![Big Grin](https://mbworld.org/forums/images/smilies/biggrin.gif)
Sorry my bad english, hope you understand something
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Sorry my bad english, hope you understand something
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#16
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I have AEM regulator(after rail) in enginen bay and i have looped rail. Original filter i replaced with "no regulator" filter. And i have new return line, AEM to fueltank. In not sure if that is the best way, but that i have ![Big Grin](https://mbworld.org/forums/images/smilies/biggrin.gif)
Sorry my bad english, hope you understand something![Embarrassment](https://mbworld.org/forums/images/smilies/redface.gif)
![Big Grin](https://mbworld.org/forums/images/smilies/biggrin.gif)
Sorry my bad english, hope you understand something
![Embarrassment](https://mbworld.org/forums/images/smilies/redface.gif)
#17
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I'm changing to a filter without the regulator and since I'll be installing an AEM FPR after the fuel rail, I feel that I need to go with the check valve after the fuel filter. Already started purchasing parts. Should be done with the pump install on Monday. The rest will be installed later after I figure out what I want to do with the fuel line and the rail.
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I need a recommendation on how to secure the new Walbro pump in the old basket. The old pump had a lip on it to which the top of the basket is attached. The new Walbro pump is thinner and shorter. I can get a foam sleeve but am interested in knowing what others had done. Also, any need to replace the feeder pump to match the new Walbro or will it keep up?
#20
Hey mate, I just ordered new pierburg pumps from rexbo yesterday. Figured I might as well do both... The feeder pump is cheap compared to the main.
https://mbworld.org/forums/showthread.php?t=543433
https://mbworld.org/forums/showthread.php?t=543433
#21
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Hey mate, I just ordered new pierburg pumps from rexbo yesterday. Figured I might as well do both... The feeder pump is cheap compared to the main.
https://mbworld.org/forums/c32-amg-c55-amg-w203/543433-definitive-fuel-pump-numbers.html
https://mbworld.org/forums/c32-amg-c55-amg-w203/543433-definitive-fuel-pump-numbers.html
#22
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The installation is complete. The car runs. That's always a good thing after swapping essential components like the fuel pump. Additional good news is that the fuel pressure is up to 65 PSI from 56 PSI. Need to do more testing under WOT but so far the Walbro 255 pump is doing what I thought it would do. Next step is 8AN fuel line and AEM FPR.
#23
The installation is complete. The car runs. That's always a good thing after swapping essential components like the fuel pump. Additional good news is that the fuel pressure is up to 65 PSI from 56 PSI. Need to do more testing under WOT but so far the Walbro 255 pump is doing what I thought it would do. Next step is 8AN fuel line and AEM FPR.
#24
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I'm already running stacked. My issue was running a little bit leaner than is safe at WOT at higher RMPs, so I just refrained from running the car hard. I need to update my sig. It still says 181mm pulley. I'm leaving the country for a few weeks. When I come back I will finish my testing and complete the install of larger fuel line and the FPR. The fuel rail has already been completed. Same as boostmonkey's with 8AN in but with only 6AN for the loop.