LS2 - LS3 swap - compilation - Chevy Trailblazer SS Forum
 

Go Back   Chevy Trailblazer SS Forum > TBSS Modifications > Trailblazer SS Engine Related Questions/Info

Like Tree1Likes
Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old Aug-23-16, 09:58 PM   #1

Real Name: John
Member # 6881
Join Date: Nov 2009
Status: Offline
Location: Farmersville (Dallas) Tx
Posts: 57
iTrader: (0)
Casino cash: $54200
Like: 8
Liked 0 Times in 0 Posts
Rep Power: Spooled231 is an unknown quantity at this point
Default LS2 - LS3 swap - compilation

Guys

I have been researching quite a bit and found a variance of posts with what changes need to happen of converting from LS2 to LS3. Feel free to add to the list if I miss something or if information is misleading.

Identifying what LS2 components can be reused or use other LS based components to swap over to a LS3

Baseline:
1. Starting with a factory LS2 RWD with no modifications.
2. Swapping over to a stock LS3

Intake:
1. LS2 intake and heads on a LS3 shortblock
2. LS3 intake requires changes to fuel line location (rear to front) and use of LS3 rails and injectors. LS2 fuel connections are on the rear and LS3 is on the front.
3. Use L92 intake and LS2 fuel rails and injectors.
4. LS2 or LS3 throttle body?

Accessories:
1. Use LS2 accessory backet and components. AC, alternator, power steering pump, idler and tensioners, water pump.
2. Use LS3 accessory bracket and components. Requires adapter brackets to use LS2 components.
3. Use L92 water pump?

Oil pan:
1. LS2?
2. C6?
3. LS3?
4. LS2 or LS3 oil dip stick tube?

Exhaust:
1. Able to reuse stock y-pipe and cats from LS2 on which manifolds?
2. LS2 manifolds?
3. LS3 manifolds?

MISC items:
1. Cam sensor on front of LS3. What changes need to happen?
2. Wiring, pigtail or sensor changes?
3. LS2 24 reluctor requires conversion kit.
4. LS2 58 reluctor does not require any changes
5. PCM tune - Find your favorite programmer 😊

Thanks
John Martin
  Reply With Quote
Sponsored Links
Advertisement
 
Old Aug-24-16, 06:22 AM   #2
making friends daily

Real Name: Brandon
Member # 9682
Join Date: Oct 2010
Status: Offline
Location: Auburn, IL
Posts: 9,325
iTrader: (18)
Casino cash: $1216300
Like: 1,989
Liked 2,402 Times in 1,205 Posts
Rep Power: justanotherssuv Gives oral for rep pointsjustanotherssuv Gives oral for rep pointsjustanotherssuv Gives oral for rep pointsjustanotherssuv Gives oral for rep pointsjustanotherssuv Gives oral for rep pointsjustanotherssuv Gives oral for rep pointsjustanotherssuv Gives oral for rep pointsjustanotherssuv Gives oral for rep pointsjustanotherssuv Gives oral for rep pointsjustanotherssuv Gives oral for rep pointsjustanotherssuv Gives oral for rep points
DURAMAX_66
Default

Just out of curiosity, why the change from the 2 to the 3?
__________________
Too much time lost to the abyss this addiction has become..
AWD bolt on record holder 1.581 60' - 7.625 @ 87.77 - 12.114 @ 109.02mph
AWD cam only record holder 1.522 - 7.359 @ 91.29 - 11.71 @ 112.20 mph
  Reply With Quote
Old Aug-24-16, 09:15 AM   #3

Real Name: John
Member # 6881
Join Date: Nov 2009
Status: Offline
Location: Farmersville (Dallas) Tx
Posts: 57
iTrader: (0)
Casino cash: $54200
Like: 8
Liked 0 Times in 0 Posts
Rep Power: Spooled231 is an unknown quantity at this point
Default

Just observing options on a build that we are looking at this time.
  Reply With Quote
 
Old Aug-24-16, 09:19 AM   #4
 
fearnloather's Avatar

Real Name: eric
Member # 6412
Join Date: Sep 2009
Status: Offline
Location: newport news, va
Posts: 935
iTrader: (1)
Casino cash: $221300
Like: 2
Liked 23 Times in 17 Posts
Rep Power: fearnloather will become famous soon enough
Default

there ls's. pretty much anything is interchangeable between them. if putting the ls3 in the tbss. id honestly just drop it in, and tune for it. only things that would require changing are accessories, i.e. brackets and oil pan and if your tbss is an 07+ than you won't need the 24 to 58 cheater box from lingenfelter. now if you got a whole take out ls3 with accessories and all that jazz even freaking better. so you have to modify a fuel line. easy freaking day. pcm of nc has a lot of the components too for that stuff.

c6 pan would be a good way to go and save over the moroso pan, but you will need to give left coast 32 a shout for some goodies to make the c6 pan install smoothly. dip sticks are dip sticks. stick with stock pan than stock dip stick. c6 pan will require c6 dip stick.

stock exhaust will bolt up no issues, aftermarket exhaust will bolt up no issues.

if you are really interested in doing the swap, go to pcm of nc's website, look at their offerings for the ls3/l92 conversions and or get ahold of kelly on here. get ahold of left coast. great guy to deal with and will bend over backwards to help you even if your just asking questions or purchasing one his "kits".
  Reply With Quote
Likes: (1)
Spooled231 (Aug-24-16)
Old Aug-24-16, 12:28 PM   #5

Real Name: John
Member # 6881
Join Date: Nov 2009
Status: Offline
Location: Farmersville (Dallas) Tx
Posts: 57
iTrader: (0)
Casino cash: $54200
Like: 8
Liked 0 Times in 0 Posts
Rep Power: Spooled231 is an unknown quantity at this point
Default

Eric,

All great points that you have mentioned of what will/will not work and who to contact for assistance. This is the purpose of the thread as I have searched and read with information scattered all over the place.
  Reply With Quote
Old Aug-24-16, 07:36 PM   #6
 
inline6's Avatar

Real Name: Bryan
Member # 18739
Join Date: Mar 2013
Status: Online
Location: Baton Rouge
Posts: 5,575
iTrader: (2)
Casino cash: $728305
Like: 466
Liked 1,475 Times in 967 Posts
Rep Power: inline6 is a splendid one to beholdinline6 is a splendid one to beholdinline6 is a splendid one to beholdinline6 is a splendid one to beholdinline6 is a splendid one to beholdinline6 is a splendid one to beholdinline6 is a splendid one to behold
Default

Moroso pan is not that much more at the end of the day. Yes you will have to add a remote filter system but no A/C bracket or special cross members. I also feel it has way better oil control...just my
  Reply With Quote
Old Aug-24-16, 07:56 PM   #7
 
fearnloather's Avatar

Real Name: eric
Member # 6412
Join Date: Sep 2009
Status: Offline
Location: newport news, va
Posts: 935
iTrader: (1)
Casino cash: $221300
Like: 2
Liked 23 Times in 17 Posts
Rep Power: fearnloather will become famous soon enough
Default

well i hope i helped. there are a lot of caveats to some of the stuff too but really depends on what you have to work with and goals.
  Reply With Quote
Old Aug-25-16, 09:44 AM   #8
 
scott750's Avatar

Real Name: Scott
Member # 1626
Join Date: Jan 2008
Status: Offline
Location: Round Rock, Tx
Posts: 4,189
iTrader: (1)
Casino cash: $559168
Like: 858
Liked 363 Times in 250 Posts
Rep Power: scott750 is a name known to allscott750 is a name known to allscott750 is a name known to allscott750 is a name known to allscott750 is a name known to allscott750 is a name known to all
Default

Are the exterior of the ls2 & ls3 blocks relatively the same? Like motor mounts locations, trans bellhousing, accessory mounts on block and heads, etc? Seems the only differences will be all internal. Like could I bolt my ls2 heads to an ls3 block? Stuff like that.
__________________
2008 TBSS Silverstone Metallic 3SS RWD

LT1Z cam | 1 3/4" Kooks w/ catted Y | Phoenix built trans & Billet 258mm 3200 stall | Tim Haines Tuned | PCMofNC (Stock Location CAI, LS7 TB & MAF, Spal efans, front mount Trans Cooler, pickup tube relocate, Wires w/ heat socks) | TR6s | Corsa Sport | HIDs 5000K | Blazer Fogs | Viper 7900 | Pioneer DEH-P4200 | JL 6.5" components, 5.25" coaxials & Stealthbox |
  Reply With Quote
Old Aug-25-16, 09:50 AM   #9
 
inline6's Avatar

Real Name: Bryan
Member # 18739
Join Date: Mar 2013
Status: Online
Location: Baton Rouge
Posts: 5,575
iTrader: (2)
Casino cash: $728305
Like: 466
Liked 1,475 Times in 967 Posts
Rep Power: inline6 is a splendid one to beholdinline6 is a splendid one to beholdinline6 is a splendid one to beholdinline6 is a splendid one to beholdinline6 is a splendid one to beholdinline6 is a splendid one to beholdinline6 is a splendid one to behold
Default

Quote:
Originally Posted by scott750 View Post
Are the exterior of the ls2 & ls3 blocks relatively the same? Like motor mounts locations, trans bellhousing, accessory mounts on block and heads, etc? Seems the only differences will be all internal. Like could I bolt my ls2 heads to an ls3 block? Stuff like that.
Yes you can do that. Yes same bolt hole for almost if not everything.

Last edited by inline6; Aug-25-16 at 09:51 AM.
  Reply With Quote
Old Aug-25-16, 11:10 AM   #10
 
fearnloather's Avatar

Real Name: eric
Member # 6412
Join Date: Sep 2009
Status: Offline
Location: newport news, va
Posts: 935
iTrader: (1)
Casino cash: $221300
Like: 2
Liked 23 Times in 17 Posts
Rep Power: fearnloather will become famous soon enough
Default

yup pretty much identical not counting rotating assy and bore sizing
  Reply With Quote
Old Aug-25-16, 02:08 PM   #11
 
lt1z's Avatar

Real Name: Matt
Member # 64
Join Date: Jun 2007
Status: Offline
Location: Norcal
Posts: 31,467
iTrader: (21)
Casino cash: $2175800
Like: 564
Liked 1,833 Times in 950 Posts
Rep Power: lt1z Gives oral for rep pointslt1z Gives oral for rep pointslt1z Gives oral for rep pointslt1z Gives oral for rep pointslt1z Gives oral for rep pointslt1z Gives oral for rep pointslt1z Gives oral for rep pointslt1z Gives oral for rep pointslt1z Gives oral for rep pointslt1z Gives oral for rep pointslt1z Gives oral for rep points
Default

An LS3 is a simple swap into an 07-09 TBSS. All your sensors will plug right in. You just need an L92 manifold and rails
Bankster71 likes this.
__________________
C6 M6 Vortech 857/725
14' GMC RCSB TVS1900
gpxtuning@gmail.com
  Reply With Quote
Likes: (1)
epix (Nov-18-16)
Old Aug-25-16, 08:47 PM   #12

Real Name: Byron
Member # 31753
Join Date: Dec 2014
Status: Offline
Location: des plaines il
Posts: 19
iTrader: (0)
Casino cash: $56100
Like: 1
Liked 0 Times in 0 Posts
Rep Power: CrazyR1 is an unknown quantity at this point
Default

Awsome post. Currently doing an ls3 swap into my 06 awd. Picked up a Chevy performance ls3 525 hp complete motor. I know I need to swap my oil pan , get the lingenfelter conversion box and get the l92 truck intake to use my wp and accessories can't wait to get it running
  Reply With Quote
Old Aug-29-16, 10:51 AM   #13
 
jackball60's Avatar

Real Name: Jimmy
Member # 50361
Join Date: May 2016
Status: Offline
Location: Kansas
Posts: 82
iTrader: (0)
Casino cash: $72704
Like: 5
Liked 4 Times in 3 Posts
Rep Power: jackball60 is an unknown quantity at this point
Default

Quote:
Originally Posted by Spooled231 View Post
Guys

I have been researching quite a bit and found a variance of posts with what changes need to happen of converting from LS2 to LS3. Feel free to add to the list if I miss something or if information is misleading.

Identifying what LS2 components can be reused or use other LS based components to swap over to a LS3

Baseline:
1. Starting with a factory LS2 RWD with no modifications.
2. Swapping over to a stock LS3

Intake:
1. LS2 intake and heads on a LS3 shortblock
2. LS3 intake requires changes to fuel line location (rear to front) and use of LS3 rails and injectors. LS2 fuel connections are on the rear and LS3 is on the front.
3. Use L92 intake and LS2 fuel rails and injectors.
4. LS2 or LS3 throttle body?

Accessories:
1. Use LS2 accessory backet and components. AC, alternator, power steering pump, idler and tensioners, water pump.
2. Use LS3 accessory bracket and components. Requires adapter brackets to use LS2 components.
3. Use L92 water pump?

Oil pan:
1. LS2?
2. C6?
3. LS3?
4. LS2 or LS3 oil dip stick tube?

Exhaust:
1. Able to reuse stock y-pipe and cats from LS2 on which manifolds?
2. LS2 manifolds?
3. LS3 manifolds?

MISC items:
1. Cam sensor on front of LS3. What changes need to happen?
2. Wiring, pigtail or sensor changes?
3. LS2 24 reluctor requires conversion kit.
4. LS2 58 reluctor does not require any changes
5. PCM tune - Find your favorite programmer 😊

Thanks
John Martin
Much needed info. Thank you
  Reply With Quote
Old Nov-18-16, 08:46 AM   #14

Real Name: Vic
Member # 18415
Join Date: Jan 2013
Status: Offline
Location: Uxbridge, MA
Posts: 41
iTrader: (0)
Casino cash: $57000
Like: 0
Liked 0 Times in 0 Posts
Rep Power: sicvic is an unknown quantity at this point
Default

I'm doing an LS3 into an '06 RWD conversion (because my LS2 is complete junk inside). I have the C6 pan and Left Coast crossmember. Guy at Summit says because I have a tan/beige (not black) engine-side connector for the reluctor, it's a 58x and I'm all set. True? As a side note, he has gotten longevity complaints with the Lingenfelter reluctor conversion unit.

Also, can I use the LS3 intake and throttle body? Both mine and the LS3 have 6-pin connectors for the throttle body. My throttle body is a 4-bolt unit. I would like to go with the LS3 intake and throttle body, since that's no doubt where some of the extra hp and tq comes from.

Thanks.
  Reply With Quote
Old Nov-18-16, 09:03 AM   #15
 
epix's Avatar

Real Name: Peter
Member # 4418
Join Date: Jan 2009
Status: Online
Location: SW MI
Posts: 338
iTrader: (3)
Casino cash: $152290
Like: 17
Liked 10 Times in 8 Posts
Rep Power: epix is on a distinguished road
Default

Quote:
Originally Posted by sicvic View Post
I'm doing an LS3 into an '06 RWD conversion (because my LS2 is complete junk inside). I have the C6 pan and Left Coast crossmember. Guy at Summit says because I have a tan/beige (not black) engine-side connector for the reluctor, it's a 58x and I'm all set. True? As a side note, he has gotten longevity complaints with the Lingenfelter reluctor conversion unit.

Also, can I use the LS3 intake and throttle body? Both mine and the LS3 have 6-pin connectors for the throttle body. My throttle body is a 4-bolt unit. I would like to go with the LS3 intake and throttle body, since that's no doubt where some of the extra hp and tq comes from.

Thanks.
If you use the LS3 intake/LS3 TB I *think* you'll also need to use the car drive accessories or use some type of bracket adapter.

It's been posted before that the L92 intake outperforms the LS3 intake so take that into consideration. L92 injectors are different than the LS3 injectors but you can use LS3 injectors on the L92 intake (using TBSS rails with spacers). I ended up using this combo on my LS3 swap: L92 Intake, TBSS TB, TBSS Fuel Rails, LS3 OEM injectors, FAST injector spacers, LS7 MAF, LS3 MAP Sensor, LS3/LS7 MAF to LS2 Harness Adapter

http://ls1tech.com/forums/generation...omparison.html

http://ls1tech.com/forums/generation...s3-intake.html
__________________
'07 AWD 3SS - 416 LS3, Lingenfelter CNC Heads, Trickflow Cam, Nitrous, typical bolt-ons.
'92 GMC Typhoon - Not Stock, '98 Jeep Cherokee - 6" Lift, '86 Subaru Brat, '42 Plymouth Coupe - All Original, Ural Sidecar Motorcycle

Last edited by epix; Nov-18-16 at 09:16 AM.
  Reply With Quote
Old Nov-18-16, 02:40 PM   #16
 
ScarabEpic22's Avatar

Real Name: Erik
Member # 966
Join Date: Oct 2007
Status: Offline
Location: Seattle, WA
Posts: 3,224
iTrader: (4)
Casino cash: $488540
Like: 16
Liked 147 Times in 107 Posts
Rep Power: ScarabEpic22 is a name known to allScarabEpic22 is a name known to allScarabEpic22 is a name known to allScarabEpic22 is a name known to allScarabEpic22 is a name known to allScarabEpic22 is a name known to all
Default

Unless your ECM is an E67, you have a 24x engine now and either need the LPE box or to pull the crank and have the 58x reluctor installed. Cam reluctor needs to be swapped too.

LS3 car intake isnt better than the truck manifold on our vehicles, they give up some TQ down low for a few HP up top. Better off with a L92 truck intake manifold. If you already have the LS3 and want to keep it, can use the LS3 gold blade tb too. Easiest way to run truck accessories on LS3 car intake is to use PCMofNC's kit, about $31.

For the ECM check:
E40: 1 big, 2 small connectors
E67: 2 big, 1 small connectors
__________________
13 Sonic RS CGM M6, mods...
08 3SS AWD, bolt-ons, suspension, FR 20x10, SE22 Performance tuned
02 TB LT 4WD, 3" lift, modded, tuned
  Reply With Quote
Old Dec-23-16, 10:22 AM   #17

Real Name: Vic
Member # 18415
Join Date: Jan 2013
Status: Offline
Location: Uxbridge, MA
Posts: 41
iTrader: (0)
Casino cash: $57000
Like: 0
Liked 0 Times in 0 Posts
Rep Power: sicvic is an unknown quantity at this point
Default

Update on my swap:

I'm using everything from the LS3 crate motor just to make the swap go more smoothly. and to avoid any warranty issues. I can always swap intakes down the road. I got the Car Intake Conversion Pulley Kit from PCM of NC ($31.00). They also sent me an upper radiator hose conversion kit (consisting of two hoses with an aluminum coupler that goes in between them, and some large shrink-wrap) ($50.00). This enables me to use the LS3 water pump, which has the top outlet in a different position. The bottom water pump outlet is the same as the TBSS. I'll need a 160mm-longer accessory drive belt, which PCM identifies as a 6PK2525.

Next issue:

The high-pressure power steeering hose. I know I'm getting a late-model Camaro hose and using the front portion, and retaining the rear portion of mine. Both will need to be cut somewhere in the middle and then welded back together. I will probably buy a new Camaro hose from a dealer. What year(s) should I ask for?
  Reply With Quote
Old Jan-06-17, 07:56 AM   #18

Real Name: Vic
Member # 18415
Join Date: Jan 2013
Status: Offline
Location: Uxbridge, MA
Posts: 41
iTrader: (0)
Casino cash: $57000
Like: 0
Liked 0 Times in 0 Posts
Rep Power: sicvic is an unknown quantity at this point
Default

I'm still in need of a bit more help here, please and thank you! The LS3 is in the truck and hooked up. I was hoping to use the LS3 water pump and pulleys. However, the crate motor crank damper/pulley and water pump pulley sit very close to the motor, while the TBDS accessory pulleys sit much further forward. I bought an adapter from PCM of NC, but that doesn't come close to addressing all the issues. Mark from TBSS believes that GM shipped me a Corvette damper and water pump, since the Camaro damper and water pump sit the same distance from the block as the TBSS ones. True? Should I just buy a new TBSS water pump and damper?

The other issue is that my mechanic says the A/C bracket will not bolt to the front corner of the C6 oil pan like it did on the TBSS pan, so there's no way to attach the A/C compressor. Mark from PCM of NC says that someone makes a bracket to address this. Anyone?
  Reply With Quote
Old Jan-06-17, 08:42 AM   #19
 
jsmith2043's Avatar

Real Name: Joe
Member # 18168
Join Date: Dec 2012
Status: Offline
Location: Charlotte, NC
Posts: 1,207
iTrader: (0)
Casino cash: $269705
Like: 298
Liked 421 Times in 225 Posts
Rep Power: jsmith2043 is a splendid one to beholdjsmith2043 is a splendid one to beholdjsmith2043 is a splendid one to beholdjsmith2043 is a splendid one to beholdjsmith2043 is a splendid one to beholdjsmith2043 is a splendid one to beholdjsmith2043 is a splendid one to behold
Default

LC32 has this bracket I believe. user name ...Left Coast '32

Last edited by jsmith2043; Jan-06-17 at 08:44 AM.
  Reply With Quote
Old Jan-06-17, 08:45 AM   #20
 
inline6's Avatar

Real Name: Bryan
Member # 18739
Join Date: Mar 2013
Status: Online
Location: Baton Rouge
Posts: 5,575
iTrader: (2)
Casino cash: $728305
Like: 466
Liked 1,475 Times in 967 Posts
Rep Power: inline6 is a splendid one to beholdinline6 is a splendid one to beholdinline6 is a splendid one to beholdinline6 is a splendid one to beholdinline6 is a splendid one to beholdinline6 is a splendid one to beholdinline6 is a splendid one to behold
Default

For the AC bracket Joe from LC32 does good guy and good service.
  Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.1.0

All times are GMT -7. The time now is 09:26 AM.

 
Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.1
vB.Sponsors
Copyright 2007-2015 Tony Lukezic