Damn these fuel pumps!!!!!
12-17-2014, 10:43 AM
#26
MBWorld Fanatic!
Fair enough. With yourr id1000s and e85, any tuning issues?
When I rip out my current pump baskets I will keep them so I can modify for larger pumps when I get to e85. You have no had fuel flow issues with the small supply lines?
When I rip out my current pump baskets I will keep them so I can modify for larger pumps when I get to e85. You have no had fuel flow issues with the small supply lines?
I was not speaking specifically about the E55 pump assembly, I was speaking generically about a returnless fuel system. In a returnless system the pumps are run on the pressure side with an exhaust relief only utilized for overpressure. I designed systems for both Ford and GM where this was the only method used across the company, engineering standard.
I can't speak for our assembly, as I don't have one in my hand, but it may be a deadhead system and not a true returnless system. Regardless, voltage is still variable in a deadhead system. In a true returnless system there is no fuel pressure regulator, whether internal or external to the tank, and voltage variability is indeed based on demand. This is why there are fuel rail pressure sensors used in returnless systems in conjunction with driver modules, for real time response.
I can't speak for our assembly, as I don't have one in my hand, but it may be a deadhead system and not a true returnless system. Regardless, voltage is still variable in a deadhead system. In a true returnless system there is no fuel pressure regulator, whether internal or external to the tank, and voltage variability is indeed based on demand. This is why there are fuel rail pressure sensors used in returnless systems in conjunction with driver modules, for real time response.
12-17-2014, 10:12 PM
#27
I have both units new sitting on my dining room table. I want to take some pics so people understand more of what is being spoken of if they have not held these units themselves.
The fuel filter inside the sender (which is also the pressure sensor AS well as the actual (what I believe) is the fpr in the bottom of the case)
As I add power and e85, I will be concerned over these two units.
The fuel filter inside the sender (which is also the pressure sensor AS well as the actual (what I believe) is the fpr in the bottom of the case)
As I add power and e85, I will be concerned over these two units.
BUT.. if BC928 could share his pictures with you of his "units" so that you might be able to confirm what type of fuel pressure relief the E55 has? Questions answered, Problems Solved, and Solutions can be found. hopefully, just a visual will be enough.
Last edited by 95ONE; 12-17-2014 at 11:48 PM.
12-18-2014, 12:10 AM
#29
Super Member
No supply issues aside from the connector overheating. This may or may not be related to a restrictive supply line, but I'm leaning toward not at all. I've run 6AN lines on 700whp cars with no issues, our system isn't too far off from that and we have the benefit of an unusually high base pressure.
SOOOO.. Then discussing either without the actual knowledge of exactly what our system is, is difficult and confusing for most.
BUT.. if BC928 could share his pictures with you of his "units" so that you might be able to confirm what type of fuel pressure relief the E55 has? Questions answered, Problems Solved, and Solutions can be found. hopefully, just a visual will be enough.
BUT.. if BC928 could share his pictures with you of his "units" so that you might be able to confirm what type of fuel pressure relief the E55 has? Questions answered, Problems Solved, and Solutions can be found. hopefully, just a visual will be enough.
12-20-2014, 03:24 PM
#30
MBWorld Fanatic!
There was a member here who did what I was thinking about doing.
He simply used JB weld and saturated the entire piece where it leaks and surrounding areas where it could leak. Just basically put a nice glob. He said it worked and solved the issue. I can't remember his user name.
Just seems like a such a waste to keep replacing the expensive pump assemblies. Instead of addressing the actually issue itself. Just my 2 cents.
He simply used JB weld and saturated the entire piece where it leaks and surrounding areas where it could leak. Just basically put a nice glob. He said it worked and solved the issue. I can't remember his user name.
Just seems like a such a waste to keep replacing the expensive pump assemblies. Instead of addressing the actually issue itself. Just my 2 cents.
12-20-2014, 07:53 PM
#32
MBWorld Fanatic!
The jb weld will stop it from cracking from the heat but it will fail eventually, the pumps create more heat from the current needed to move the fuel because the filter gets clogged dirty, the issue is the filter
