The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain > LSx Swaps

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 07-28-2014, 01:11 PM   #1
mitchell72
Registered User
 
mitchell72's Avatar
 
Join Date: Dec 2012
Location: Fontana, Ca
Posts: 228
Origional gas tank?

Hey guys, I am seriously considering the swap. I want to keep my truck as original as possible. Can I use the the original fuel tank with the swap? Are there any issues here? Thanks. P.S. My truck has a wood bed and Don't want to do a fuel cell for aesthetic reasons.
mitchell72 is offline   Reply With Quote
Old 07-29-2014, 09:43 PM   #2
Chevydude56
Registered User
 
Chevydude56's Avatar
 
Join Date: Sep 2009
Location: Syracuse NY
Posts: 110
Re: Origional gas tank?

what year truck ?
__________________
1967 Suburban 292 3spd
1964 Chevy II wagon
1971 Monte Carlo 402BB
1964 Cadillac series 62 2dr
1964 Bonneville 2dr/ht
1967 GTO
1978 Chevy Van 30
1989 R30 Crew Dually Bonus Cab
Chevydude56 is offline   Reply With Quote
Old 07-29-2014, 10:21 PM   #3
66LSx
Registered User
 
66LSx's Avatar
 
Join Date: Nov 2013
Location: Green Bay, WI
Posts: 435
Re: Origional gas tank?

It'll be loud/annoying with either a fuel pump in the cab inside the tank or even having the pump be directly underneath the floorboards on the frame rail I would think.

Too loud.... well most think [so I've heard].... most eventually swap to the rear mounted tank with either a rear mounted pump or an rear in-tank pump... (best of both worlds).

Most figure once you go LS swap.... originality is kinda

Rear mounted +1 but leave the tank mounts in the cab and you can always go back to OEM.

I did the rear tank for both baffles/quietness and safety but left my in-cab tank mounts alone and intact. Figure if they take the LS swap out... they can take the rear mounted tank out too.

Rear mounted tank with in-tank Aeromotive Stealth 340 - Should be quiet enough to not get annoyed.
__________________
1966 C10 SWB Fleet
5.3L LM7 Vortec / 4L60e Swap
1966 C10 w/ 5.3L/4L60e Build Thread
2012 GMC Sierra 5.3L 4x4 CCSB
66LSx is offline   Reply With Quote
Old 07-29-2014, 10:30 PM   #4
dec010974
Registered User
 
dec010974's Avatar
 
Join Date: Oct 2012
Location: Miami, Florida
Posts: 911
Re: Origional gas tank?

Yes you can. I altered my 1972 c10 sending unit for a return line. Pm your number and I'll text you a pic Or I'll post a pic tomorrow. Good luck. Clark
dec010974 is offline   Reply With Quote
Old 07-29-2014, 10:34 PM   #5
66LSx
Registered User
 
66LSx's Avatar
 
Join Date: Nov 2013
Location: Green Bay, WI
Posts: 435
Re: Origional gas tank?

Quote:
Originally Posted by dec010974 View Post
Yes you can. I altered my 1972 c10 sending unit for a return line. Pm your number and I'll text you a pic Or I'll post a pic tomorrow. Good luck. Clark
Dec010974 I believe is running a carb'd LQ4 setup and his fuel pressures may be ALOT lower than a normal LS-fuel-rail. (Holley Blue = 9 PSI @ 110 GPH)

Alot quieter moving the fuel at such a lower PSI than 60+ PSI for a EFI swap.
__________________
1966 C10 SWB Fleet
5.3L LM7 Vortec / 4L60e Swap
1966 C10 w/ 5.3L/4L60e Build Thread
2012 GMC Sierra 5.3L 4x4 CCSB
66LSx is offline   Reply With Quote
Old 07-30-2014, 05:26 PM   #6
dec010974
Registered User
 
dec010974's Avatar
 
Join Date: Oct 2012
Location: Miami, Florida
Posts: 911
Re: Origional gas tank?

Bingo 66lsx! Give the handsome young man the prize. Ladies and gentlemen another prize won at the county fair. He won a fuzzy teddy bear.
dec010974 is offline   Reply With Quote
Old 07-30-2014, 05:45 PM   #7
66LSx
Registered User
 
66LSx's Avatar
 
Join Date: Nov 2013
Location: Green Bay, WI
Posts: 435
Re: Origional gas tank?

Quote:
Originally Posted by dec010974 View Post
Bingo 66lsx! Give the handsome young man the prize. Ladies and gentlemen another prize won at the county fair. He won a fuzzy teddy bear.
???

Not quite sure if your being a smart *** or?

Just figured I'd keep the O.P. aware that it can be done but when you stated you implemented it without issue to the original tank... you did not mention you were a simplified low PSI and quieter carb fueling setup.

VERY pertinent to the discussion at hand.

Thanks for the compliment of doing my homework in full vs. only telling half the story like some people around here
__________________
1966 C10 SWB Fleet
5.3L LM7 Vortec / 4L60e Swap
1966 C10 w/ 5.3L/4L60e Build Thread
2012 GMC Sierra 5.3L 4x4 CCSB
66LSx is offline   Reply With Quote
Old 07-30-2014, 05:49 PM   #8
mitchell72
Registered User
 
mitchell72's Avatar
 
Join Date: Dec 2012
Location: Fontana, Ca
Posts: 228
Re: Origional gas tank?

thanks guys, the truck is a 72, yes it has a wood bed and it is a short bed, with leafs too.

i wouldn't mind using the original tank, but if i cant, i would like to keep it in place (for looks) and then do a under the bed tank. it will be a fuel injected application, so i will be using a high pressure fuel pump.

i guess i will see how loud it is.
mitchell72 is offline   Reply With Quote
Old 07-30-2014, 09:14 PM   #9
ls1nova71
Registered User
 
ls1nova71's Avatar
 
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
Re: Origional gas tank?

Ive done it a couple of times and you can barely hear the pump on my green truck, its a Walbro mounted under the cab. Its quiet enough that you dont hear it at all when the engine is running, and I have quiet exhaust. The kind of pump I think plays a factor in noise, knock off Walbro pumps are noisier. The two builds in my sig show both ways I did it and they are both EFI.
.
__________________
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
ls1nova71 is offline   Reply With Quote
Old 07-30-2014, 11:05 PM   #10
dec010974
Registered User
 
dec010974's Avatar
 
Join Date: Oct 2012
Location: Miami, Florida
Posts: 911
Re: Origional gas tank?

Wow. Unbelievable. 66lsx, you have no clue. I wasn't being a smart ass. I just saying that you pay attention to detail. It was actually a joke. Also thanks for giving him a lil more info on my setup. We don't need to cast stones. No harm was intended. Most of us that modify, alter, or jerry rig things on our trucks are smart or thinkers, so Thanks for the compliment. Just to throw it out there, I am willing to give anyone, as much info as I can, on any mods I make on my LSx swaps. My number has even been posted in threads. I would have posted pics but it's hard for me to do so using my iPad. In my first post, on this thread, I offered to send pics of the mods, to show Mitchell72, exactly what I did. The pics are in my cell phone as I type. Please don't call me a smart ass. You owe me an apology. That's an insult to me and everyone that attempts to help fellow LSx swappers. Mr. 66lsx, lighten up and have a great day. Clark.
dec010974 is offline   Reply With Quote
Old 07-30-2014, 11:08 PM   #11
dec010974
Registered User
 
dec010974's Avatar
 
Join Date: Oct 2012
Location: Miami, Florida
Posts: 911
Re: Origional gas tank?

Mitchell72, (305)815-6660. Hit me up, I have those pics.
dec010974 is offline   Reply With Quote
Old 07-30-2014, 11:12 PM   #12
66LSx
Registered User
 
66LSx's Avatar
 
Join Date: Nov 2013
Location: Green Bay, WI
Posts: 435
Re: Origional gas tank?

Quote:
Originally Posted by dec010974 View Post
You owe me an apology. That's an insult to me and everyone that attempts to help fellow LSx swappers..
giving ya crap bucko
__________________
1966 C10 SWB Fleet
5.3L LM7 Vortec / 4L60e Swap
1966 C10 w/ 5.3L/4L60e Build Thread
2012 GMC Sierra 5.3L 4x4 CCSB
66LSx is offline   Reply With Quote
Old 07-31-2014, 07:11 AM   #13
dec010974
Registered User
 
dec010974's Avatar
 
Join Date: Oct 2012
Location: Miami, Florida
Posts: 911
Re: Origional gas tank?

here are the pics mitchell72. Ihope these help.
Attached Images
   
dec010974 is offline   Reply With Quote
Old 07-31-2014, 07:44 AM   #14
dec010974
Registered User
 
dec010974's Avatar
 
Join Date: Oct 2012
Location: Miami, Florida
Posts: 911
Re: Origional gas tank?

Here are the pics mitchell72. I hope these help. The blue cap is a block off I use for my lsx carbureted swap. It is connected to an AN adapter. the fuel sending unit was tapped and fitted for the adapter(fuel return). The feed line on the sending unit uses a threaded AN Adapter. In the last pic, the black AN fittng will be used, when I convert back to FI. I hope this helps.
dec010974 is offline   Reply With Quote
Old 07-31-2014, 11:23 AM   #15
Matt Cramer
Registered User
 
Join Date: Apr 2012
Location: Covington, GA
Posts: 386
Re: Origional gas tank?

Quote:
Originally Posted by mitchell72 View Post
thanks guys, the truck is a 72, yes it has a wood bed and it is a short bed, with leafs too.

i wouldn't mind using the original tank, but if i cant, i would like to keep it in place (for looks) and then do a under the bed tank. it will be a fuel injected application, so i will be using a high pressure fuel pump.

i guess i will see how loud it is.
On my '72, I stuffed a Walbro 255 gph in tank pump (made for a '94-'97 Miata, of all things) into the stock in cab tank. Just slid the sock off and put a hose on the end of the pick-up tube. Went through a couple of ideas trying to figure out how to seal the wires best before settling for grommets and bolts, which worked pretty well. I used the vapor line as a return.

Now that it's all sorted, the main drawback is that it's loud. Some sort of insulation on the outside of the tank would probably help. Putting an external pump under the cab may work better.

Also, be sure to use EFI rated hose on all high pressure lines.
__________________
Matt Cramer
1972 Chevy C10 - 4.8 swap, long bed, and maybe one dent free body panel somewhere - SOLD
4.8 LS build thread
Matt Cramer is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 06:25 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com