Fuel pump for a TBI - Chevy Impala SS Forum
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post #1 of 5 (permalink) Old 06-19-2019, 09:21 PM Thread Starter
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Fuel pump for a TBI

Last night I ordered a pump harness for my fuel pump. An Airtex. Right after I did the order the thought struck me that with my set up I may need more pressure. I've searched on here and found nothing concerning my question. So here it is. I've done some up grades to my LO5. Heads, cam, exhuast and a 46 MM TBI. I already have a 255 LPH pump sitting here but it's a TBI pump. Should I get an LT1 pump for the increased pressure? I'm going to put an adjustable fuel pressure regulator on it. Also, should I get the LT1 sending unit? I really don't know the difference between them other than the stock numbers.
Thanks all,

Mark: Snowman-33

93 9C1: Work & Cubic Ca$h This started with a new headlight and fender Celeritas In Conficiendo
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post #2 of 5 (permalink) Old 06-19-2019, 09:42 PM
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Here is some good info for GM fuel pumps-
TBI Fuel Pumps Specifications and Regulator Springs!!
I went with the EP 377 in my TBI wagon. I used the original sending unit, the pump fit without any issues and I have run it as high as 32ish PSI.
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post #3 of 5 (permalink) Old 06-19-2019, 10:41 PM Thread Starter
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Quote:
Originally Posted by Old Coot View Post
Here is some good info for GM fuel pumps-
TBI Fuel Pumps Specifications and Regulator Springs!!
I went with the EP 377 in my TBI wagon. I used the original sending unit, the pump fit without any issues and I have run it as high as 32ish PSI.
That was quick and it's almost painless $$$ wise. I searched last night and some more before I posted. OC, You da man!!!! Thanks a ton & Mrs. Snowman thanks you too. Well kinda.

Mark: Snowman-33

93 9C1: Work & Cubic Ca$h This started with a new headlight and fender Celeritas In Conficiendo
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post #4 of 5 (permalink) Old 06-19-2019, 11:46 PM
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Glad that I could help. Here is another great reference site for fuel pumps and specs-
https://walbrofuelpumps.com/walbro-oem-cross-reference
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post #5 of 5 (permalink) Old 06-20-2019, 08:32 PM Thread Starter
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OC, I appreciate all the links and I have saved them. Reading about the 377 pump I saw that it only flows 27 GPH (=108LPH) & 50 PSI. I have been under the impression that a 255 LPH would be the way to go here. I'm still trying to figure out the difference between the sending units.
Thanks again,

Mark: Snowman-33

93 9C1: Work & Cubic Ca$h This started with a new headlight and fender Celeritas In Conficiendo
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