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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

EFI to CARB Conversion

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Old Mar 22, 2017 | 02:53 PM
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Freightrain's Avatar
Freightrain
Lead Driver
Joined: Jan 2003
Posts: 9,893
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From: Ohio
Club FTE Silver Member

Yes. If it could be just even 5# lower, then the regulator might handle it. It's just too much pressure to bypass through that small return line. It is the ol 10# of potato in a 5# sack routine.
 
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Old Mar 22, 2017 | 06:17 PM
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ArdWrknTrk's Avatar
ArdWrknTrk
pedant
Joined: Jan 2008
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From: EXTREME southwest CT
Club FTE Silver Member

Stock on a bricknose truck is 3/8 supply and 5/16 return.

​​​​​​​Maybe there is a reason the carbureted trucks had a resistor in the fuel pump 'run' wiring?
 
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Old May 5, 2017 | 09:26 AM
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  #18  
Sick6's Avatar
Sick6
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Joined: Mar 2015
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From: Central, WI
Connect the feed to the return with a T.

Run a holley adjustable 12-803 regulator to carb.
 
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