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#16
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Okay someone shoot me if I am off base with this thinking, let say the lift pump is bad. What parts can be taken out so the electric fuel pump will take its place for delivering fuel to the IP.
My thinking is, since the main purpose is to deliver fuel to the IP, why not just "gut it" so what it is aflow through and let the electric fuel pump do the delivering of the fuel to the IP.
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1984 300D, 1972 LT1 Corvette, 2014 Artic White 3LT/Z51 C7, 2013 650i Convertible BMW, 1994 Kawasaki Vulcan, 1992 Yamaha Seca II and 1996 Dodge Ram 2500. |
#17
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Quote:
The lift pump existing is an excellent well though out very reliable design and easy to recondition to get it back to what it should be if it is deficient. Some cars using wvo seem to require a booster pump at the tank end of the system. If you are regularily using wvo does add some varience to the issue by the way. |
#18
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Quote:
(Which is not to say that I recommend the electric pump.) |
#19
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Quote:
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1984 300D, 1972 LT1 Corvette, 2014 Artic White 3LT/Z51 C7, 2013 650i Convertible BMW, 1994 Kawasaki Vulcan, 1992 Yamaha Seca II and 1996 Dodge Ram 2500. |
#20
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Quote:
Indeed just run a pump between supply and the input to the IP I think in the long term you should remove the mechanical pump and blank the hole on the IP because I'm not sure how much the mechanical pump relies upon diesel to lubricate it - having the mechanical pump seizing on the side of the IP probably won't be ideal...
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! |
#21
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Answer
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Residual fuel in the pump is enough to lubricate the plunger floating no load. .
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#22
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Do you have a rough drawing as an example? Thank you!
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1984 300D, 1972 LT1 Corvette, 2014 Artic White 3LT/Z51 C7, 2013 650i Convertible BMW, 1994 Kawasaki Vulcan, 1992 Yamaha Seca II and 1996 Dodge Ram 2500. |
#23
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I think he meant looping a hose between the input and output ports. The residual fuel/diesel will be pumped around the pump and lubricate it. May be add a little bit of fuel to the hose if necessary.
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Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed. W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html 1 X 2006 CDI 1 x 87 300SDL 1 x 87 300D 1 x 87 300TDT wagon 1 x 83 300D 1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry. |
#24
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Right on this!
Quote:
Using an electric pump set up to "overfuel" the system, in that pump up the max load input pressure to say 30psi, is something that may be beneficial. There are threads on the forum with that discussion.
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Current fleet 2006 E320 CDI 1992 300D - 5speed manual swapped former members 1984 300D "Blues Mobile" 1978 300CD "El Toro" |
#25
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Yes
Quote:
.
__________________
ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#26
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My sincere apologies for dragging this on, but I want make sure I have the right deal for this "looping" techniques. Hopefully I've illustrateded it correctly in the attached photo, the only thing difference is the prime on my lift pump is on the outboard side vice the inboard side due to mine is an older version. If I am on the right track here, I will focus on this MOD tomorrow. Thank you for veryone's patient. Because ever since I've intalled this electric fuel pump the car runs smooth, accel better and starts faster.
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1984 300D, 1972 LT1 Corvette, 2014 Artic White 3LT/Z51 C7, 2013 650i Convertible BMW, 1994 Kawasaki Vulcan, 1992 Yamaha Seca II and 1996 Dodge Ram 2500. |
#27
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Why waste horsepower driving a pump that does nothing useful? Remove the pump, fabricate a cover plate and be done with it.
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#28
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Answer
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It looks correct, but the text box covers what I need to see. .
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#29
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Answer
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Many don't have the extra money to have the plate made. A looped hose is cheap. There is NO horsepower gain on a stock injection pump. .
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#30
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The laws of physics suggest otherwise. The gain might not be of any great consequence, but it isn't zero.
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