Jump to content
HybridZ

Search the Community

Showing results for tags 'fuel delivery'.



More search options

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Categories

There are no results to display.

Forums

  • Technical
    • FAQs
    • Model Specific
    • V8 Z Forums
    • 6 Cylinder Z Forums
    • Other Engines
    • Engine Components
    • Body Kits & Paint
    • Windtunnel Test Results and Analysis
    • Brakes, Wheels, Suspension and Chassis
    • Drivetrain
    • Fabrication / Welding
    • Interior
    • Miscellaneous Tech
    • Trouble Shooting / General Engine
  • General
    • Announcements
    • Non Tech Board
    • New Members Forum
    • Members Projects
    • Motorsports / Events
    • Buy / Sell / Trade
    • Group Buys
    • Vendor's Forum
    • Links
    • Site Support
    • Area 51
    • The Tool Shed

Blogs

  • Blog 7794
  • Blog 7796
  • Blog 7797
  • Blog 7801
  • Blog 7810
  • Blog 7821
  • Blog 7850
  • Blog 7876
  • Blog 7900
  • Blog 7903
  • Blog 7918
  • Blog 7945
  • Blog 7995
  • Blog 8097
  • Blog 8113
  • Blog 8124
  • Blog 8199
  • Blog 8217
  • Blog 8223
  • Blog 8239
  • Blog 8335
  • Blog 8424
  • Blog 8478
  • Blog 8501
  • Blog 8644
  • Blog 8751
  • Blog 8853
  • Blog 9074
  • Blog 9088
  • Blog 9095
  • Blog 9152
  • Blog 10389
  • Blog 10579
  • Blog 10681
  • Blog 10929
  • Blog 10956
  • Blog 11195
  • Blog 11737
  • Blog 11794
  • Blog 11853
  • Blog 12120
  • Blog 12435
  • Blog 12884
  • Blog 13129
  • Blog 13159
  • Blog 13200
  • Blog 13472
  • Blog 13567
  • Blog 13587
  • Blog 14207
  • Blog 14439
  • Blog 14625
  • Blog 14703
  • Blog 14909
  • Blog 14919
  • Blog 14975
  • Head Gasket for 3.1 liter stroker engine
  • Blog 15298
  • Blog 15393
  • Blog 15520
  • Blog 15602
  • Blog 15654
  • Blog 15717
  • Blog 15865
  • Blog 16224
  • Blog 16227
  • Blog 16485
  • Blog 16662
  • Blog 16809
  • Blog 16878
  • Blog 16923
  • Blog 17059
  • Blog 17103
  • Blog 17116
  • Blog 17333
  • Blog 17402
  • Blog 17506
  • Blog 18026
  • Blog 18084
  • Blog 18466
  • Blog 18819
  • Blog 19188
  • Blog 19475
  • Blog 19671
  • Blog 19685
  • Blog 20165
  • Blog 20200
  • Blog 20239
  • Blog 20330
  • Blog 20345
  • Blog 20475
  • Blog 20568
  • Blog 20611
  • Blog 20767
  • Blog 20885
  • Blog 21113
  • Blog 21316
  • Blog 21355
  • Blog 21400
  • Blog 21541
  • Blog 21630
  • Blog 21672
  • Blog 21712
  • Blog 21925
  • Blog 21950
  • Blog 22036
  • Blog 22272
  • Blog 22312
  • Blog 22331
  • Blog 23034
  • Blog 23042
  • Blog 23220
  • Blog 23246
  • Blog 23322
  • Blog 23406
  • Blog 23570
  • Blog 23700
  • Blog 23718
  • Blog 23737
  • Blog 23762
  • Blog 23794
  • Blog 23917
  • Blog 23956
  • Blog 23959
  • Blog 24064
  • Blog 24131
  • Blog 24139
  • Blog 24205
  • Blog 24221
  • Blog 24240
  • Blog 24430
  • Blog 24435
  • Blog 24495
  • Blog 24576
  • Blog 24643
  • Blog 24722
  • Blog 24770
  • Blog 24833
  • Blog 24848
  • Blog 24853
  • Blog 24872
  • Blog 25030
  • Blog 25248
  • Blog 25289
  • Blog 25373
  • Blog 25396
  • Blog 25527
  • Blog 25674
  • Blog 25853
  • Blog 25886
  • Blog 25922
  • Blog 25986
  • Blog 26129
  • Blog 26181
  • Blog 26217
  • Blog 26240
  • Blog 26247
  • Blog 26299
  • Blog 26401
  • Blog 26440
  • Blog 26559
  • Blog 26735
  • Blog 26736
  • Blog 26831
  • Blog 26844
  • Blog 26883
  • Blog 26884
  • Blog 27002
  • Blog 27028
  • Blog 27169
  • Blog 27260
  • Blog 27267
  • Blog 27307
  • Blog 27345
  • Blog 27400
  • Blog 27428
  • Blog 27452
  • Blog 27558
  • Blog 27622
  • Blog 27707
  • Blog 27735
  • Blog 27877
  • Blog 28049
  • Blog 28070
  • Blog 28199
  • Blog 28214
  • Blog 28234
  • Blog 28308
  • Blog 28320
  • Blog 28475
  • Blog 28476
  • Blog 28494
  • Blog 28657
  • Blog 28671
  • Blog 28814
  • Blog 28880
  • Blog 28923
  • Blog 28943
  • Blog 28945
  • Blog 28982
  • Blog 28993
  • Blog 29008
  • Blog 29036
  • Blog 29168
  • Blog 29412
  • Blog 29467
  • Blog 29618
  • Blog 29710
  • Blog 29759
  • Blog 29832
  • Blog 29868
  • Blog 29922
  • Blog 29950
  • Blog 30009
  • Blog 30027
  • Blog 30175
  • Blog 30182
  • Blog 30287
  • Blog 30302
  • Blog 30339
  • Blog 30443
  • Blog 30461
  • Blog 30474
  • Blog 30517
  • Blog 30556
  • Blog 30654
  • Blog 30729
  • Blog 30758
  • Blog 30773
  • Blog 30842
  • Blog 30872
  • Blog 30886
  • Blog 30989
  • Blog 31027
  • Blog 31048
  • Blog 31073
  • Blog 31109
  • Blog 31116
  • Blog 31138
  • Blog 31251
  • Blog 31307
  • Blog 31343
  • Blog 31378
  • Blog 31393
  • Blog 31432
  • Blog 31495
  • Blog 31507
  • Blog 31592
  • Blog 31626
  • Blog 31643
  • Blog 31692
  • Blog 31717
  • Blog 31760
  • Blog 31768
  • Blog 31777
  • Blog 31826
  • Blog 31851
  • Blog 31877
  • Blog 31907
  • Blog 31942
  • Blog 32009
  • Blog 32051
  • Blog 32073
  • Blog 32094
  • Blog 32111
  • Blog 32142
  • Blog 32169
  • Blog 32198
  • Blog 32250
  • Blog 32256
  • Blog 32259
  • Blog 32262
  • Blog 32291
  • Blog 32371
  • Blog 32417
  • Blog 32463
  • Blog 32515
  • Blog 32519
  • Blog 32562
  • Blog 32678
  • Blog 32695
  • Blog 32725
  • Blog 32981
  • Blog 33294
  • Blog 33517
  • Blog 33612
  • Blog 33734
  • Blog 33993
  • Blog 34018
  • Blog 34140
  • Blog 34452
  • Blog 34586
  • Blog 34855
  • Blog 35117
  • Blog 35378
  • Blog 35742
  • Blog 35956
  • Blog 36022
  • Blog 36030
  • Blog 36711
  • Blog 36997
  • Blog 37069
  • Blog 37070
  • Blog 37103
  • Blog 37166
  • Blog 37257
  • Blog 37645
  • Blog 37818
  • Blog 37954
  • Blog 38369
  • Blog 38569
  • Blog 38681
  • Blog 38923
  • Blog 38945
  • Blog 39122
  • Blog 39441
  • Blog 39494
  • Blog 39529
  • Blog 39575
  • PSL_240z's Blog
  • Phlebmaster's Blog
  • dhp123166's Blog
  • miguel240zcruz's Blog
  • dsalni's Blog
  • dsalni's Blog
  • beon's Blog

Calendars

  • Community Calendar

Categories

  • Configuration File Sharing
  • Drawing Files, Templates
  • Manuals, Diagrams, Guides
  • Software, Calculators
  • Other misc files

Categories

  • Z Videos
  • Member Videos
  • Road Racing & Autocross
  • Drag Racing
  • Burnouts and Drifting
  • Crash and Burn
  • Dyno Runs
  • Events
  • Babes
  • Humor
  • Miscellaneous

Found 6 results

  1. After kicking around many ideas I decided to go with an external surge tank and external pumps to feed the fuel rail of my rb25det in my 240z. I tried an intank fuel pump previously. The intank pump is the way to go for sure as long as you have adequate baffling and good general design. My problem stemmed from a poor design and using a rusty tank a buddy gave me. I started a thread on that. http://forums.hybridz.org/topic/94261-bonks-efi-fuel-tank/ I will update that thread with some lessons learned soon. Luckily I still had the original tank I pulled out of the car at the start of my project. It had a little rust, the local radiator shop was able to clean it out using acid and hot tanked it ($89). The key to my project is that there are no modifications to the stock tank. I chose to use the bcbroncos product, Accumulator Tank, ( http://www.bcbroncos.com/fuelefi.html ) scroll to the bottom the page. The tank is a converted remote oil filter. The guys at bcbroncos use this tank for their EFI conversions (if the customer does not want to spring for the intank solution). Fuel goes in the top, pass through the filter, there is a pickup tube that extends to the bottom of the filter where the fuel is picked up by the HP pump. bcbroncos added a third fitting (5/16ths) to the top of the modified oil filter to manage the return system (see tee fitting in website image). You plumb the return from the engine to one side of the tee and the return to the tank to the other side. I am feeding the surge tank with a low pressure Airtex 8016S pump. On the engine side of the surge tank is a high pressure Walbro GSL392 pump. The obvious problems with this kind of are the following: 1) Mounting everything (there aint much room) while staying away from the exhaust and the suspension and anything else that moves (rips). 2) Return Pressure Part A - there must be free flow from the fuel pressure regulator (FPR) to the tank. If the system lacks enough return capacity (adequate fuel line inside diameter), pressure can build up in the surge tank. In this case that is not an option because the tank is nothing more than a thread on filter. People have reported problems with their bcbroncos accumulator tanks leaking. I suspect that is because they did not have adequate return capacity to the tank and pressure built up inside the surge tank. 3) Return Pressure Part B* - if there is not free flow after the FPR then the HP pump has to work under load and will get HOT! = BAD for pump and WIRE! If the HP pump is working hard and getting hot then the WIRE feeding it juice is getting HOT. 4) Noise of external pumps (live with it) * - source Tony D. 1) After looking around the back of the car for a while I found a cluster of three threaded holes. I made a plate (1/8-inch) and threaded M6 hardware into the holes. I use the plate as a base to weld an extension out of some small box tubing. This was needed to move everything away from the Mustache Bar. I welded another plate to the box tubing, drilled to accept the surge tank and pump mounting plate (16-gage sheet metal). 2) After exchanging emails with Tony D, I was convinced that I needed to increase my return capacity to the tank. I already replaced the little pinner 3/16ths return line with 5/16ths when the drivetrain was out. But the stock tank has that 3/16ths return above the 5/16ths pickup. I decided to swap my usage of the 3/16ths return line with the smaller top of tank vent line (@ 5/16ths or a little bigger. At this point you simply need to make a 3 to 5/16ths adapter to plump the stock return to the vent tank. 3) After doing some research on the amp draw of the pumps and exchanging emails with Yury at Wiringspecialties.com we decided that I would be OK running both pumps over the stock 10-guage wire that runs from the back of the car near the tank (Nissan ran it back there to allow for an optional electric fuel pump on the carburated cars) to the front (Green wire). I am monitoring the wire (grabbing it to see if it gets hot) as I've running the cat over the last few weeks and have felt to heat at all. The Walbro has never gotten hot at all. The LP pump gets warmish, but not hot. 4) The Airtex pump makes a lot of noise (grumble) at idle. Can't hear it when you are underway. It doesn't bother me. Priming the system, I disconnected the power and ground to the Walbro and cycled the car in the ON position running the LP pump. I waited until I heard gas falling from the vent fitting back into the tank. I connected the HP pump back up and went for it. Damn thing started right up. Crazy. The Bad/weird part. When I shut the car off the LP pump continues to run for a second or two. I have a an inline fuel pressure gage in the engine bay. After I turn the car off it reads @ 25 psi pre-rail. After 20 minutes or so the pressure bleeds off. I am concerned this may not be good for the FPR. BUT the remnant pressure is great for one thing, starting the car back up. When I had my intank setup. I had to prime the system in the ON position everytime I started the car. Now, no need, the fires right up on the the first crank everytime. Thanks for reading. Bonk
  2. Hello, We have a new/old Chump Car that we've got almost ready. In testing last week at Homestead Motor Speedway, we found the engine would stall because of fuel pressure or lack thereof, in left hand turns. My track fix was to pour more fuel in it. It would run normally with 16 gallons in it, but after 5-10 laps the problem would reoccur. The track runs counter clockwise so this is quite a problem. Essentially, we are able to use about 3 gallons of fuel if we're filled up. We have an SU Carb set up with a 1978 fuel tank, running the return system for the fuel to return to the tank. We were able to get fuel pressure and run the new engine in the garage with only 3 gallons in the tank, so I feel we at least have the pick up plumbed properly. I have run many street cars on the race track and never had this problem. Any ideas for me to check? Thanks, greg ira
  3. Hi all, been really working hard on my Z and want to remove the stock return and fuel lines for my stroker/mikuni setup. I haven't been able to find any information on the right way to go about doing this and was hoping for some recommendations for someone who's done it before. Thanks for your help. Chris
  4. trying to replace all fuel hoses and get the gas smell outta my garage. some help please =)
  5. Fuel Pump problems

    I have been experiencing a problem with my fuel pump running. I put in a Nistune type 1 board into the ecu to tune my car, got it to run, but the fuel pump would cut out after running for about 30 seconds. It would prime the rail, but there would be no more fuel after running for 30 seconds. I replaced the fuel pump with a walbro 255lph, hoping it would fix the problem. Turned the key and the pump primed the fuel rail, good sign. But it ended up doing the exact same thing as the old pump. I took a look at the relays then and replaced both of the relays, still hasn't changed a thing. The Nistune software is giving a code in the consult gauge saying something like "ECU Fuel Pump circuit". I do remember when I moved into my new place I heard the fuel pump priming, but the keys were in my hands and the car was off. The objects in my trunk space were pressing on the wire connection from the fuel pump to the wires that lead to the ECU or relays (don't exactly know which). When I cleared the space I pressed down on the connector and was able to prime the fuel rail, haven't been able to do it since. Anyways, where should I start looking for wire problems? How do I find them?
  6. Hello I'm pretty new to the forums, having a couple problems with my Z I just purchased a couple weeks back. the first problem seems to be transmission or clutch related- 5 speed it makes a weird noise like two metal plates scratching together intermittently in 1st through 3rd gear at low speeds it also makes a weird metallic noise sometimes when switching gears from the shifter. I'm thinking that it is possible it may be low transmission oil/fluid or something similar anybody have any ideas what this could be? the second problem just started within the last two days and maybe fuel related or related to the first problem where the gear may be slipping when accelerating the throttle response is acting strangely don't know how to explain it exactly except that it's basically not there unless you get on it. doesn't look like I'm leaking fuel anywhere, but I did start getting a strong fuel/exhaust smell today my eyes even starting watering on the way home from work today. the previous owner told me the car had an exhaust leak in between the downpipe and the catalytic converter could this be the problem? any help would be appreciated greatly thanks
×