460 Fuel System Page - Help Needed

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460 Fuel System Page - Help Needed

Gary Lewis
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I've created a new page on which I'm hoping we can document the ins and outs of the 460's fuel system.  It is at Fuel Systems/460 Fuel Systems.  But, I need your help!


I thought I understood it fairly well, but have proven to myself that I don't.  So I've embedded questions or statements in red that y'all need to help me with.  And, I'm sure there are things stated in there that are wrong, so please find those as well.

The main questions is: What trucks got the mechanical pump and which ones got the electric pump, and what determined that?


Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

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Re: 460 Fuel System Page - Help Needed

grumpin
My 1986 F250 has electric pumps in each tank, 19 gallons each. Steel tanks.

It has the "hot fuel" system. I have A/C which I understand is why it has the "hot fuel" system.

It is a non-catalyst truck, 8800 GVWR. I believe the last year for any non-catalyst trucks.

Has a 4180 Holley (Motorcraft) carburetor.

You probably already know this, but thought I would throw it in.

Thanks!
Dane
1986 F250HD SC XLT Lariat 4x4 460 C6-Sold
1992 Bronco XLT 4x4 351W E4OD
1998 GMC Sierra SLE K1500 350 4L60E
Arizona
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Re: 460 Fuel System Page - Help Needed

85lebaront2
Administrator
The rule I heard was two fold, A/C and hot climate areas for the hot fuel handling package. I am reasonably certain ambulance chassis models got the hot fuel package. Non-A/C and cooler climates received a mechanical fuel pump. FWIW, all the 460s through 1987 had provision for a mechanical pump, if the hot fuel package was installed, then a block-off plate with a bracket for the fuel lines was installed in place of the pump.

1987 was the last carbureted, non-catalyst 460, 1988 is when EFI and catalytic converters started.
Bill AKA "LOBO" Profile

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

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Re: 460 Fuel System Page - Help Needed

grumpin
Thanks!  

Dane
1986 F250HD SC XLT Lariat 4x4 460 C6-Sold
1992 Bronco XLT 4x4 351W E4OD
1998 GMC Sierra SLE K1500 350 4L60E
Arizona
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Re: 460 Fuel System Page - Help Needed

Gary Lewis
Administrator
Bill - I updated the page with your quote.  Hope that's ok.  
Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

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Re: 460 Fuel System Page - Help Needed

grumpin


I asked about fuel pressure in the carb post, don't know why I didn't check my manual!  

However my truck doesn't have a Tank Selector Relay.
Dane
1986 F250HD SC XLT Lariat 4x4 460 C6-Sold
1992 Bronco XLT 4x4 351W E4OD
1998 GMC Sierra SLE K1500 350 4L60E
Arizona
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Re: 460 Fuel System Page - Help Needed

85lebaront2
Administrator
1986 does not use a tank selector relay, 1985 did and possibly all the way back to 1980 on the E-series and 1983 on F-series. The 1986 EVTM shows exactly what the 1986 models did.

Fuel pressure, I knew it was pretty low, even a persnickety Carter/Edelbrock should have no problems at 4.3 psi.
Bill AKA "LOBO" Profile

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

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Re: 460 Fuel System Page - Help Needed

Gary Lewis
Administrator
The spec may be 4.3 psi, but that has to vary with what orifice is in the return. And, even after the return I measured 5 1/2 psi on Big Blue with the resistor in the circuit. Without the orifice the pressure is going to be more than 5 1/2, which is about the limit for an Eddy, so I wouldn’t feel comfortable w/o a regulator.
Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

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Re: 460 Fuel System Page - Help Needed

ArdWrknTrk
Administrator
The white seperator is .090", compared to the red & blue at .045, and .065.
You might find this as a way to keep the pressure down without resorting to drastic measures.

Then again, I know nothing about return regulators.
 Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.
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Re: 460 Fuel System Page - Help Needed

85lebaront2
Administrator
In reply to this post by Gary Lewis
I have a suspicion that the pump(s) in Big Blue might be for an early EFI system, they were a bit higher to operate the selector valves.
Bill AKA "LOBO" Profile

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

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Re: 460 Fuel System Page - Help Needed

Gary Lewis
Administrator
In reply to this post by ArdWrknTrk
Yup.  And to this day I don't know what orifice is in Big Blue.  Probably won't find out until I install the return-style regulator I have and take the hot fuel handling piece out.
Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI