LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

My LS3 Swap

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Old Jan 4, 2011 | 01:19 PM
  #101  
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Car: 89 IROC-Z
Engine: 6.2 LS3
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Re: My LS3 Swap

nick i couldnt locate the thread you were talking about "peg/pedals" but sont i just need to get a peg from the 4th pedals or is there something cheaper another alternative?
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Old Jan 4, 2011 | 05:47 PM
  #102  
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Re: My LS3 Swap

Here's the thread, I think I used the term "pin" not "peg" which might have made it difficult to find.


This is about a $3.00 fix.

https://www.thirdgen.org/forums/ltx-...e-4th-gen.html
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Old Jan 7, 2011 | 11:23 AM
  #103  
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Car: 89 IROC-Z
Engine: 6.2 LS3
Transmission: MN12 T56 GTO
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Re: My LS3 Swap

Originally Posted by BlueZee28
Here's the thread, I think I used the term "pin" not "peg" which might have made it difficult to find.


This is about a $3.00 fix.

https://www.thirdgen.org/forums/ltx-...e-4th-gen.html
Thanks Nick,

pedals installed and some pics with the rail cover installed also.

pic from a camera phone crappy quality
Attached Thumbnails My LS3 Swap-001.jpg   My LS3 Swap-003.jpg   My LS3 Swap-006.jpg  
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Old Jan 7, 2011 | 04:34 PM
  #104  
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Re: My LS3 Swap

Let me know what u use for the high pressure power steering hose.
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Old Jan 7, 2011 | 06:14 PM
  #105  
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Re: My LS3 Swap

You can use a factory 4th gen hose. www.rockauto.com has them for around $25 if I remember correctly.
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Old Jan 7, 2011 | 06:26 PM
  #106  
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Re: My LS3 Swap

That's what I have now. They dont fit the c6 acc. Drive like he is running.

Last edited by timmyboy; Jan 9, 2011 at 09:25 PM. Reason: typo
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Old Jan 9, 2011 | 10:28 AM
  #107  
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Re: My LS3 Swap

Originally Posted by timmyboy
That's what I have now. They front fit the c6 acc. Drive like he is running.
If I recall corectly ALAN another member with a ls3 has the same build as us an used an 09 c6 line and just a lil tweaking pulled it off
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Old Jan 9, 2011 | 09:27 PM
  #108  
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Re: My LS3 Swap

Originally Posted by JSACRA
If I recall corectly ALAN another member with a ls3 has the same build as us an used an 09 c6 line and just a lil tweaking pulled it off
Let me know how it works for you. I used a fourth gen hose but was not happy with the modifications i had to perform. Or the look.
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Old Feb 1, 2011 | 02:06 PM
  #109  
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Re: My LS3 Swap

seem like everyone is making the own radiator support piece for the top well i made one too. the reason for this is that the 06 gto k&n cai hits where the stock radiator hose support is modified the stock piece (organally dual fan set up)

Last edited by JSACRA; Mar 19, 2011 at 06:47 PM.
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Old Mar 2, 2011 | 05:29 PM
  #110  
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Re: My LS3 Swap

So I know the appeal of using the Erod package in a CA car is for smog compliance. Since it is an LS3 designed for swap applications how do they address the exhaust manifolds and catalytic converter requirements CA has? In order to get an E.O. number the erod has to have been certified with a specific set of parts. Do those actually work in a third gen?
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Old Mar 2, 2011 | 05:33 PM
  #111  
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Re: My LS3 Swap

Originally Posted by Matt_91RSTPI
So I know the appeal of using the Erod package in a CA car is for smog compliance. Since it is an LS3 designed for swap applications how do they address the exhaust manifolds and catalytic converter requirements CA has? In order to get an E.O. number the erod has to have been certified with a specific set of parts. Do those actually work in a third gen?

I believe it does, the one concern is the cross member, but hawks sells the cross member that allows clearance...
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Old Mar 8, 2011 | 01:15 PM
  #112  
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Re: My LS3 Swap

as far as the center dumps origanlly equipped on the ls3, no those dont work, i tried to get them to work but w/o a tubular k-member theres no way to get them to work

but whenu purchase the erod crate engine u also get a pair of 2010 camaro exhaust manifolds on the side, now those do work, the driver side so far no problem but the collector on the passenger side needed to be tweak a little (will get some pic later)

im still tinckering with the exhaust for now, no money for hawks lt at the moment but will get them later down the road (even thought im in cali).

the crossmember is cut and now welded up to to clear the vette oil pan

thats all for the moment
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Old Mar 8, 2011 | 01:16 PM
  #113  
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Re: My LS3 Swap

it has a e.o. number for cali so noprob there

Last edited by JSACRA; Mar 19, 2011 at 06:48 PM.
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Old Mar 8, 2011 | 02:10 PM
  #114  
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Re: My LS3 Swap

Originally Posted by JSACRA
the top radiator cover has some rough spots but got the smoothed out now
your my hero, i am pretty sure on doing this in a couple years...could you make a parts list? with prices if its not too much too ask
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Old Mar 10, 2011 | 09:18 PM
  #115  
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Re: My LS3 Swap

Originally Posted by 91Firebug
your my hero, i am pretty sure on doing this in a couple years...could you make a parts list? with prices if its not too much too ask
see what i can do but im not done buying parts so the list is going to grow

but for now motors back in and wiring has started. the power sterring is done half to get a pic for tommy boy on the psteering. u might not like it tommyboy im not really to happy with the look of it. so i might try to do something a little different.

Last edited by JSACRA; Mar 19, 2011 at 06:49 PM.
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Old Mar 11, 2011 | 07:44 AM
  #116  
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Re: My LS3 Swap

will see :-)
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Old Mar 11, 2011 | 04:15 PM
  #117  
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Re: My LS3 Swap

As far as a power steering hose, you can take it to any company that makes hydraulic hoses. (Hose power, Master hose, Hydro builders, etc.) As long as you have an example of the correct fittings they can make it for you for between $25 to $50. I had hose power make mine out of stainless braided for $60. (They charge more for ss braided.) Took them about 10 min to swedge the ends on the hose for me. If you get stuck looking for a place to make them, call hertz equipment rental in your area (Or any other heavy equipment rental company, such as H&E, sunbelt, etc.) and ask where they get their hydraulic hoses made. They shouldnt have any problem telling you this info.
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Old Mar 19, 2011 | 06:51 PM
  #118  
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Re: My LS3 Swap

Originally Posted by drknow90rs_ss@y
As far as a power steering hose, you can take it to any company that makes hydraulic hoses. (Hose power, Master hose, Hydro builders, etc.) As long as you have an example of the correct fittings they can make it for you for between $25 to $50. I had hose power make mine out of stainless braided for $60. (They charge more for ss braided.) Took them about 10 min to swedge the ends on the hose for me. If you get stuck looking for a place to make them, call hertz equipment rental in your area (Or any other heavy equipment rental company, such as H&E, sunbelt, etc.) and ask where they get their hydraulic hoses made. They shouldnt have any problem telling you this info.
yeah ima change the p. steering lines timmy boy what did u do for urs? pic?
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Old Mar 20, 2011 | 10:33 AM
  #119  
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Re: My LS3 Swap

I used a fourth gen camaro hose. But this is one thing i will change. I had to modify it pretty good to get it to fit. But for how much care i took into making the engine look "at home" Im not happy with it at all. I tried to get a custom hose made up but i had a hard time finding someone who could make one. I will find someone who can.
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Old Mar 23, 2011 | 01:03 PM
  #120  
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Re: My LS3 Swap

(gotta get a better camera, taking my pics with a camera phone and not as good quality)

quick update:

1. had the aluminum driveshaft cut an balanced(car been lowered quiet a bit its was pushing the yoke too far into the trans)

2. swap out the fuel pump for a high-flo walbro pump

3.not to sure if this matter or not, but on installation of the ecu(putting it in the same location as the stock tpi ecu, under the dash/passenger side)
i figured i replace the heater core i wasnt too sure if there might have been any deposits or anything left from the old tpi engine, and i didnt want it to circulate into the new engine so went ahead and change it.

4.starting on the wiring.
Attached Thumbnails My LS3 Swap-img_0415.jpg  
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Old Mar 23, 2011 | 01:57 PM
  #121  
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Re: My LS3 Swap

Over on LS1tech you mentioned that you looked for a GTO t56 specifically. What was your reasoning for that over an f-body LS1 t56?
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Old Mar 23, 2011 | 09:07 PM
  #122  
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Car: 89 IROC-Z
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Re: My LS3 Swap

Originally Posted by scooter
Over on LS1tech you mentioned that you looked for a GTO t56 specifically. What was your reasoning for that over an f-body LS1 t56?
The gto has double/triple cone syncros an the fbody has single/double the gto has lowered 1-3 gear as the fbodys are not as tall

1st 2nd 3rd 4th 5th 6th R
gto.......2.97 2.07 1.43 1.00 .84 .56 2.90
fbody....2.66 1.78 1.30 1.00 .74 .50 2.90
2.66:11.78:11.30:11.00:10.74:10.50:12.90:1



I've heard the gto has a little more strenght but not to sure

Last edited by JSACRA; Mar 24, 2011 at 12:21 PM.
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Old Mar 27, 2011 | 06:16 PM
  #123  
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Re: My LS3 Swap

1. the dbw throttle, the wire were routed using the exsiting hole were the the previous throttle cable came threw for the tpi engine.

2. nothing to do with the swap, but i took some pics of the 2011 ZR1. dont see to many of these running around and the just happened to haveone at the chevrolt dealership.
Attached Thumbnails My LS3 Swap-img_0426.jpg   My LS3 Swap-img_0408.jpg  
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Old Mar 27, 2011 | 08:46 PM
  #124  
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Re: My LS3 Swap

Looks good. Sweet Vette too!
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Old Mar 30, 2011 | 10:45 AM
  #125  
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Re: My LS3 Swap

Originally Posted by JSACRA
but whenu purchase the erod crate engine u also get a pair of 2010 camaro exhaust manifolds on the side, now those do work, the driver side so far no problem but the collector on the passenger side needed to be tweak a little (will get some pic later)
Could you get a picture of the tweak you did to the 2010 manifolds? I have a chance to score a set, of practically brand new ones, for very cheap. However, I want to make sure they will fit before doing that.
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Old Apr 7, 2011 | 08:59 PM
  #126  
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Axle/Gears: 3.73
Re: My LS3 Swap

Originally Posted by Drkhrse89
Could you get a picture of the tweak you did to the 2010 manifolds? I have a chance to score a set, of practically brand new ones, for very cheap. However, I want to make sure they will fit before doing that.
ill try to get one as soon as i can but they'll fit the only prob is the passenger side need a little tweaking

but heres some updates
-need help with exhaust went to my buddies
-powersteering not tohappy with but will change later
-went with black fitting and black nylon fuel lines not to crazy about stell braided or red/blue fitting
-crappy pics from iphone agian will get better camera once it all cleaned up and complete
-the upper radiator hose fits perfect for later style ls water pumps with the water neck on the driver side(2007-earlier have water neck more towards passanger side) hose is a gates
Attached Thumbnails My LS3 Swap-img_0428.jpg   My LS3 Swap-img_0436.jpg  
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Old Apr 7, 2011 | 09:02 PM
  #127  
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Re: My LS3 Swap

the old tpi had a leaking front seal so its a little dirty underneath but im on it wont stay that way for long!
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Old Apr 10, 2011 | 04:28 PM
  #128  
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Re: My LS3 Swap

What's the PN for the upper gates hose?
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Old Apr 19, 2011 | 05:07 PM
  #129  
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Re: My LS3 Swap

Originally Posted by Iroc'nthe87
What's the PN for the upper gates hose?
ill get the pn for you.'

big update
FIRST START UP YESTERDAY!! STILL WORKING ON THE FINISHING TOUCHES
-bought a ac delete dash from memeber jstoltz(thanks again) that i will soon be installing.
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Old Apr 19, 2011 | 06:08 PM
  #130  
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Re: My LS3 Swap

Congrats on the first start!
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Old Apr 25, 2011 | 08:06 PM
  #131  
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Re: My LS3 Swap

Originally Posted by cprmn14
Congrats on the first start!
hey thanks man

fuel
gotta change the bolt on the horn (lost the nice one)
the air filter in the pic is the one inthe package but ima change it to a k&n one later
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Old Apr 25, 2011 | 08:09 PM
  #132  
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Re: My LS3 Swap

i copied timmy boy

i went with all black fittings and black hose instead of steel braided
Attached Thumbnails My LS3 Swap-img_0062.jpg  
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Old Apr 25, 2011 | 08:32 PM
  #133  
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Re: My LS3 Swap

Originally Posted by JSACRA
the shifter cup i did order and the mgw short shift. i ordered the mgw cuz i read alot of good things from ls1 tech about it and figured id give it a try, and the customer service was great it should be shipping out on 12/06 i order it on friday. a link to the shifter

http://www.mgwltd.com/camaro_short_throw_shifter.shtml
They have another one specifically for the 2010 Camaro but it is like 350 friggen bucks. Just curious if this sort of thing is worth it. Or if it is even an option depending with the t56 you went with. Just curious.

Last edited by last_; Apr 25, 2011 at 08:38 PM.
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Old Apr 25, 2011 | 08:34 PM
  #134  
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Re: My LS3 Swap

Originally Posted by JSACRA
i copied timmy boy

i went with all black fittings and black hose instead of steel braided

Man. That set up looks real familiar . Lol thats the point of these forums.

Last edited by five7kid; Apr 25, 2011 at 10:55 PM.
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Old Apr 26, 2011 | 02:00 AM
  #135  
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Re: My LS3 Swap

sub
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Old Apr 28, 2011 | 02:01 PM
  #136  
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Re: My LS3 Swap

Originally Posted by last_
They have another one specifically for the 2010 Camaro but it is like 350 friggen bucks. Just curious if this sort of thing is worth it. Or if it is even an option depending with the t56 you went with. Just curious.
mine was not that much but around 220 i believe, as far as being worth it i have not got the chance to drive it that much being at the exhaust shop and im still waiting to swap the dash out. after the the intial break in of the engine and ill be a little more willing to get on the gas but im being causious now ill let u know a lil down the road
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Old Apr 28, 2011 | 02:11 PM
  #137  
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Re: My LS3 Swap

Originally Posted by JSACRA
mine was not that much but around 220 i believe, as far as being worth it i have not got the chance to drive it that much being at the exhaust shop and im still waiting to swap the dash out. after the the intial break in of the engine and ill be a little more willing to get on the gas but im being causious now ill let u know a lil down the road
Cool, good call on taking it easy to let the engine tolerances settle in. Lemme know what you think about the short throw if you remember next month or somethin.
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Old Apr 28, 2011 | 04:03 PM
  #138  
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Re: My LS3 Swap

Ever get that part number for the gates upper rad hose?
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Old May 5, 2011 | 05:12 PM
  #139  
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Re: My LS3 Swap

Super clean build you´ve got there. I just love those black fuel fittings and hoses. .
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Old May 10, 2011 | 10:10 PM
  #140  
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Re: My LS3 Swap

Originally Posted by Iroc'nthe87
Ever get that part number for the gates upper rad hose?
Originally Posted by robbe_iroc
Super clean build you´ve got there. I just love those black fuel fittings and hoses. .
gates 21837 but its for the '08 and later water pumps the coolant neck is closer to the driver side the '07 andearlier are closer to the passanger side like the ls1's

for the lower hose iused the 98-02 f body hose

send the cai to get it powdercoated but she's running (crappy cell phone pick)
Attached Thumbnails My LS3 Swap-img_0103.jpg  
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Old May 11, 2011 | 03:28 PM
  #141  
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Axle/Gears: 4:th gen Auburn with 3:73
Re: My LS3 Swap

Congratulations to a super clean build. I´ll try to start mine tomorrow again. We have found one electrical bug (we think)
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Old May 11, 2011 | 04:29 PM
  #142  
90-irocdx3's Avatar
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From: santa barbara,ca
Car: 1990 iroc z
Engine: LSX 376 F1A
Transmission: 4l60e
Axle/Gears: 12 bolt 3.42
Re: My LS3 Swap

Congrats on getting the car alive, i just got my iroc running too. Are you going to dyno the car?
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Old Jun 10, 2011 | 09:24 AM
  #143  
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Re: My LS3 Swap

Originally Posted by JSACRA
not at the moment when the motor comes out to weld it i will take some. i cut it for clearance for the oil pan and dont have the money for the tubular k-member. i didnt want to buy just the k-member and waste money and have to buy one later, my plan was to go with the coil over set-up and at 1400 bucks i just dont have it now. so i didnt want to buy one for the stock set-up and later have to buy another.
I am doing an LS376 into a 91 Camaro and am very interested as to what oil pan or what cutting of the k-member was done, any help here would be great.
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Old Nov 8, 2011 | 08:23 PM
  #144  
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From: fresno ca
Car: 89 IROC-Z
Engine: 6.2 LS3
Transmission: MN12 T56 GTO
Axle/Gears: 3.73
Re: My LS3 Swap

Originally Posted by 91RSLS376
I am doing an LS376 into a 91 Camaro and am very interested as to what oil pan or what cutting of the k-member was done, any help here would be great.
the k-member if keeping factory piece must but notched not to much to clear the step in the oil pan not to bad

i know its been awhile since iposted on my swap, but just a update and some suggest parts i have found that may interest alot of u lsx swappers.

first the update
-i did have it dyno a couple of months ago and cant seem to fing the graphs i had but the hp was 379.76 rwhp

the stock 10 bolt is now broke time for a 9in or 12 bolt -spike iroc just might have give mwc a call that housing looks badass.

alot of u have the heater coolant lines sitting on the corvette coil cover or something to that effect but i boughts these not to long ago i really like i will have to get a pic of them installed but the part numbers

pn 28471, 28479 theyre both gate hoses that have a 90* bent to let u hide them a lil better
Attached Thumbnails My LS3 Swap-059.jpg   My LS3 Swap-28479-1.jpg  
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Old Nov 8, 2011 | 08:25 PM
  #145  
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From: fresno ca
Car: 89 IROC-Z
Engine: 6.2 LS3
Transmission: MN12 T56 GTO
Axle/Gears: 3.73
Re: My LS3 Swap

they do have longer hoses these are 36in long i believe the other are another 12-18inches
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Old Nov 8, 2011 | 09:53 PM
  #146  
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From: Madison, SD
Car: 91 RS Convertible
Engine: LSA
Transmission: 6060
Axle/Gears: 373
Re: My LS3 Swap

What was the part number of the front accessory drive you used. Was it a corvette or cad cts system
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Old Nov 8, 2011 | 10:46 PM
  #147  
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From: fresno ca
Car: 89 IROC-Z
Engine: 6.2 LS3
Transmission: MN12 T56 GTO
Axle/Gears: 3.73
Re: My LS3 Swap

Originally Posted by porkenstein
What was the part number of the front accessory drive you used. Was it a corvette or cad cts system
got the from pace performance w/o ac u can get them with ac thought there the c6 vette 19155167 that the pn w/o ac though it went up quite a bit since i got mine it was around 400
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Old Nov 9, 2011 | 03:52 PM
  #148  
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From: San Jose, CA
Re: My LS3 Swap

How did you finish up your exhaust/y-pipe? Any pics?
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Old Nov 9, 2011 | 07:53 PM
  #149  
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From: fresno ca
Car: 89 IROC-Z
Engine: 6.2 LS3
Transmission: MN12 T56 GTO
Axle/Gears: 3.73
Re: My LS3 Swap

Originally Posted by Matt_91RSTPI
How did you finish up your exhaust/y-pipe? Any pics?
i knew i was forgotten something yesterday i ended making a threw pipe so i remove the cats and install them at the time of smog (excuse the bad pics there all from a camera phone) im still using the exhaust manifolds had not bought headers do to the fact ive been realling considering a turbo for the forced induction ,and considering a flowmaster y-pipe for a cleaner look
Attached Thumbnails My LS3 Swap-img_0242.jpg  
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Old Nov 9, 2011 | 10:17 PM
  #150  
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From: Wyoming
Car: 1995 Formula
Engine: LT1 350
Transmission: Built 4L60e
Axle/Gears: 10 bolt, Eaton posi, 3.73's
Re: My LS3 Swap

For my LT1 swap, I cut out a hole in the driver's side battery tray, and I am bolting an aluminum plate with a 3.5" tube welded onto it, and I am running the filter right underneath the battery tray so it'll get cooler air than what's in the engine bay.

I got an Air Force aluminum throttle body elbow off ebay for like $49 (this is the cheapest aluminum elbow I could find) and just bought the aluminum intake tubing separately. I'm using a silicone coupler on the tube on the battery tray plate, so I can adjust the small 45 degree elbow that will be fastened onto it, so the intake tube from the throttle body will mesh with it, then I'll just tighten it down and voila!!

It should work very nicely. Wish I had a pic of it all completed, but my engine still isn't built yet. Here's a pic of my foamboard template for the aluminum battery tray plate and then another pic of my original idea with the smaller plate with tube. I decided to go with a bigger plate that will hide all the holes in the battery tray and will look cleaner:

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Name:  Airintake2.jpg
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Originally Posted by JSACRA
what do u guys reccommend for a cold air intake set up. dont want to use the old tpi air box (too restritive).

Last edited by New2Chevy; Nov 9, 2011 at 10:23 PM.
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