LS and stock Tank - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Flubyu · 01-21-2018, 11:47 AM

Does anyone have a parts list for what’s need to modify the stock tank in my 71 C10 to work with my 5.3? It’s either this or going the Wrangler tank route but I fell this may be easier and cheaper? Thoughts?

**mongocanfly** · 01-21-2018, 12:24 PM

my 1st recommendation is to get the tank outta the cab...but that's a me thing..if you want to keep the stock tank you can use a walbro 255 inline pump with a vett filter/reg...you will need a return line on the tank...if your wanting the pump in the tank I'm not sure what you need..

ls1nova71 · 01-21-2018, 12:51 PM

Depending on how much you plan to drive the truck, the Wrangler tank may be the better way to go. Electric fuel pumps are designed to push fuel, not pull it, so having the pump in the tank is a far more reliable option. There will be people who say a frame mounted pump works fine for them, but then there will be a lot of people who say their frame mounted pump only lasted 5k miles or so. The problem it the pump isn't being cooled by being submerged in fuel like an in tank pump, then add to that its being asked to do a job it wasn't designed to do, suck the fuel up and out of the tank which is a good 2 1/2 feet before it gets to the pump. True, there is a syphoning effect once the fuel starts moving, but that still doesn't usually help in the long haul. I have a frame mounted Walbro255 on my truck, but I also have a sumped fuel tank, and the fuel comes out the bottom of the tank, directly into a pre-filter then into the pump. It's worked flawlessly for the last 33k miles, but it is a mess to try and clean the pre-filter which I have only done once, at about the 10k mile mark, and was shocked at the amount of trash that was in it, even after I had thoroughly cleaned the tank prior to putting any fuel in it. Just some food for thought....

Flubyu · 01-21-2018, 09:22 PM

I was thinking of having the feed line at the bottom of the tank and have the return fuel use the original feed hose at the top. What’s the best way to get the fuel fumes out of the tank before cutting and welding on it? Is it possible? Not sure if my donor engine is a return or return less fuel rail? It’s out of an 04 Yukon.

**mongocanfly** · 01-21-2018, 09:31 PM

lots and lots of soap and water..a buddy of mine has converted several tanks...he uses soapy water to clean and then puts a nitrogen purge on the tank while welding...
either way the rails are on your engine if you go external pump you'll need a return fitting....if its a retrun rail you can cap it off with -an fittings if you use the vett filter/reg...the vett f-r will return to the tank..

ls1nova71 · 01-22-2018, 07:01 AM

I washed my tank out with dawn dish soap and a lot of water until it didnt smell like gas any more. If youre going to do it, do it at your own risk, because anything can happen and I dont want to be liable for it blowing up on you!

As for the lines, you can use the original feed line on the sender for the return, that's the way mine is run and it works perfectly. A 2004 engine could be either return or returnless. If its a return rail, just skip the expensive Corvette filter and just run a cheap EFI rated filter and run the return line back to the tank. The vacuum sourced fuel pressure regulator on the rail is actually better than the set regulator in the 'vette filter IMO. But if you do have a returnless then you will meed the Corvette filter, but dont skimp on a cheap one, get either a Wix or AC Delco, the cheap house brand filters at most auto parts stores are junk and I've seen many bad straight out of the box.

verdell · 01-22-2018, 10:48 AM

If relocating the tank is an option, I've seen guys use an '87 blazer tank and fuel sending unit. Because it's for a fuel injected vehicle, the tank has a built in pan and the fuel sending unit has a return. Keep in mind the stock in-tank fuel pump would have to be upgraded but it's a simple bolt in. There are a couple of guys running this set up with '96 5.7 vortec AC Delco fuel pumps with zero issues.

Tork? · 01-23-2018, 01:04 PM

Quote:

Originally Posted by verdell

If relocating the tank is an option, I've seen guys use an '87 blazer tank and fuel sending unit. Because it's for a fuel injected vehicle, the tank has a built in pan and the fuel sending unit has a return. Keep in mind the stock in-tank fuel pump would have to be upgraded but it's a simple bolt in. There are a couple of guys running this set up with '96 5.7 vortec AC Delco fuel pumps with zero issues.

Does the 87 sender work with stock fuel gauge?

Flubyu · 01-23-2018, 04:42 PM

Yes, I believe it does.

**1970 CST Short Wide** · 01-23-2018, 11:41 PM

I have the sending unit with an added return and pump that I ran with my LS until I moved tank. Worked fine with the Vett style filter. All Yours for $50 plus shipping if interested

Flubyu · 01-23-2018, 11:53 PM

Any issues running that setup? Pics? May be interested pending more info.

**1970 CST Short Wide** · 01-23-2018, 11:56 PM

Quote:

Originally Posted by Flubyu

Any issues running that setup? Pics? May be interested pending more info.

No problems at all. I just updated post with pic and added the pump, wasn't sure I still had it.

Flubyu · 01-24-2018, 12:16 AM

Does this sender and pump have an type fittings or what type? Any issues with the pump as far as pulling fuel up the sender and thru the pump rather than pushing? Wondered if a second pump was a good idea if fuel was being pulled from the tank rather than a gravity feed.

**1970 CST Short Wide** · 01-24-2018, 01:10 AM

Sold

Flubyu · 01-24-2018, 01:14 AM

Wow. Ok..

**1970 CST Short Wide** · 01-24-2018, 02:05 AM

Quote:

Originally Posted by Flubyu

Wow. Ok..

Wow sorry, I just realized you started this post. I hate to renig on a deal but I kind of feel I owe you. Tork you good with this if fyublu wants this????

Flubyu · 01-24-2018, 09:10 AM

Let me know either in this thread or via PM. Thank you.

**1970 CST Short Wide** · 01-24-2018, 02:40 PM

Quote:

Originally Posted by Flubyu

Let me know either in this thread or via PM. Thank you.

Talked to other buyer. He will step back.
Yours for $50 plus shipping if you want it other wise I will go back to the other deal

Sorry for the F up but I want to be fair
Steve

Flubyu · 01-24-2018, 02:57 PM

I’ll take it, what’s your PayPal?

**1970 CST Short Wide** · 01-24-2018, 03:34 PM

Quote:

Originally Posted by Flubyu

I’ll take it, what’s your PayPal?

PM sent

**1970 CST Short Wide** · 01-24-2018, 10:17 PM

Once again SOLD

**1970 CST Short Wide** · 02-04-2018, 12:16 AM

Quote:

Originally Posted by Flubyu

I’ll take it, what’s your PayPal?

Have not heard from you and have Not seen payment. I sent PM giving you 3 days to respond. Your time is up, I'll be moving on
Thanks
Steve

Tork
You still interested??

Flubyu · 02-04-2018, 12:24 AM

Not sure why I hadn’t been notified of a PM. I sent payment on 1/27.

**1970 CST Short Wide** · 02-07-2018, 02:07 AM

Quote:

Originally Posted by Flubyu

Not sure why I hadn’t been notified of a PM. I sent payment on 1/27.

I sent you multiple PMs. Today is 2/6. No check yet

Flubyu · 02-07-2018, 11:41 AM

PM replied. As stated in PM please dispose of the check if time runs out on your end. As I already stated, I mailed it on 1/27. Not sure where this has landed, but I sure hopes it finds you in California!

01-21-2018, 11:47 AM	#1
Flubyu Registered User Join Date: Mar 2017 Location: Clever, Mo Posts: 69	LS and stock Tank Does anyone have a parts list for what’s need to modify the stock tank in my 71 C10 to work with my 5.3? It’s either this or going the Wrangler tank route but I fell this may be easier and cheaper? Thoughts?

01-21-2018, 12:24 PM	#2
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,583	Re: LS and stock Tank my 1st recommendation is to get the tank outta the cab...but that's a me thing..if you want to keep the stock tank you can use a walbro 255 inline pump with a vett filter/reg...you will need a return line on the tank...if your wanting the pump in the tank I'm not sure what you need.. __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

01-21-2018, 12:51 PM	#3
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,118	Re: LS and stock Tank Depending on how much you plan to drive the truck, the Wrangler tank may be the better way to go. Electric fuel pumps are designed to push fuel, not pull it, so having the pump in the tank is a far more reliable option. There will be people who say a frame mounted pump works fine for them, but then there will be a lot of people who say their frame mounted pump only lasted 5k miles or so. The problem it the pump isn't being cooled by being submerged in fuel like an in tank pump, then add to that its being asked to do a job it wasn't designed to do, suck the fuel up and out of the tank which is a good 2 1/2 feet before it gets to the pump. True, there is a syphoning effect once the fuel starts moving, but that still doesn't usually help in the long haul. I have a frame mounted Walbro255 on my truck, but I also have a sumped fuel tank, and the fuel comes out the bottom of the tank, directly into a pre-filter then into the pump. It's worked flawlessly for the last 33k miles, but it is a mess to try and clean the pre-filter which I have only done once, at about the 10k mile mark, and was shocked at the amount of trash that was in it, even after I had thoroughly cleaned the tank prior to putting any fuel in it. Just some food for thought.... __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

01-21-2018, 09:22 PM	#4
Flubyu Registered User Join Date: Mar 2017 Location: Clever, Mo Posts: 69	Re: LS and stock Tank I was thinking of having the feed line at the bottom of the tank and have the return fuel use the original feed hose at the top. What’s the best way to get the fuel fumes out of the tank before cutting and welding on it? Is it possible? Not sure if my donor engine is a return or return less fuel rail? It’s out of an 04 Yukon.

01-21-2018, 09:31 PM	#5
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,583	Re: LS and stock Tank lots and lots of soap and water..a buddy of mine has converted several tanks...he uses soapy water to clean and then puts a nitrogen purge on the tank while welding... either way the rails are on your engine if you go external pump you'll need a return fitting....if its a retrun rail you can cap it off with -an fittings if you use the vett filter/reg...the vett f-r will return to the tank.. __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

01-22-2018, 07:01 AM	#6
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,118	Re: LS and stock Tank I washed my tank out with dawn dish soap and a lot of water until it didnt smell like gas any more. If youre going to do it, do it at your own risk, because anything can happen and I dont want to be liable for it blowing up on you! As for the lines, you can use the original feed line on the sender for the return, that's the way mine is run and it works perfectly. A 2004 engine could be either return or returnless. If its a return rail, just skip the expensive Corvette filter and just run a cheap EFI rated filter and run the return line back to the tank. The vacuum sourced fuel pressure regulator on the rail is actually better than the set regulator in the 'vette filter IMO. But if you do have a returnless then you will meed the Corvette filter, but dont skimp on a cheap one, get either a Wix or AC Delco, the cheap house brand filters at most auto parts stores are junk and I've seen many bad straight out of the box. __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

01-22-2018, 10:48 AM	#7
verdell Registered User Join Date: Feb 2013 Location: Columbus, MS Posts: 435	Re: LS and stock Tank If relocating the tank is an option, I've seen guys use an '87 blazer tank and fuel sending unit. Because it's for a fuel injected vehicle, the tank has a built in pan and the fuel sending unit has a return. Keep in mind the stock in-tank fuel pump would have to be upgraded but it's a simple bolt in. There are a couple of guys running this set up with '96 5.7 vortec AC Delco fuel pumps with zero issues.

01-23-2018, 04:42 PM	#9
Flubyu Registered User Join Date: Mar 2017 Location: Clever, Mo Posts: 69	Re: LS and stock Tank Yes, I believe it does.

01-23-2018, 11:41 PM	#10
1970 CST Short Wide Senior Moment Join Date: Mar 2002 Location: Pittsburg Ca Posts: 4,048	Re: LS and stock Tank I have the sending unit with an added return and pump that I ran with my LS until I moved tank. Worked fine with the Vett style filter. All Yours for $50 plus shipping if interested Attached Images __________________ 1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 Last edited by 1970 CST Short Wide; 01-23-2018 at 11:54 PM.

01-23-2018, 11:53 PM	#11
Flubyu Registered User Join Date: Mar 2017 Location: Clever, Mo Posts: 69	Re: LS and stock Tank Any issues running that setup? Pics? May be interested pending more info.

01-24-2018, 12:16 AM	#13
Flubyu Registered User Join Date: Mar 2017 Location: Clever, Mo Posts: 69	Re: LS and stock Tank Does this sender and pump have an type fittings or what type? Any issues with the pump as far as pulling fuel up the sender and thru the pump rather than pushing? Wondered if a second pump was a good idea if fuel was being pulled from the tank rather than a gravity feed.

01-24-2018, 01:10 AM	#14
1970 CST Short Wide Senior Moment Join Date: Mar 2002 Location: Pittsburg Ca Posts: 4,048	Re: LS and stock Tank Sold __________________ 1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565

01-24-2018, 01:14 AM	#15
Flubyu Registered User Join Date: Mar 2017 Location: Clever, Mo Posts: 69	Re: LS and stock Tank Wow. Ok..

01-24-2018, 09:10 AM	#17
Flubyu Registered User Join Date: Mar 2017 Location: Clever, Mo Posts: 69	Re: LS and stock Tank Let me know either in this thread or via PM. Thank you.

01-24-2018, 02:57 PM	#19
Flubyu Registered User Join Date: Mar 2017 Location: Clever, Mo Posts: 69	Re: LS and stock Tank I’ll take it, what’s your PayPal? __________________ '71 C-10 SWB Shop Truck Currently 350/350, soon to be LS'd.



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01-24-2018, 10:17 PM	#21
1970 CST Short Wide Senior Moment Join Date: Mar 2002 Location: Pittsburg Ca Posts: 4,048	Re: LS and stock Tank Once again SOLD __________________ 1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565

02-04-2018, 12:24 AM	#23
Flubyu Registered User Join Date: Mar 2017 Location: Clever, Mo Posts: 69	Re: LS and stock Tank Not sure why I hadn’t been notified of a PM. I sent payment on 1/27. __________________ '71 C-10 SWB Shop Truck Currently 350/350, soon to be LS'd.

02-07-2018, 11:41 AM	#25
Flubyu Registered User Join Date: Mar 2017 Location: Clever, Mo Posts: 69	Re: LS and stock Tank PM replied. As stated in PM please dispose of the check if time runs out on your end. As I already stated, I mailed it on 1/27. Not sure where this has landed, but I sure hopes it finds you in California! __________________ '71 C-10 SWB Shop Truck Currently 350/350, soon to be LS'd.

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