LS3 Swap into 1998 Corvette
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Melting Slicks
Joined: Mar 2001
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From: Parkland Florida
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LS3 Swap into 1998 Corvette
We are currently swapping a GM crate LS3 376/525 HP engine into my 1998 Corvette. Anyone know what to do with the return line for the fuel rail? Thanks.
Melting Slicks
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From: West Branch, MI
I've done the same thing to my 98. Put in an LS3, almost 700 to the rear wheels (on 7.5 psi boost, LOTS of room to up the HP). I sent the crank out and had the 58 replaced with the 24. Easy peasy. I continue to use the return fuel line as its a better setup than the single line for high HP cars. I am not using the stock intake however. I'm using a FAST 102 with the FAST fuel rails and an LS2 TB. Added my own regular and just kept the return line so it's basically pretty well custom, just bigger lines to carry more fuel to feed the beast. My LS3 came out of a 2010 Camaro that was built with all forged stuff. Works very well.
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Melting Slicks
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From: Parkland Florida
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Racer
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I've done the same thing to my 98. Put in an LS3, almost 700 to the rear wheels (on 7.5 psi boost, LOTS of room to up the HP). I sent the crank out and had the 58 replaced with the 24. Easy peasy. I continue to use the return fuel line as its a better setup than the single line for high HP cars. I am not using the stock intake however. I'm using a FAST 102 with the FAST fuel rails and an LS2 TB. Added my own regular and just kept the return line so it's basically pretty well custom, just bigger lines to carry more fuel to feed the beast. My LS3 came out of a 2010 Camaro that was built with all forged stuff. Works very well.
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Melting Slicks
Joined: Mar 2001
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From: Parkland Florida
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Well all I can say is it pays to have good friends. Here is the answer to my question. The 3/8" male tube on the filter/regulator is the line from the pump. The 5/16" male tube is for the return line that has to be shortened. The female fitting is the line that goes to the fuel rail. VERY IMPORTANT. After all is done, hook up battery and cycle key. Do Not Start. Just so the pump primes. Cycle two or three times so the pressure builds. Then check for any leaks.
Melting Slicks
Joined: Nov 2009
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From: West Branch, MI
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Melting Slicks
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From: Parkland Florida
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Melting Slicks
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From: Parkland Florida
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Sounds like a good project, Bob.
Before you completely poopoo the idea of a PCM swap, do a bit more research. It seems like a daunting task, but it shouldn't be that bad and just requires some patience.
Before you completely poopoo the idea of a PCM swap, do a bit more research. It seems like a daunting task, but it shouldn't be that bad and just requires some patience.
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Melting Slicks
Joined: Mar 2001
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From: Parkland Florida
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Melting Slicks
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From: West Branch, MI
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Melting Slicks
Joined: Mar 2001
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From: Parkland Florida
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Melting Slicks
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From: Parkland Florida
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I agree.The 99-04 PCM is a better PCM overall, processes faster, and has more parameters but still a lot of work.