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LT4 fuel upgrade question

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Old Oct 25, 2019 | 11:03 AM
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Default LT4 fuel upgrade question

I want to upgrade to an LT4 fuel system in my 2014 stingray base. Do i need anything else other than what I have pictured below and a tune? My horsepower will be between 600-700rwhp, thanks!




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Old Oct 28, 2019 | 07:21 AM
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You don't need to replace the fuel rails.
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Old Oct 28, 2019 | 08:33 PM
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Yeah on my 2 stingrays i only replaced the pump and gasket. On the first one i replaced one of those middle fuel lines because of that blue fuel resistant thread lock stuff but on the second one i just reused the original pipe and no issues. On my current Z06 i am running the fic injectors and getting the fuel rails off wasnt terrible but wasnt fun either. Id skip the rails if i were you
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Old Nov 2, 2019 | 08:08 PM
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Originally Posted by us3rname
You don't need to replace the fuel rails.

Actually we don't "officially know" that the rails are the same. 2014 rails had different part numbers so its possible that the 2015 base was upgraded to Z06 rails by default to keep production costs down by minimizing different part numbers. When I upgraded my 2014 base to a full Z06 fuel system, I upgraded the rails as well just in case. Its cheap enough to be 100% sure..
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Old Nov 2, 2019 | 08:15 PM
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Originally Posted by FYREANT
Actually we don't "officially know" that the rails are the same. 2014 rails had different part numbers so its possible that the 2015 base was upgraded to Z06 rails by default to keep production costs down by minimizing different part numbers. When I upgraded my 2014 base to a full Z06 fuel system, I upgraded the rails as well just in case. Its cheap enough to be 100% sure..
yeah, no idea if they are the same but they aren’t needed for the lt4 injector or pump swap. I used my lt1 rails without a single issue supporting 630hp
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Old Nov 2, 2019 | 08:16 PM
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Originally Posted by us3rname
yeah, no idea if they are the same but they aren’t needed for the lt4 injector or pump swap. I used my lt1 rails without a single issue supporting 630hp
Correct, not needed to swap the other two, but of you are already gonna have it all ripped apart why not just do it all at once and know that its done!
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Old Nov 2, 2019 | 08:23 PM
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Originally Posted by FYREANT
Correct, not needed to swap the other two, but of you are already gonna have it all ripped apart why not just do it all at once and know that its done!
Looks like they are different. I wonder how much of an impact that difference in capacity makes on fueling capabilities.


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Old Nov 3, 2019 | 12:35 PM
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Originally Posted by us3rname
Looks like they are different. I wonder how much of an impact that difference in capacity makes on fueling capabilities.

nice find. Im Fairly certain that the parts are the same for all 2015+ models. I’m pretty sure is just 14’ that was different. Would have to pull part numbers to confirm.
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