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#226 |
Registered User
Join Date: Sep 2016
Location: Tulsa, OK
Posts: 415
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Re: Doing LS Swap - I have no idea what I'm doing!
Well, time to start getting around to the truck again. Had a slight delay, as Mother's Day and wife's birthday came around - so, new kitchen sink & faucet and some concert tickets kinda set me back a bit.
Anyway, just purchased the sending unit and fuel pump for the Wrangler fuel tank swap. Decided to go that route. I still need to get the tank. After searching on here and reading up on the Wrangler tank swap, I ended up getting the sending unit for a '87 S10 Blazer, an AC Delco #EP381 fuel pump. Will I still need the pressure regulator? From what I can tell, that pump is rated at 60psi and 155lph. And, I'm guessing I'll still want a fuel filter in line, right?
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1971 C10 - Hugger Orange/White My Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=780197 LS Swap Thread: https://67-72chevytrucks.com/vboard/...d.php?t=811460 |
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#227 |
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Join Date: Jun 2015
Location: Carlos MN
Posts: 2,041
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Re: Doing LS Swap - I have no idea what I'm doing!
You will need a fuel filter regulator. Most use the C5 Corvette FFR. Get AC Delco or Wix brand.
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#228 |
Registered User
Join Date: Jan 2019
Location: Bonner Springs, KS
Posts: 56
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Re: Doing LS Swap - I have no idea what I'm doing!
If it’s a truck intake, it has a regulator and requires a return line
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#229 | |
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Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: Doing LS Swap - I have no idea what I'm doing!
Quote:
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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 |
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#230 |
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Join Date: Sep 2016
Location: Tulsa, OK
Posts: 415
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Re: Doing LS Swap - I have no idea what I'm doing!
I believe I have a return system. It's a 2003 Flex Fuel engine. I'll grab a couple pics this evening of the intake and post them up.
If it is a return system, then I'll need the Corvette filter/regulator, right? I have the WIX #33737 saved in my spreadsheet as a possible part to get. Would I still need another filter in line either before/after that, since it already has one built in?
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1971 C10 - Hugger Orange/White My Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=780197 LS Swap Thread: https://67-72chevytrucks.com/vboard/...d.php?t=811460 |
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#231 |
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Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 1,218
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Re: Doing LS Swap - I have no idea what I'm doing!
or you can run the return line
this is why turbo guys like them the pressure regulator is on the fuel rail and will provide extra fuel on boost automatically |
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#232 | |
Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: Doing LS Swap - I have no idea what I'm doing!
Quote:
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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 |
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#233 |
Senior Member
![]() Join Date: Aug 2018
Location: Long Island, NY
Posts: 235
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Re: Doing LS Swap - I have no idea what I'm doing!
Came across the thread and read every post. Congrats on the baby, getting the bolts out, and making progress through all of it.
Following! |
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#234 |
Registered User
Join Date: Sep 2018
Location: Dayton Oh
Posts: 125
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Re: Doing LS Swap - I have no idea what I'm doing!
I will be doing the LS swap sometime this summer also, following along here.
Great build so far. What was your main reason for not keeping the in cab tank? Was it the smell or the sound of the pump that I’ve heard can be very loud. I think one of the coolest things on these trucks, mine is a 67, is the side fill for the tank. I was hoping to keep this set up but if the pump is that loud, I would seriously reconsider |
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#235 |
Registered User
Join Date: Nov 2014
Location: Austin
Posts: 749
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Re: Doing LS Swap - I have no idea what I'm doing!
Well, I’m going to do the in cab in tank pump in a couple weeks/month...will report on the noise.
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#236 |
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Join Date: Sep 2016
Location: Tulsa, OK
Posts: 415
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Re: Doing LS Swap - I have no idea what I'm doing!
A little later than I thought, but, nonetheless... Pics of the intake and fuel rails.
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1971 C10 - Hugger Orange/White My Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=780197 LS Swap Thread: https://67-72chevytrucks.com/vboard/...d.php?t=811460 |
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#237 |
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Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: Doing LS Swap - I have no idea what I'm doing!
Thats a returnless rail, so you will need the Corvette filter/regulator.
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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 |
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#238 | |
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Join Date: Sep 2016
Location: Tulsa, OK
Posts: 415
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Re: Doing LS Swap - I have no idea what I'm doing!
Quote:
And, after looking at that picture... makes me realize, I really need to clean that thing up. Man, it's dirty.
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1971 C10 - Hugger Orange/White My Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=780197 LS Swap Thread: https://67-72chevytrucks.com/vboard/...d.php?t=811460 |
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#239 |
Senior Member
![]() Join Date: Jul 2015
Location: Warrenton VA
Posts: 1,050
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Re: Doing LS Swap - I have no idea what I'm doing!
Spend some time and smooth it out, they look sooo nice when they are smoothed out!
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71 c-10 Long Bed, under the knife for a No Limit Engineering Wide Ride Chassis Pack and coil over static drop. 07 Silverado Classic 2wd 95 Camaro 427SBC/TH350 |
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#240 |
Registered User
Join Date: Sep 2016
Location: Tulsa, OK
Posts: 415
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Re: Doing LS Swap - I have no idea what I'm doing!
Received part of my birthday gifts this past weekend! A new Wrangler gas tank, and the WIX Corvette Filter/Regulator! Woohoo!
Now, I can start fitting up the tank, making any adjustments needed. Then, I can start mounting the parts, running the lines, and hopefully get the fuel system finished up.
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1971 C10 - Hugger Orange/White My Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=780197 LS Swap Thread: https://67-72chevytrucks.com/vboard/...d.php?t=811460 |
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#241 |
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Join Date: Feb 2012
Location: Ruskin Florida
Posts: 4,559
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Re: Doing LS Swap - I have no idea what I'm doing!
Pics man PICS! I am dying here!
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70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350 |
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#242 |
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Join Date: Sep 2016
Location: Tulsa, OK
Posts: 415
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Re: Doing LS Swap - I have no idea what I'm doing!
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1971 C10 - Hugger Orange/White My Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=780197 LS Swap Thread: https://67-72chevytrucks.com/vboard/...d.php?t=811460 |
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#243 |
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Join Date: Sep 2016
Location: Tulsa, OK
Posts: 415
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Re: Doing LS Swap - I have no idea what I'm doing!
OK, I'm sure this has probably been discussed before, or even achieved. But, I had a thought... Would it be possible to keep the stock gas tank and use it as a filler for the new tank under the bed? Are you with me?
I'm thinking, instead of adding a fill spot to the bed somewhere - keep the tank behind the seat. Run a line to the new tank as a filler hose, either gravity fed, or with an external pump (which I already have). This way, I could fill up the stock tank as always and let that fill the new tank under the bed and supply the fuel pump, basically as an auxiliary fuel cell. I get the benefit of having the baffled tank with the new equipment to supply the motor, but also a longer range due to the extra tank. Also, I won't have to fab up a fill location in the bed for the new tank. Does any of that make sense? The hose size from 1 tank to the next would probably have to be larger than what is already there, now that I think on it more. I was hoping to just use the current size coming out of the stock tank. Convert it to a hard line to keep it from sagging, or re-purpose the stock hardline to run to the back. Or, just use steel braided line and keep it from sagging too much - keep the low spots out of it. I don't know... sometimes I overthink things, or get accused of dumb ideas - maybe this is one of them. ![]()
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1971 C10 - Hugger Orange/White My Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=780197 LS Swap Thread: https://67-72chevytrucks.com/vboard/...d.php?t=811460 |
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#244 |
Registered User
Join Date: Sep 2016
Location: Tulsa, OK
Posts: 415
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Re: Doing LS Swap - I have no idea what I'm doing!
Got some fuel line fittings ordered for the new setup. The fittings for the regulator showed up today. The adapters for the sending unit should arrive Saturday. One step closer...
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1971 C10 - Hugger Orange/White My Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=780197 LS Swap Thread: https://67-72chevytrucks.com/vboard/...d.php?t=811460 |
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#245 |
Registered User
Join Date: Sep 2016
Location: Tulsa, OK
Posts: 415
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Re: Doing LS Swap - I have no idea what I'm doing!
Took my original radiator to a shop yesterday to see if he can get it fixed up. I know it had a leak, and looks like some prior "fixes" done to it. The guy said he'd clean it up and test it, and let me know how bad it is. I'm wondering if it'll be worth the fix, or just end up with a new one.
Saw this setup the other day - starting to wonder if it may be something to try for the price. https://www.alloyworksplus.com/produ...mmy-67-72_56f0
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1971 C10 - Hugger Orange/White My Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=780197 LS Swap Thread: https://67-72chevytrucks.com/vboard/...d.php?t=811460 |
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#246 | |
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Join Date: Nov 2014
Location: Austin
Posts: 749
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Re: Doing LS Swap - I have no idea what I'm doing!
Quote:
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#247 | |
Senior Member
![]() Join Date: Jul 2015
Location: Warrenton VA
Posts: 1,050
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Re: Doing LS Swap - I have no idea what I'm doing!
Quote:
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71 c-10 Long Bed, under the knife for a No Limit Engineering Wide Ride Chassis Pack and coil over static drop. 07 Silverado Classic 2wd 95 Camaro 427SBC/TH350 |
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#248 |
Registered User
Join Date: Sep 2016
Location: Tulsa, OK
Posts: 415
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Re: Doing LS Swap - I have no idea what I'm doing!
Ok... so slight dilemma. I dropped off my cpu yesterday to the shop that is going to build me a new harness and flash the cpu and tune it. He called me late last night and said, "we might have an issue... your cpu is reading as a 2005 4.8L motor". But, the VIN I got from the salvage is from a 2003 5.3L. I've gone through the different scenarios, different cpu from a donor - but it was all hooked up when I got it delivered. Now, could they have hooked it all up to deliver it? Sure. But, everything looked like it hadn't been touched.
Now, I have a pic of the underside from when I swapped the pan out, and the crank has a cast number of "12552216". When I search that number, it appears as used on the 5.3, 6.0, 6.2L engines. Would that be a tell all sign, or do I still need to look at the piston heads to tell for sure? I'm going to see if I can rent a borescope from one of the parts stores to look for sure - hopefully, I can. Any other tell-tale signs that I can look for? Maybe they sent me the wrong VIN # - I'm sure it can happen. But, how do I really tell what I have? Do I need a legit VIN to program the computer?
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1971 C10 - Hugger Orange/White My Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=780197 LS Swap Thread: https://67-72chevytrucks.com/vboard/...d.php?t=811460 |
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#249 |
Senior Member
![]() Join Date: Jul 2015
Location: Warrenton VA
Posts: 1,050
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Re: Doing LS Swap - I have no idea what I'm doing!
You have a 5.3, see here. https://sites.google.com/site/sloppy...a-4-8-or-a-5-3
Your tuner should be able to flash in anything he want's. The 4.8 and 5.3 use the same ECM, just the tune is different. I would verify your injector part # and give him that info and just let him flash in a 5.3 tune with a little more timing and turn off security and the rear 02's and go for it.
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71 c-10 Long Bed, under the knife for a No Limit Engineering Wide Ride Chassis Pack and coil over static drop. 07 Silverado Classic 2wd 95 Camaro 427SBC/TH350 |
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#250 |
Registered User
Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 1,218
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Re: Doing LS Swap - I have no idea what I'm doing!
The return less rail also suggests its a 05 motor
03 truck motors are a return style fuel rail The only for sure way i know to id 4.8 vs 5.3 is pull the pan and look at the rods and crank Real good chance your motor is an 05 4.8 ls motor They are still a decent motor I had one in my service van ran great The pcm should also have a vin in it for what 05 vehicle it came from Powerblock had this happen they bought a 5.3 from the yard pushed it hard on the dyno 1000 ish hp then opened it up and discovered they got a 4.8 instead |
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