Newbie on LS swap, fuel delivery questions
#1
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Hello,
I have been searching around a lot lately and can't figure out what to do with what I believe is the return line from the fuel rail. There is a lot of talk about return and returnless systems, and it confuses me. This is a 2000 LS1 from a Corvette. That fact was established by looking att block casting numbers.
The motor has got the fuel inlet on only one of the two fuel rails. Between the rails there is a crossover with what looks like a regulator and a hose sticking out of it (with some sort of threaded fitting).
Is that the return line that goes straight back to the tank?
Question number two: Would you recommend installing the EFI retrofit fuel pump with sump available from Tanks Inc? It looks nice and I would rather not ship a whole tank across the Atlantic Ocean.
Thanks,
I have been searching around a lot lately and can't figure out what to do with what I believe is the return line from the fuel rail. There is a lot of talk about return and returnless systems, and it confuses me. This is a 2000 LS1 from a Corvette. That fact was established by looking att block casting numbers.
The motor has got the fuel inlet on only one of the two fuel rails. Between the rails there is a crossover with what looks like a regulator and a hose sticking out of it (with some sort of threaded fitting).
Is that the return line that goes straight back to the tank?
Question number two: Would you recommend installing the EFI retrofit fuel pump with sump available from Tanks Inc? It looks nice and I would rather not ship a whole tank across the Atlantic Ocean.
Thanks,
#3
TECH Veteran
iTrader: (4)
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Can you post a pic of your fuel rail? It sounds like you may have a 97-98 Corvette engine, they have both a feed and return line on the rail. If you have what you think is a fuel pressure regulator on the rail, and it does in fact have a small vacuum hose attached to it, then its a return style rail.
#4
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Can you post a pic of your fuel rail? It sounds like you may have a 97-98 Corvette engine, they have both a feed and return line on the rail. If you have what you think is a fuel pressure regulator on the rail, and it does in fact have a small vacuum hose attached to it, then its a return style rail.
The casting on the block says 2000, but maybe the rail is 97-98? The engine served in a Volvo V70 before I bought it... Anything could have happened to this motors setup
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Here are the two connections I have on the rail, as seen in the picture, one is directly to the rail and the second one is connected to the crossover. All schematics I have seen so far only uses one single fuel line between filter/regulator and motor. That is why I am confused. So, the rubber hose (smells gasoline) with connector goes straight back to the tank?
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#7
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#8
#10
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Wouldn't come as much of a surprise if the retrofit sump pump does not fit. I have been out of luck lately when it comes to my automobiles. Min 6" height is needed for it, I will measure mine later this evening.
edit: tanks inc state that their oe replacement tank measures 7 3/4" in height, yay. It is tapered, but the thicker end is in the front.
Last edited by freda155; 08-24-2015 at 01:16 PM.
#11