Confused about stock fuel system
Thread Starter
On The Tree
Joined: Jun 2002
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From: Sacramento
Confused about stock fuel system Hi,
I'm trying to figure out how our stock fuel system works on my wife's '02 SS. I'm a mustang guy who's doing his first f-body mods.
Are all the LS1 fuel systems returnless?
From what I understand on these returnless systems there is a regulator in the tank. Does the regulator adjust for manifold vacuum/boost?
Thanks,
Steve
I'm trying to figure out how our stock fuel system works on my wife's '02 SS. I'm a mustang guy who's doing his first f-body mods.
Are all the LS1 fuel systems returnless?
From what I understand on these returnless systems there is a regulator in the tank. Does the regulator adjust for manifold vacuum/boost?
Thanks,
Steve
Thread Starter
On The Tree
Joined: Jun 2002
Posts: 196
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From: Sacramento
Re: Confused about stock fuel system Thanks for the reply. I'm getting closer now.
I noticed some kits come with an FMU. How do they work without a return line?
The idea of tuning for boost without a constant fuel pressure across the injectors is.. uh.. wow.
I noticed some kits come with an FMU. How do they work without a return line?
The idea of tuning for boost without a constant fuel pressure across the injectors is.. uh.. wow.
TECH Fanatic
Joined: Nov 2001
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From: Las Cruces, NM
Re: Confused about stock fuel system There is a regulator in the tank, it does not adjust for vacuum/boost.
The computer injector flowrate tables compensate for vacuum, but not boost. The map sensor is only good to 1 bar (atmospheric pressure). You can remove the stock one and install an adjustable vacuum/boost referenced one outside at the engine or were the electrical connections are for pump (just ahead of the wheel well)
Gary
The computer injector flowrate tables compensate for vacuum, but not boost. The map sensor is only good to 1 bar (atmospheric pressure). You can remove the stock one and install an adjustable vacuum/boost referenced one outside at the engine or were the electrical connections are for pump (just ahead of the wheel well)
Gary
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From: Las Cruces, NM
Re: Confused about stock fuel system I guess I was not clear. We do have a return line its just ahead the filter (which is just ahead of the rear tire. A fmu is just a fuel pressure regulator but allows more than a 1:1 increase in fuel pressure with boost.
Gary
Gary
Thread Starter
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From: Sacramento
Re: Confused about stock fuel system Thanks for the info. It's not your fault, I didn't understand how a returnless system could have a return line <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
I've figured it all out now though. Thanks!
Steve
I've figured it all out now though. Thanks!
Steve
