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 12-21-2009, 03:15 PM   #1
Thealien
Senior Member
 
Thealien's Avatar
 
Join Date: Jun 2007
Location: USA, East coast
Posts: 2,636
LS engine swap info

A lot of questions have been asked lately about LS engine swaps. I have done a bunch of research and wanted to share what I have found. I hope it helps some of you out. Spend some time clicking the links, I have put a lot of the time into finding this stuff.

LT1swap lots of good wiring harness info with pictures and DIY tips

LT1swap

Lots of good LS information, what are the engine differences etc

LSprimer


LSprimer part II

A thread with LS engine swap questions and answers

Questions and answers

Another sites questions and answers

ANOTHER Question and answer thread

I will add to this post and thread as I go through my information

Last edited by Thealien; 12-22-2009 at 08:37 AM.
Thealien is offline   Reply With Quote
Old 12-21-2009, 03:16 PM   #2
Thealien
Senior Member
 
Thealien's Avatar
 
Join Date: Jun 2007
Location: USA, East coast
Posts: 2,636
Re: LS engine swap info

Here are a few Engine sources to look at. I only have experience with Spaulding Automotive. I will elaborate more when I finally start my build thread.

SPAULDING AUTO

Here is a you tube link from one of their ads

Spaulding auto ready to run package

A couple people have bought from these guys

Schram auto

Pacific fab also does pull out and ready to run packages they also have a pretty cool 4X4 Ls crossmember I'll talk about later

Pacific Fab

Another vender that seems to have happy customers?

TNScrambler

And last but not least car part.com

Car Part.com

These are all just a reference, buyer beware and I am not recomending anyone at the moment. Ask questions, try local and good luck there are deal out there

Last edited by Thealien; 01-30-2010 at 10:05 AM. Reason: Adding info
Thealien is offline   Reply With Quote
Old 12-21-2009, 03:16 PM   #3
Thealien
Senior Member
 
Thealien's Avatar
 
Join Date: Jun 2007
Location: USA, East coast
Posts: 2,636
Re: LS engine swap info

Motor mounts and adapter plates

A couple of drawings of adapter plates, you would need two of either plate. This one would move the engine forward some.

They are showing the wrong hole countersunk. The hole that should be countersunk is the one between the two 1.75 inch measurements. The point goes forward and to the top. You have to countersink the hole that ends up behind the motor mount. The two plates will be mirror images with the countersunk hole on opposite sides of the plate. This is more like most of the aftermarket adapter plates. Most of them are 5/16-3/8 while these are 1/4 inch. The slight thickness differences could change engine height. I haven't read much about anyone having any issues with any of the different thickness adapter plates.

Scroll down

S&P

multi position adapter plates

MULTI POSITION

Moroso scroll down

MOROSO

Year one

YEAR ONE

Car Shop

Car Shop

And advance adapters. They are the only one that doesn't use the bottom bolt hole to position the motor mount? Hmmm

Advance Adapters


Now the drawings say 1/4 inch and all the rest are 5/16-3/8 which in my humble opinion will slightly change where your engine sits, higher/lower?

There are some issues with crossmembers on the 4X4 trucks causing motor mount and crossmember problems. My truck is stock height so these won't work for me but 4" plus lifted vehicles can use these from Pacific Fabrication
Pacific Fabrication



Last edited by Thealien; 12-24-2009 at 10:23 PM. Reason: Added links
Thealien is offline   Reply With Quote
Old 12-21-2009, 03:17 PM   #4
Thealien
Senior Member
 
Thealien's Avatar
 
Join Date: Jun 2007
Location: USA, East coast
Posts: 2,636
Re: LS engine swap info

Wiring, harnesses, and connectors

If you want to modify your own harness there is some good info at LT1swap in the first post. Here is a list of links to places that either modify your own harness or build complete new ones. After contacting a bunch of them and having some emails go unanswered I am having my harness done by a board member


68 short step
Check him out for your project

Jims performance is very knowleagable and was the most reasonable. You must call him.

Jims


SPEARTECH


Wait4me

Current performance also has fuse/relay panels connectors and will either rework your harness or build new.

Current performance


LS1wiring harness


Nelson performance

In addition to currant performance here are a few places to get fuse/relay panels, connectors, pins and bulkhead connectors

Pictures of GM connectors


Bulkhead connector


Terminals wire connectors

If you know the connector part number and pin part number this is the place

MOUSER


Fuse blocks


Fuse block wiring kits

Painless circuit boss

Painless


Autotrend fuse relay

The brake switch you will need if you want cruise control

AC Delco D850A

Last edited by Thealien; 01-24-2010 at 02:09 PM.
Thealien is offline   Reply With Quote
Old 12-21-2009, 03:17 PM   #5
Thealien
Senior Member
 
Thealien's Avatar
 
Join Date: Jun 2007
Location: USA, East coast
Posts: 2,636
Re: LS engine swap info

Transmission info and adapters

If my transmission ever needs a rebuild I am going with these guys. Check out all the pictures and attention to detail!

Finish Line Transmission build thread


Not a lot of info to post here. The harnesses can be changed from either a 4l60 to a 4l80 and the other way around. It is easier to alter a 4l80 harness for the 4l60 but both are doable. The 4l80 has 2 VSS sensors and the 4l60 has one. If you have a 4l60 harness you have to add the other VSS for the 4l80. If you have a 4l80 harness you remove the extra VSS for the 4l60. It matters which one but if you are doing your own harness you will have the pin outs. If you are having it done they should know what to do if not find someone else. In the big round connector there are a couple of wires moved between the 4l60 and 4l80.

HERE IS THE DIFFERENCES IN THE TRANSMISSION WIRING


There is a big switch on the side of the transmission. It is your park/neutral safety switch. Many people remove this and that can be done. The PCM does use that information for more than the safety and gear indicator but from what I have read it is not necessary. Here is what I have found

The PCM uses the signal to adjust idle speed based on whether the car is in gear or in park/neutral.
As soon as the PCM "sees" the car go in gear it drops the idle speed by around 100 rpm to prevent jerking going into gear, and to prevent tugging at the torque converter.

It can be considered as optional on a swap. As long as the line is left open the PCM will always assume the car is in gear, and will drop to lower rpm when the engine is started. This also causes a much quicker rpm rampdown on a cold engine start.

Some aftermarket wiring harness companies that have no clue as to how the PCM works will wire this line to ground which makes the PCM think the car is always in park or neutral. On some applications this allows some diagnostic tests to be skipped (EGR, purge, etc.) so that these items can be left off without setting a code. The problem is that the idle is too fast then, and the car wantts to pull a little when sitting still, as well as other issues.


I have a 4X4 and am keeping the NP205 transfer case in the factory location using the 4L60 transmission. Here are the aprts I needed to make this work.


4L60 to 205



Here are some of those parts being installed(bottom first page)



And here is another thread showing more of that installation


The transmission must be disassembled to install the output shaft. I did not want to move my transfer case shifter or change my almost new driveshafts so this is the route I took. There are a couple of passenger side drop transfer cases that will mate to the 4L60 but I do not have the information on what works and what doesn't. If somebody has information on what works and how they handled the shifter etc I will be happy to include it. With all that being said I may still have driveshaft/transmission pan clearance issues due to being stock height. I will update with pictures when I know.

I am also going to try to modify my stock shifter linkage to work. Some say I won't be able to shift into first? Again I will update when I know.

Here are a couple of shifter linkage solutions


Lokar shift linkage



Lokar cable shift linkage


If you need to run a mechanical speedo with a 4L60 this is one solution


Shiftworks


The fittings on these 4l60/80 transmissions are not NPT but National pipe straight thread

And use fittings like these

Corvette servo information courtesy of Glock35ipsc

Corvette servo

Last edited by Thealien; 01-18-2010 at 12:55 PM.
Thealien is offline   Reply With Quote
Old 12-21-2009, 03:18 PM   #6
Thealien
Senior Member
 
Thealien's Avatar
 
Join Date: Jun 2007
Location: USA, East coast
Posts: 2,636
Re: LS engine swap info

Cooling

Here is some reading on cooling that will keep you busy. I will add more later I am tired of typing.

More than you thought there was to cooling


A couple of thread on an ebay aluminum radiator. If you conatct him he will add steam ports, change inlet and outlet sizes, you can even get them with fans!

Ebay Radiator


Ebay Radiator 2


His Ebay store


A fan install thread

Frugal fan install


Some hose adapters and steam port Ts Hose reducers etc. Look around this site a bit

JTR

Last edited by Thealien; 12-21-2009 at 08:07 PM.
Thealien is offline   Reply With Quote
Old 12-21-2009, 03:18 PM   #7
Thealien
Senior Member
 
Thealien's Avatar
 
Join Date: Jun 2007
Location: USA, East coast
Posts: 2,636
Re: LS engine swap info

Links to build threads

Calling all LS1 owners


Glocks build


LS1 into a 73


Ackattacks


69 Burb 5.3


Incredible HULK


Sicmaro


72BlazerCST


68 Short Step


Shifty


Killers 5.3


72 Shortbed 6.0


Super 73s 63 Chevy C10


68fleetsideC20 budget build


37 Ford lots of great fabrication and ideas!

Last edited by Thealien; 01-01-2010 at 11:30 AM.
Thealien is offline   Reply With Quote
Old 12-21-2009, 03:19 PM   #8
Thealien
Senior Member
 
Thealien's Avatar
 
Join Date: Jun 2007
Location: USA, East coast
Posts: 2,636
Re: LS engine swap info

AC compressor relocation options

THE EXPENSIVE ONES BUT???


A LESS EXOENSIVE SOLUTION BUT USES AN EXPENSIVE SANDEN COMPRESSOR


AND HERE IS THE THIRD OPTION

AC Compressor manifolds courtesy of Big Port Jimmy 6 search for AA2209

Docsblocks compressor manifolds


Cable X box for running a mechanical speedo from a VSS

Cable X


Power steering pump info

Use your old fitting on your new pump


Link to torque values

Scroll to the last 2 posts


Aeroforce technologies. Cool little gauge that plugs into your OBDII port and has lots of programable features!

AEROFORCE

Some interesting LS engine covers

ENGINE COVERS

LQ4/LQ9 engine mechanical service manual thanks to 1972 supercheyenne

LQ4/LQ9 engine service manual

Last edited by Thealien; 02-11-2010 at 11:53 AM.
Thealien is offline   Reply With Quote
Old 12-21-2009, 03:53 PM   #9
Thealien
Senior Member
 
Thealien's Avatar
 
Join Date: Jun 2007
Location: USA, East coast
Posts: 2,636
Re: LS engine swap info

Fuel system (any chance a mod can move this post up?)
The LS engines require 58-60 pounds pressure at the fuel rails. Older fuel rails had a regulator on the rails and there is a feed and return on these engines. On the later fuel rails there is only the feed on the rail. You need to have something like the filter regulator shown below to return the excess fuel to the tank. Some of the tanks these engines came with did this internally in the tank.

Corvette filter/regulator

I don't know how long this will last but a decent deal on the regulator/filter and he will take offers for less I am told


GF822

Lots of people use Walbro external pumps

Walbro external pumps and fittings

Dorman quick disconnects for GM fuel line

Dorman 5/16ths


Dorman 3/8ths

Russel AN quick disconnects

Russel 3/8ths


Russel 5/16ths

Don't have a way to make the GM quick disconnect? Try one of these

Dorman flare to quick disconnect

Fuel pump tank adapter

F-body LS1 fuel pump adapter kit

here is an installation tutorial of the adapter kit

Tutorial of adapter kit

Another gas tank modification

EFI pump tank mod

Dual tank info

Compliments of Glock35ipsc

Last edited by Thealien; 01-06-2010 at 11:51 PM.
Thealien is offline   Reply With Quote
Old 12-21-2009, 04:29 PM   #10
Ticker
Account Suspended
 
Join Date: Oct 2009
Location: Sammamish, WA
Posts: 2,404
Re: LS engine swap info

This will be great when it's all sorted out. Hopefully it'll be a sticky!

Thanks for doing it, and it makes a difference - that's why you try
Ticker is offline   Reply With Quote
Old 12-21-2009, 04:52 PM   #11
Clyde65
1965 Chevy C10, 2005 4.8L/4l60
 
Clyde65's Avatar
 
Join Date: Aug 2004
Location: DFW Texas
Posts: 7,639
Re: LS engine swap info

Sorry, I thought you were brain fried like me, Youre not, you just have a plan.

I think this is a FANTASTIC idea, and I applaud you taking the time to do it! I think others that see how easy this swap is will jump right in when they have information like you are putting together, Thanks Thealien!
__________________
Clyde65

69 Aristocrat Lo Liner build
http://67-72chevytrucks.com/vboard/s...84#post7561684



support our troops!

Last edited by Clyde65; 12-21-2009 at 04:54 PM.
Clyde65 is offline   Reply With Quote
Old 12-21-2009, 05:17 PM   #12
Thealien
Senior Member
 
Thealien's Avatar
 
Join Date: Jun 2007
Location: USA, East coast
Posts: 2,636
Re: LS engine swap info

Random parts/links

Brass fitting and adapters

LS engine pulling fixture

Happy Hooker

The last flaring tool you will ever need. Does the GM quick disconnects also and this is the best price I could find!
Mastercool universal flaring

GM Gen III & IV bolt and sensor list

Bolts and Sensors

There are not a lot of vacuum options on an LS manifold

Vacuum manifold

Some Vehicle Speed Sensor options VSS

VSS OPTIONS


BRAKE BOOSTER NIPPLE FOUND HERE


Last edited by Thealien; 01-28-2010 at 11:05 AM.
Thealien is offline   Reply With Quote
Old 12-21-2009, 05:43 PM   #13
Clyde65
1965 Chevy C10, 2005 4.8L/4l60
 
Clyde65's Avatar
 
Join Date: Aug 2004
Location: DFW Texas
Posts: 7,639
Re: LS engine swap info

You are doing a great job, thank you for doing this, if I would have had that happen to me, my PC would be in the middle of the street and I with a sledge hammer hoisted high over my head ready for the explosion of PC parts all over the neighborhood, but that is me.

May I add this for cooling, I know it is from the F word car forum but this is what I am doing and it really cools my truck fast.

http://www.fordmuscle.com/forums/coo...tric-fans.html
__________________
Clyde65

69 Aristocrat Lo Liner build
http://67-72chevytrucks.com/vboard/s...84#post7561684



support our troops!
Clyde65 is offline   Reply With Quote
Old 12-21-2009, 11:37 PM   #14
Super73
Registered User
 
Super73's Avatar
 
Join Date: Nov 2007
Location: Bay Area, Ca
Posts: 2,811
Re: LS engine swap info

If there are any direct questions that i can help with, please let me know. I've been dealing with LS1's since 2001 and as well as being a moderator here, I am a moderator on LS1tech.com and Performancetrucks.net
__________________
------Motor---------------Bottle
60'---1.53---------------1.41
1/8---6.58 @ 105.92----5.87 @ 118.41
1/4---10.38 @ 126.97----9.24 @ 142.49
Super73 is offline   Reply With Quote
Old 12-22-2009, 12:42 AM   #15
Captainfab
60-66 Nut

 
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 21,252
Re: LS engine swap info

Thank you for putting this together. At some point in time I'm sure I will be doing a LS swap, so this will come in handy.

On the motor mount adapter plates there are two drawings, is one of each needed for a swap?

One other source that I know of for wiring, connectors and a lot of other EFI related components is this one.

http://www.eficonnection.com/eficonnection/default.aspx

He does some really cool things like the 24X coil per plug conversion for older EFI engines. Just lots of cool stuff that he does.
__________________
Power Steering Box Adapter Plates For Sale HERE
Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE
Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE
Hydroboost Mounting Plates HERE
Captainfab is offline   Reply With Quote
Old 12-22-2009, 01:02 AM   #16
Super73
Registered User
 
Super73's Avatar
 
Join Date: Nov 2007
Location: Bay Area, Ca
Posts: 2,811
Re: LS engine swap info

For the adapter plates, 2 of one picture will work... They both use one of the existing SBC bolt holes. If memory serves me, the lower one keeps the motor in the factory location where the upper one moves the motor slightly.
__________________
------Motor---------------Bottle
60'---1.53---------------1.41
1/8---6.58 @ 105.92----5.87 @ 118.41
1/4---10.38 @ 126.97----9.24 @ 142.49

Last edited by Super73; 12-22-2009 at 01:03 AM.
Super73 is offline   Reply With Quote
Old 12-22-2009, 02:03 AM   #17
jgh64pkup
Sunburst C10!!!
 
jgh64pkup's Avatar
 
Join Date: Jan 2009
Location: Eastland, Texas
Posts: 2,560
Re: LS engine swap info

thanks for this thread
__________________
Gage
2003 Duramax Efi live, 4" straight
1999 Mustang GT Turbo 5.3/Glide Build
1996 RCSB Nitrous 5.3/T-56 Build
jgh64pkup is offline   Reply With Quote
Old 12-22-2009, 07:47 AM   #18
Thealien
Senior Member
 
Thealien's Avatar
 
Join Date: Jun 2007
Location: USA, East coast
Posts: 2,636
Re: LS engine swap info

Correct I will add that to the description

Quote:
Originally Posted by Super73 View Post
For the adapter plates, 2 of one picture will work... They both use one of the existing SBC bolt holes. If memory serves me, the lower one keeps the motor in the factory location where the upper one moves the motor slightly.
Thealien is offline   Reply With Quote
Old 12-22-2009, 07:52 AM   #19
Thealien
Senior Member
 
Thealien's Avatar
 
Join Date: Jun 2007
Location: USA, East coast
Posts: 2,636
Re: LS engine swap info

Quote:
Originally Posted by Captainfab View Post
Thank you for putting this together. At some point in time I'm sure I will be doing a LS swap, so this will come in handy.

On the motor mount adapter plates there are two drawings, is one of each needed for a swap? No they are just a couple of options. As mentioned below and I will add to the description one puts the engine in the stock location (I believe the longer one) and the other would move the engine forward slightly. Most adapter plates look like the second picture if you click on some of the links

One other source that I know of for wiring, connectors and a lot of other EFI related components is this one. Already have that one, click terminals wire connectors in the wiring link

http://www.eficonnection.com/eficonnection/default.aspx

He does some really cool things like the 24X coil per plug conversion for older EFI engines. Just lots of cool stuff that he does.
Answers in red
Thealien is offline   Reply With Quote
Old 12-22-2009, 07:55 AM   #20
Thealien
Senior Member
 
Thealien's Avatar
 
Join Date: Jun 2007
Location: USA, East coast
Posts: 2,636
Re: LS engine swap info

Quote:
Originally Posted by Super73 View Post
If there are any direct questions that i can help with, please let me know. I've been dealing with LS1's since 2001 and as well as being a moderator here, I am a moderator on LS1tech.com and Performancetrucks.net
Yeah can you help me move or add a couple of posts so all the information stays in the first posts? If not can you have a mod or admin that can contact me?

If you see any inaccuracies or something that should be added I would be happy to change or add as needed

Added your build to the list

Last edited by Thealien; 12-22-2009 at 08:14 AM.
Thealien is offline   Reply With Quote
Old 12-22-2009, 07:12 PM   #21
Thealien
Senior Member
 
Thealien's Avatar
 
Join Date: Jun 2007
Location: USA, East coast
Posts: 2,636
Re: LS engine swap info

Added some links
Thealien is offline   Reply With Quote
Old 12-23-2009, 05:10 PM   #22
echo72
Registered User
 
echo72's Avatar
 
Join Date: Feb 2009
Location: Hampton, GA
Posts: 76
Talking Re: LS engine swap info

Thanks for the info.
__________________
Every day is a challenge. Keep on truckin!
1972 Chevy Cheyenne LWB 350 engine TH400.
echo72 is offline   Reply With Quote
Old 12-23-2009, 05:15 PM   #23
Ackattack
Senior Member
 
Ackattack's Avatar
 
Join Date: Aug 2002
Location: Valley Center KS
Posts: 3,525
Re: LS engine swap info

If you want to do your own computer tuning I suggest HPtuners

You will have to have some tuning done to remove at least the VATS. I would also assume most of us doing swaps will not be running a lot of the emissions equipment, so that can be removed from the tune as well.

Once you get your engine up and running you can also edit other things like the timing and fuel curves (similar to re-jetting your carb and adjusting your distributor for the old schoolers). Additionally, if you run an electronically controlled tranny (ie 4L60E) you can change the shift parameters.

Very usefull tool. But, be careful because if you don't know what you're doing you can blow up your engine or ECM.

Also, this program allows you to monitor all of the sensors the engine is putting out, check and clear Check Engine Lights (DTCs) etc.

Last edited by Ackattack; 12-23-2009 at 05:16 PM.
Ackattack is offline   Reply With Quote
Old 12-23-2009, 06:30 PM   #24
Ticker
Account Suspended
 
Join Date: Oct 2009
Location: Sammamish, WA
Posts: 2,404
Re: LS engine swap info

A couple of quick links to great LS swap articles:

CarCraft LS A-Body Swap Part I

CarCraft LS A-Body Swap Part II

CarCraft LS Swap Accessory Guide
Ticker is offline   Reply With Quote
Old 12-23-2009, 07:08 PM   #25
Critter
Future TOTM Winner
 
Critter's Avatar
 
Join Date: Aug 2006
Location: Bulverde, TX
Posts: 2,691
Re: LS engine swap info

Thanks Thealien! I have a lot of info saved but it is nowhere as complete or this organized. GREAT JOB! Needs to be a sticky for sure!
__________________
72 Chevy CST K5 HIGHLANDER BLAZER Getting a 6.0,NV4500,NP205,14BFF (Currently laying all over the place in little pieces)
72 Chevy swb step-side "LS" 6.0 Here's a build thread of sorts
2002 HD2500 Crew Cab, 8.1L Allison 4x4 Daily Driver

Check it out www.lsdyno.com
Critter 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 12:28 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com