 914 1.8 fuel flow questions |
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| michaelmoo |
 Feb 10 2007, 03:59 AM
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Member  Group: Members Posts: 312 Joined: 21-May 04 From: Kennesaw, GA Member No.: 2,092  |
I need some one to explain something to me. I was looking at the diagram on Pelican and something didn’t seem right. If you follow the “Flow” arrows you don’t reduce the fuel pressure until after it goes to the injectors. Shouldn’t the fuel pressure regulator get the higher pressure fuel from the pump before the injectors? Maybe I don’t fully understand, but it just doesn’t make since to me.
I’m redoing all the fuel lines in my car (was carbs, but going back to FI) and need to know if the Pelican diagram is correct. Help please!!! Thanks, Mike Attached image(s) 
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| Dave_Darling |
Feb 10 2007, 10:41 AM
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914 Idiot Group: Members Posts: 15,204 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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Think of the high-pressure loop of the fuel system as a garden hose with the water turned on. You can put your thumb over the end of the hose--what happens to the pressure inside of it? It goes up. Take your thumb away, and the pressure drops. The FPR is like your thumb, it serves as a way to plug the hose to raise the pressure, and then it opens up when the "correct" pressure has been reached.
So what it does is it keeps the part of the fuel system that is "upstream" of it at the specified pressure, not the part that is "downstream". --DD |
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Posts in this topic
michaelmoo 914 1.8 fuel flow questions Feb 10 2007, 03:59 AM
type47 i think the diagram is correct. the high pressure ... Feb 10 2007, 06:32 AM kwales That picture is right. The pressure regulator se... Feb 10 2007, 09:19 AM Bleyseng Yes, the straight out port is the return port/line... Feb 10 2007, 09:54 AM
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