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3500 LZ9 swap, fueling questions by Kameirocco
Started on: 09-05-2025 08:38 PM
Replies: 1 (35 views)
Last post by: jelly2m8 on 09-06-2025 12:16 AM
Kameirocco
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Report this Post09-05-2025 08:38 PM Click Here to See the Profile for KameiroccoSend a Private Message to KameiroccoEdit/Delete MessageReply w/QuoteDirect Link to This Post
Not sure where to toss this... but here it goes.

i'm at the point where i have most of everything to toss this engine into my fiero. The issue now is fueling.
the LZ9 is a returnless system, and of course the fiero is a return system.

Question 1 ) Is there a stock GM fuel rail that fits the 3500 that has a return on it? e.g., something from a 3100 or 3400?
Question 2 ) the LS swap trick with a C5 filter/regulator combo - it makes the returnless system a return system... but i cannot find the GM female to barb connections..
the female ones i found are 800-120 and 800-121... but i cannot find any that have the male quick disconnect end to a barb.

If anything i think 1 would work, but i have no idea on the words i'd need to search to find what i need
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jelly2m8
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Report this Post09-06-2025 12:16 AM Click Here to See the Profile for jelly2m8Send a Private Message to jelly2m8Edit/Delete MessageReply w/QuoteDirect Link to This Post
Option 2 is the easiest and most preferred way to deal with a return less fuel system. The fitting you want is easily found at any parts stores. Option 1 probably does not exist.

[This message has been edited by jelly2m8 (edited 09-06-2025).]

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