Conversions & Swaps LSX Engines in Non-LSX Vehicles
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Fuel return

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Old 08-11-2011, 08:04 AM
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Default Fuel return

Hi All,
I am swapping a 2005 Chevy 8.1 in a 85 chevy K 30. The engine has no port for a fuel returnline at the Intake Manifold .
How can i solve the problem with the return line ?
If a return even necessary?

Greetings from Germany

Hardy
Old 08-11-2011, 08:57 AM
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the gen III/IV engines typically do not have a return at the lines; the fuel pressure regulator is either in the filter (corvette) or built into the sending unit.
Old 08-11-2011, 09:02 AM
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google search "LS1TECH corvette filter regulator" should give you all the information you need
Old 08-11-2011, 10:35 AM
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Here is a popular example of a return style fuel setup....it is one of the "Sticky" at the top of this "CONVERSIONS & HYBRIDS" column.
https://ls1tech.com/forums/conversio...ro-basics.html
see post #4
Old 08-11-2011, 01:36 PM
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Thank you all for the helpful reply

Hardy
Old 08-11-2011, 01:45 PM
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I want to add that I do not use the separate filter as shown in the diagram.
After speaking with John @ SPEARTECH, he told me that the filter adds too much pressure to the external pump. John added that because I already have a sock/strainer in the fuel tank, that this, when combined with the filter which is part of the filter/regulator would be a safe bet.
Please do a search for other Corvette filter/reg threads. You'll find other examples which use Russell connectors, instead of the barbed fittings which you'll see in the example above. This is what I used.



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