bondango Posted June 22, 2006 Share Posted June 22, 2006 There were never any Walbro copies on ebay AFAIK. RACING 255lph Fuel Pumps Include: GSS341 / GSS342 In Tank Fuel Pump Wiring Harness Adapter Fuel Tank Filter Went for £45 + p&p would'nt trust it to drain the bath though Link to comment Share on other sites More sharing options...
GeordieSteve Posted June 23, 2006 Author Share Posted June 23, 2006 Cheers for clearing that up Link to comment Share on other sites More sharing options...
Guest Usmann A Posted June 23, 2006 Share Posted June 23, 2006 LOVL. http://www.aeromotiveinc.com/pdf/13110.pdf a read of what the people that make the products say, which as youll note is the same as my setup. ps, note how the FPR is located after the injectors yet also before. If i had a schematic of how a FPR worked, o how it would be fun. WIth my job being to deisgn A/C systems i have an idea of how pressures and massflow rates operate through a tube. give me a bit of time and i wll do a annotated drawing of my system, with a small explanation for those who dont understand the basics or layout of a simple fuel system. A bit of time though, its been over 2 years since i fitted it. hth Link to comment Share on other sites More sharing options...
bondango Posted June 23, 2006 Share Posted June 23, 2006 LOVL. http://www.aeromotiveinc.com/pdf/13110.pdf a read of what the people that make the products say, which as youll note is the same as my setup. ps, note how the FPR is located after the injectors yet also before. If i had a schematic of how a FPR worked, o how it would be fun. WIth my job being to deisgn A/C systems i have an idea of how pressures and massflow rates operate through a tube. give me a bit of time and i wll do a annotated drawing of my system, with a small explanation for those who dont understand the basics or layout of a simple fuel system. A bit of time though, its been over 2 years since i fitted it. hth No need for a diagram, your using a closed loop on the rail, you did'nt state that in your description you just said the FPR was placed before the rail - amazing how a little clarity makes things easier Link to comment Share on other sites More sharing options...
Guest Usmann A Posted June 23, 2006 Share Posted June 23, 2006 ah, different terminolaogy, because in reailty I have got it before and after the rail. Think about the direction of flow and how the internals of the Aermotive FPR are shaped. Il let you supra tuners ponder on that one. muhahah Link to comment Share on other sites More sharing options...
Guest Usmann A Posted June 23, 2006 Share Posted June 23, 2006 thank god, i didnt start the diagram. LOL Link to comment Share on other sites More sharing options...
bondango Posted June 23, 2006 Share Posted June 23, 2006 thank god, i didnt start the diagram. LOL See the Diagram in the Aeromotive PDF, well thats how everyone does theres , except we call that placing the FPR at the end of the rail lol, not before it (though it looks like its before it) Tank--Pump----filter------rail----FPR---return (FPR is placed at the end of the system) so we say at end of rail, as system starts at tank and works way forward. Link to comment Share on other sites More sharing options...
Guest Usmann A Posted June 23, 2006 Share Posted June 23, 2006 LOL. I still let you ponder on that one. they are two ways to look at it on my system, thing is though you ahve remeber its an open system,there is no pressure difference between each side of the rail. One pressure, so the regulator can be placed infact anywhere on the way to, or after the fuel rail. It will still regulate the system pressure. So infact i was correct in saying my FPR is before and after my rail. its a simple fact of understanding that the FPR is BEFORE/AFTER the rails, its one pressure. Remember there is no difference if you take it from the middle of the rail, or the side, its one pressure, thus that regulator will regualte the whole fuel system pressure, the lines, etc. HTH Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 23, 2006 Share Posted June 23, 2006 In the Aeromotive PDF file the reg is still placed after the rail(s) All FPR's control the pressure before the valve, as that's the only way they CAN control pressure as they are a simple spring gate valve. If it's in the feed line from the pump, and BEFORE the rail the only pressure will be any flow restiction in the return line. Link to comment Share on other sites More sharing options...
Guest Usmann A Posted June 23, 2006 Share Posted June 23, 2006 ok, when you mean before chris, they is no directional flow across the regualtor, so that means it just senseing system pressure, the only directional arrow is the outlet, which is the bottom, the rest of the -10 ports are for fuel in/out supply. Link to comment Share on other sites More sharing options...
Guest Usmann A Posted June 23, 2006 Share Posted June 23, 2006 diagram, its a thousand words, hopefully you guys can see where im coming from. Link to comment Share on other sites More sharing options...
Guest Usmann A Posted June 23, 2006 Share Posted June 23, 2006 shoot, anyone know how to convert bitmap to jpeg? Link to comment Share on other sites More sharing options...
Kopite Posted June 23, 2006 Share Posted June 23, 2006 Nope but could do a screen grab and paste into paint and then save as a jpeg? Link to comment Share on other sites More sharing options...
Guest Usmann A Posted June 23, 2006 Share Posted June 23, 2006 your a star Koptie. Link to comment Share on other sites More sharing options...
Matt Harwood Posted June 23, 2006 Share Posted June 23, 2006 I'm certainly no expert on fuel flow, but that looks like a really strange way to do it. Is there a technical reason why? Link to comment Share on other sites More sharing options...
b_have Posted June 23, 2006 Share Posted June 23, 2006 your a star Koptie. Some backpeddling here Looks like your second pump is feeding the fpr? Usmann, your showing a flow (presumed) arrow away from the fpr, how does that work then? Link to comment Share on other sites More sharing options...
Guest Usmann A Posted June 23, 2006 Share Posted June 23, 2006 LOL,- no backpeddleing here bud. just straight facts put into practice.and it works. BTW, its also how BL fuel system routing instructions come too. No offence but i know its correct, a diff way, but correct, and it works. So not much more to be said on the subject really. I think i covered it in my last few posts. Link to comment Share on other sites More sharing options...
TLicense Posted June 24, 2006 Share Posted June 24, 2006 I don't see how the pump flowing to the FPR can be contributing to the flow through the rail, as it's pumping in the opposite direction?? Surely the pump going to the rail is the only pump supplying fuel to the rail and the second pump is effectively pumping straight back into the tank? The hose in the diagram between the rail and the pressure regulator, which way is the fuel flowing through that? If it's towards the regulator, then the second pump isn't really contributing any flow. If it's going the other way, then the pump going directly to the rail isn't contributing? Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 25, 2006 Share Posted June 25, 2006 Two arrows pointing in opposite directions?? Bizarre flow chart, very, very bizarre in fact. What's the word I'm looking for? Err, wrong! Link to comment Share on other sites More sharing options...
bondango Posted June 25, 2006 Share Posted June 25, 2006 Just noticed that diagram now!!! so my theory that the fuel pressure was there due to the orfice size on the return port on the rail goes straight out the window - he dont use one in the rail!! the only pressure i can see there with that diagram is that of the fuel flow from each pump acting upon each other when the meet in the rail??? i take it thats when the arrows meet each other....... Think il stick to my well used and trusted method of setting up fuel systems Link to comment Share on other sites More sharing options...
TLicense Posted June 25, 2006 Share Posted June 25, 2006 Two arrows pointing in opposite directions?? Bizarre flow chart, very, very bizarre in fact. What's the word I'm looking for? Err, wrong! lol, subtle Chris, subtle. Link to comment Share on other sites More sharing options...
Guest Usmann A Posted June 25, 2006 Share Posted June 25, 2006 LOL. thanks for you opinions guys. all noted.looks like no ones actually read my post on system pressure. Dont know if you remember the early toyotas use to have the FPR in the tanks next to the pumps. Not totally suitable for this application of performance but similar principle. ps, Ill let the car do the talking. have fun. Link to comment Share on other sites More sharing options...
TLicense Posted June 25, 2006 Share Posted June 25, 2006 Sorry mate, but it's just wrong. You may have pressure agreed, but the flow, which at the end of the day is the important bit, is only being supplied by one pump. I read your post on pressure. So the system is just at one pressure. Fine, I can see how that is true. But how's the 2nd pump contributing to the fuel flow? It's not, infact if anything it's hindering it, by pumping in the opposite direction. If you could explain which direction the fuel is flowing in the hose between the rail and the fpr, that would clear it all up in my eyes. Link to comment Share on other sites More sharing options...
Guest Usmann A Posted June 25, 2006 Share Posted June 25, 2006 Tony have you seen a schmatic of inside a Aermotive FPR? the 2nd pump is pumping opposite the first, agreed, but its a fixed volume, what happens when 2 flowrates approach one another in a fixed volume? they cannot expand, thus the pressure of the fuel increaces. fuel flow doesnt count as much as pressure because it it doesnt matter which way the fuel moves in the rail, but yet that its keep constantly full,its always pressureised,remeber this isnt intercooler piping,not air movement when Volume is changed, yet liquid, andvolume is fixed. the system is held at a constant state of pressure by the reg, and bled off when required form any point. Its a simple fuel system, as long as the lines and rail are maintained with the correct pressure of fuel, flow doesnt matter, its one pressure, bar the return line. look at the aermotive pdf file, do you think that the fuel in each rail is isolated from each other? I hope this clears my point. Fuel flow doesnt account for much, because all is know is that Justin agrees with my setup and so do BL. and many other people. And its managed to supply enough fuel for me to be 10.5 AFR at 36psi boost on my ok sized turbo. So both pumps are contributing. :) ps, it also managed over 740rhhp at 29psi 2 years ago. bit of facutal info there for ya. Link to comment Share on other sites More sharing options...
GeordieSteve Posted June 26, 2006 Author Share Posted June 26, 2006 Anyone know the widths of the hoses coming from the fuel pumps? 8mm? Link to comment Share on other sites More sharing options...
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