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Fuel Line routing?
by
stewardc
on 15 Oct, 2012 04:51
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Is there a "proper" way to route the small return lines that go from injector to injector. I'm replacing mine with silicon lines and want to do it right.
Any pics would be nice.
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#1
by
stewardc
on 15 Oct, 2012 08:31
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Anyone
?
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#2
by
92EcoDiesel Jetta
on 15 Oct, 2012 09:11
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Daisy chain them (in series) with a cap on the last injector.
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#3
by
stewardc
on 15 Oct, 2012 11:57
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Daisy chain them (in series) with a cap on the last injector.
Oh. I know that, but how do you guys route them through all the junk that's there.....or does it even matter ?
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#4
by
745 turbogreasel
on 15 Oct, 2012 14:39
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I make them all long enough to cut down on the side of the road at least once.
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#5
by
TurboJ
on 15 Oct, 2012 16:21
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...and if you want to make sure there's the least possibility of leakage, I suggest twin return lines; i.e. from both ends of the injector bank.
Then just fit a Y-connector between them and the return port on the pump.
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#6
by
stewardc
on 15 Oct, 2012 17:43
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...and if you want to make sure there's the least possibility of leakage, I suggest twin return lines; i.e. from both ends of the injector bank.
Then just fit a Y-connector between them and the return port on the pump.
Wow, I never thought of that. I think I'll try it.
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#7
by
8v-of-fury
on 15 Oct, 2012 19:29
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I too like that idea!
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#8
by
745 turbogreasel
on 15 Oct, 2012 19:40
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I like to crimp my return line and launch the little cap into orbit though...
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#9
by
ORCoaster
on 15 Oct, 2012 20:12
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I lost several caps to an overpressure issue when I went to WVO. Seems I had the valves wired backwards and when I expected the fuel to flow during purge switch location I would send my plug a flying someplace. Oil would cascade all over the front of the engine and I slightly tempted to use a bad word. Once I put a meter on the setup it was a simple switch of colored plugs to the stock black end and problem solved.
I like the duel sided idea as well. Why not? Might be useful to have an alternative back route. Escape route?
DAS
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#10
by
Gizmoman
on 16 Oct, 2012 05:00
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...and if you want to make sure there's the least possibility of leakage, I suggest twin return lines; i.e. from both ends of the injector bank.
Then just fit a Y-connector between them and the return port on the pump.
Sounds pretty slick - any photos of that set-up? Maybe it's too early in the morning, but I'm not getting a clear picture of how that works 
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#11
by
TurboJ
on 16 Oct, 2012 06:59
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No picture, but the idea is that you have a return hose (back to pump) from both ends of the injector bank.
From injectors #1 and #4 make the "outmost" line go back to the pump, instead of just the one from the injector #4.
Y-connect them together for the return to the pump housing, or fit a twin banjo.
It works.
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#12
by
TylerDurden
on 16 Oct, 2012 07:11
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Not sure how any additional lines/fittings could reduce the potential for leaking.
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#13
by
TurboJ
on 16 Oct, 2012 07:16
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By easing off the pressure that builds onto the plugged return connector on the #1 injector, that's how.
This setup will reduce the pressure peaks on the injectors' return line system, especially at and near the #1 injector.
Up until, of course, your total fuel return flow exceeds the capacity of the lines altogether. Which can happen on a high-performance pump.
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#14
by
92EcoDiesel Jetta
on 16 Oct, 2012 07:56
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By easing off the pressure that builds onto the plugged return connector on the #1 injector, that's how.
This setup will reduce the pressure peaks on the injectors' return line system, especially at and near the #1 injector.
Up until, of course, your total fuel return flow exceeds the capacity of the lines altogether. Which can happen on a high-performance pump.
Do these pressure peaks on the injector return lines do any harm or affect running of the engine? It's just excess fuel that is not injected which has to go back to the tank. Why add another connection which is one more potential leak point? Another banjo? Are you kidding?