Fuel Rail Entry/Exit

[scotty-2-forty]

Does it matter which end of the fuel rail (aftermarket) is the fuel entrance and which is the return? I would like to not think so, but it's early and I'm still drain bead ...:alcoholic

[boost infested]

no.

[Projex240]

i wouldnt think so. why do you ask?

[WDRacing]

Nope...I've had the pressure start on either end, so long as you have room for the FPR your golden.

[:: orion ::]

Use dual feed, FPR in the middle.

That way there's less chance of one lean cylinder, like #4 seems to be in the KA (last injector to receive fuel, coincidence...? Who knows...)

That just looks bad ***...

[scotty-2-forty]

i wouldnt think so. why do you ask?

If you look at the way the fuel lines are connected to my rail, they use 180deg bends and also look fugly. I'm going to change to 90deg bends and reroute the front of the rail to the Aeromotive fuel filter I just installed (not shown in pic), which is in the stock location. I'll post pics later.

[andrave]

if you running lean on #4, you would not be running an adequate fuel delivery system.

[:: orion ::]

^^^ Agreed...but since #4 is more common to detonate, you could speculate that it gets less fuel. Even with a good pump and such...

That's all. No real info to back that up, except #4 dies alot on the KA.

Detonation (from a lean condition / inadequate fuel system) should be present in all cylinders and destroy pistons in #1, 2, and 3...but often it's only #4.

I'm not stating fact, just speculating...and I made that earlier comment tongue-in-cheek...as I just like how mean it looks with 2 big fat lines running to the fuel rail.

- Brian

[WDRacing]

Its the same with the RB and the #6, the last cylinder is the hottest do to water, oil and fuel. Its simply the last inline to for all of the fluids, so they are the hottest and at the least pressure when they get there. On the RB we usually have the injectors flow tested and install the richest one in the #4 on up.

[andrave]

well, if you think about it, as long as the fuel pressure regulator is properly regulating pressure, the injectors should be each seeing the same amount of fuel.Correct me if I'm wrong,but if the regulator was at 30 psi, then the pressure at the #1 and the #4 injectors would be identicaly- 30 psi.Just like you inflate a ballon with a couple psi, and the pressure is spread equally inside it.

just a thought, not useful at all. but since the question was answered I see on reason to not go on a tangent.

[WDRacing]

correct for fuel pressure, unless the pump isn't of sufficient volume.

[scotty-2-forty]

I changed out the fuel lines ... see the before and after below. Everything's perfect and the braided hose is much cleaner looking than the blue hose. No performance problems; pressure's unchanged ... I'm happy FYI, the hose is high pressure stainless steel braided fuel line hose capable up to 1000psi over the high pressure blue hose rated at 320psi ... not that it matters, but I feel safer! :crazy

BEFORE:

AFTER:

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