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 04-26-2021, 10:00 AM   #1
6600DURAMAX
Registered User
 
6600DURAMAX's Avatar
 
Join Date: Nov 2000
Location: Wheatfield IN, USA
Posts: 1,124
LC-8 Motor ?? ( LS)

Looking at a zero mile LC8 engine - it has no wire harness, ecm, throttle pedal ect….

What controller and wire harness, pedal will work, probably a dumb question but this is my first LS swap

Stock the engine made roughly 350 HP and 375 FTLB - what can be expected with a tuned ecm, headers, ect.

Looking to put a 6L80e behind the motor

8'' lift with 35- 37'' tires - 4.56 gears

Toughts? Concerns
__________________
1972 K5 - LS3/408 (595Hp) -6L80e-One Tons with 4.56, 20'' Beadlocks with 37'' rubber, full TMI interior, JL Audio .....

1971 CREWMAX Build.....at body shop for couple more years
6600DURAMAX is offline   Reply With Quote
Old 04-26-2021, 10:14 PM   #2
ls1nova71
Registered User
 
ls1nova71's Avatar
 
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
Re: LC-8 Motor ?? ( LS)

You know that is a CNG engine, right?
__________________
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 04-27-2021, 08:24 AM   #3
6600DURAMAX
Registered User
 
6600DURAMAX's Avatar
 
Join Date: Nov 2000
Location: Wheatfield IN, USA
Posts: 1,124
Re: LC-8 Motor ?? ( LS)

My understanding is that the engine can be configured to run on CNG, LP or Unleaded Gas. Since the motor is a crate with no wiring ( just intake to pan) figured a standalone wire harness will solve the issues and will be able to run on gas just like any other LS. I am not pulling this out of another vehicle - individual has it as a new crate engine

Someone PLEASE correct me if Im wrong
__________________
1972 K5 - LS3/408 (595Hp) -6L80e-One Tons with 4.56, 20'' Beadlocks with 37'' rubber, full TMI interior, JL Audio .....

1971 CREWMAX Build.....at body shop for couple more years
6600DURAMAX is offline   Reply With Quote
Old 04-27-2021, 12:29 PM   #4
mongocanfly
Post Whore

 
mongocanfly's Avatar
 
Join Date: May 2015
Location: Alabama
Posts: 14,670
Re: LC-8 Motor ?? ( LS)

When I looked up LC8, the 1st thing I saw was "unique"...to me that means hard to find so ething that works...it does say it's the only LS engine that runs on both gas and LP

Copied this...
(It is unique among the Gen. 3 and Gen. 4 engines in that it’s the only one designed to operate on gasoline and LPG or CNG fuels.)

For my money I'd stick to a basic LS engine and not get caught up in "unique"
__________________
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
mongocanfly is offline   Reply With Quote
Old 04-27-2021, 12:40 PM   #5
bigmoe
Registered User
 
bigmoe's Avatar
 
Join Date: Oct 2014
Location: Brandon, Manitoba, Canada
Posts: 995
I would check with the harness builders. It might have some unique sensors and plugs and well as injectors. Or maybe you could swap them out. I suspect the internals will be nothing different? Might take some research but I’m sure it’s not insurmountable.
Posted via Mobile Device
bigmoe is offline   Reply With Quote
Old 04-27-2021, 02:46 PM   #6
bigmoe
Registered User
 
bigmoe's Avatar
 
Join Date: Oct 2014
Location: Brandon, Manitoba, Canada
Posts: 995
Re: LC-8 Motor ?? ( LS)

https://www.onallcylinders.com/2019/...e-performance/

According to this it sounds like a great motor.
bigmoe is offline   Reply With Quote
Old 04-27-2021, 03:26 PM   #7
mongocanfly
Post Whore

 
mongocanfly's Avatar
 
Join Date: May 2015
Location: Alabama
Posts: 14,670
Re: LC-8 Motor ?? ( LS)

I only looked at psi...but when I entered LC8, it came back no results
__________________
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
mongocanfly is offline   Reply With Quote
Old 04-30-2021, 08:03 AM   #8
AussieinNC
Moderator
 
AussieinNC's Avatar
 
Join Date: Jun 2017
Location: Cherryville, NC
Posts: 2,204
Re: LC-8 Motor ?? ( LS)

As I understand these engines will run gasoline, CNG or LPG....

They are not configured to run on E-85...

A couple of articles on these links will give you the details...

https://www.onallcylinders.com/2019/...am-specs-more/

https://www.onallcylinders.com/2019/...e-performance/

I believe these engines do not use AFM but do have VVT as standard....

Hope this helps

__________________
Family and country before all others...

2006 Chevy Silverado (Daily Driver)
2012 Chevy Equinox

AussieinNC is offline   Reply With Quote
Old 04-30-2021, 09:28 AM   #9
bigmoe
Registered User
 
bigmoe's Avatar
 
Join Date: Oct 2014
Location: Brandon, Manitoba, Canada
Posts: 995
Re: LC-8 Motor ?? ( LS)

https://www.wholesalegmpartsonline.c.../23111916.html

Found this above showing a factory harness and it lumps LC8 with the L96 6.0.
bigmoe is offline   Reply With Quote
Old 04-30-2021, 10:10 AM   #10
6600DURAMAX
Registered User
 
6600DURAMAX's Avatar
 
Join Date: Nov 2000
Location: Wheatfield IN, USA
Posts: 1,124
Re: LC-8 Motor ?? ( LS)

thinking of switching gears since my PSI harness will not support the LC8 - at least the technician that I talked to.

Now switching gears and thinking about one of the two below

BLUEPRINT Engines - 376ci LS, fully dressed with accessories or their 408ci LS, was going to start a new thread on opinions or experience with BLUEPRINT - they seem very reputable
__________________
1972 K5 - LS3/408 (595Hp) -6L80e-One Tons with 4.56, 20'' Beadlocks with 37'' rubber, full TMI interior, JL Audio .....

1971 CREWMAX Build.....at body shop for couple more years
6600DURAMAX is offline   Reply With Quote
Old 05-03-2021, 06:00 PM   #11
tinydb84
Registered User
 
tinydb84's Avatar
 
Join Date: Jul 2009
Location: San Jose Ca
Posts: 2,871
Re: LC-8 Motor ?? ( LS)

If you have the money then a complete turn key engine is nice. I haven't heard as much about the Blueprint LS engines (see a lot more of typical SBC stuff with them).

It's more work but I'd probably go to a junkyard and pull an LS. Around here you can get a 5.3 with a year warranty for $220. If you take your time you can get the wiring harness/exhaust manifolds/intake/starter and they usually don't charge you extra as long as its all bolted to the engine

Thompson or Texas Speed is who I would go with if I had the money and I was shooting for big numbers but they don't usually include the front accessories.
__________________
David
Used parts build: http://67-72chevytrucks.com/vboard/s...d.php?t=638991
My brother's Nova: http://www.67-72chevytrucks.com/vboa...d.php?t=727985
Rear suspension rework: http://www.67-72chevytrucks.com/vboa...d.php?t=750557
Instagram: myfabguy
tinydb84 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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 10:44 AM.


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