5.3 swap 91 GTA fuel system question
03-09-2018, 01:13 AM
#1
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5.3 swap 91 GTA fuel system question Hi I'm currently swaping my 91 trans am GTA from tpi to carbed 5.3. I am running all new fuel lines I was wondering if i need to run a return or not. I have a airtex e2000 inline pump I'm gonna be running with a regulator.
03-09-2018, 03:13 AM
#2
Just curious as to why the inline pump? When I swapped my 87 I bought a direct fit 255 for the tank. I also used the vette filter/regulator. Everything bolted up nicely and used all the stock stuff to boot.
03-09-2018, 04:50 PM
#4
Cypris isn't talking about using the stock pump, he's talking about using a Walbro 255LPH pump that just drops into place, just like the stock fuel pump, no modification needed. Using that plus "the Corvette filter/regulator" (search this site) is a quick, inexpensive (maybe $150 or so for both parts) & well-proven way to get a naturally-aspirated LS swap running.
If you're wanting to use an "airtex" (??) fuel pump with some unknown regulator, then I don't know if anyone will be able to give you a definite answer. I'd say that you'll probably have to run a return line, but it depends on your specific parts & how you set it up. Best bet is to contact whoever manufactures those parts & see what they recommend.
BTW, I'm spending the rest of this afternoon working to get my own GTA swap running...
If you're wanting to use an "airtex" (??) fuel pump with some unknown regulator, then I don't know if anyone will be able to give you a definite answer. I'd say that you'll probably have to run a return line, but it depends on your specific parts & how you set it up. Best bet is to contact whoever manufactures those parts & see what they recommend.
BTW, I'm spending the rest of this afternoon working to get my own GTA swap running...
03-10-2018, 07:11 AM
#5
Cypris isn't talking about using the stock pump, he's talking about using a Walbro 255LPH pump that just drops into place, just like the stock fuel pump, no modification needed. Using that plus "the Corvette filter/regulator" (search this site) is a quick, inexpensive (maybe $150 or so for both parts) & well-proven way to get a naturally-aspirated LS swap running.
If you're wanting to use an "airtex" (??) fuel pump with some unknown regulator, then I don't know if anyone will be able to give you a definite answer. I'd say that you'll probably have to run a return line, but it depends on your specific parts & how you set it up. Best bet is to contact whoever manufactures those parts & see what they recommend.
BTW, I'm spending the rest of this afternoon working to get my own GTA swap running...
If you're wanting to use an "airtex" (??) fuel pump with some unknown regulator, then I don't know if anyone will be able to give you a definite answer. I'd say that you'll probably have to run a return line, but it depends on your specific parts & how you set it up. Best bet is to contact whoever manufactures those parts & see what they recommend.
BTW, I'm spending the rest of this afternoon working to get my own GTA swap running...
OP, did the regulator come with instructions? I dont do carb'd engines, so not sure how an electric fuel pump that is constantly running at a set pressure wouldn't just push too much fuel to the carb without some kind of return?
03-10-2018, 05:58 PM
#6
He said he's running a carburetor, so a Walbro255 and a Corvette filter wont work for him, that will be about 10x as much fuel pressure as he needs.
OP, did the regulator come with instructions? I dont do carb'd engines, so not sure how an electric fuel pump that is constantly running at a set pressure wouldn't just push too much fuel to the carb without some kind of return?
OP, did the regulator come with instructions? I dont do carb'd engines, so not sure how an electric fuel pump that is constantly running at a set pressure wouldn't just push too much fuel to the carb without some kind of return?