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return to returnless fuel system conversion

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Old Aug 27, 2010 | 02:58 AM
  #1  
ace69247no13's Avatar
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Car: 1991 z28
Engine: 350 .060 over 400 crank, 12:1
Transmission: t5
Axle/Gears: 2.73 currently
return to returnless fuel system conversion

has anyone done the conversion? if so help i need info
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Old Aug 27, 2010 | 03:26 AM
  #2  
vetteoz's Avatar
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From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: return to returnless fuel system conversion

How " returnless " is it ?
Are you putting a regulator by the tank and dead heading to the fuel rails?
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Old Aug 27, 2010 | 05:32 AM
  #3  
ace69247no13's Avatar
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Car: 1991 z28
Engine: 350 .060 over 400 crank, 12:1
Transmission: t5
Axle/Gears: 2.73 currently
Re: return to returnless fuel system conversion

Originally Posted by vetteoz
How " returnless " is it ?
Are you putting a regulator by the tank and dead heading to the fuel rails?

well i would like to go completely returnless so regulator in or near the tank and yes as you say dead heading the fuel rails
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Old Aug 27, 2010 | 09:26 AM
  #4  
Apeiron's Avatar
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: return to returnless fuel system conversion

What would be the advantage?
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Old Aug 27, 2010 | 10:16 AM
  #5  
ace69247no13's Avatar
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Car: 1991 z28
Engine: 350 .060 over 400 crank, 12:1
Transmission: t5
Axle/Gears: 2.73 currently
Re: return to returnless fuel system conversion

i want to do this to stop heating the fuel up so much by recirculating from the engine compartment
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Old Aug 27, 2010 | 10:31 AM
  #6  
Apeiron's Avatar
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: return to returnless fuel system conversion

So instead you're going to have it sitting still inside the lines in the engine compartment for logner?
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Old Aug 27, 2010 | 10:51 AM
  #7  
ace69247no13's Avatar
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Posts: 29
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Car: 1991 z28
Engine: 350 .060 over 400 crank, 12:1
Transmission: t5
Axle/Gears: 2.73 currently
Re: return to returnless fuel system conversion

not really and the thing i am trying to stop is not the heated fuel in the lines in the engine compartment but the superheated fuel in the tank
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Old Aug 27, 2010 | 10:55 AM
  #8  
Apeiron's Avatar
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: return to returnless fuel system conversion

Why is it getting superheated in the tank?
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Old Aug 27, 2010 | 10:59 AM
  #9  
ace69247no13's Avatar
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Car: 1991 z28
Engine: 350 .060 over 400 crank, 12:1
Transmission: t5
Axle/Gears: 2.73 currently
Re: return to returnless fuel system conversion

your guess is as good as mine. i have been having the problem ever since i put the engine back in. the car sat parked for three years without an engine. it did not have the issue it is having now before it was parked nothing changed since it got parked. same engine same exhaust everything
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Old Aug 27, 2010 | 11:06 AM
  #10  
built91Z28's Avatar
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From: Orlando
Car: 1991 Camaro Z28
Engine: 357, Canfield heads, solid roller,
Transmission: Upgraded 03 Cobra T56
Axle/Gears: 9" 3.50 gears and Detroit Locker
Re: return to returnless fuel system conversion

I've always been under the assumption that a return style fuel system is cooler due to the fuel always moving around and not sitting still. Do you have the heat shield between your muffler and fuel tank? What do you mean by superheated? Have you measured the temperature?
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Old Aug 27, 2010 | 11:10 AM
  #11  
ace69247no13's Avatar
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Car: 1991 z28
Engine: 350 .060 over 400 crank, 12:1
Transmission: t5
Axle/Gears: 2.73 currently
Re: return to returnless fuel system conversion

yes the heat shield is there. and like i said nothing has changed since before the car sat for three years, and it did not have a problem before it sat. by superheated i just mean a hell of alot hotter than it should be, hot enough to cause the engine to stall and fuel pump to groan
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