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.

92 Z28 LSx/ T56 swap from IrocBoost

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Old Nov 7, 2012 | 11:06 AM
  #1  
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From: Va beach
Car: 87 IROC,
Engine: 370 LSx With Boost
Transmission: 4L80E
Axle/Gears: S-60 with 3.50s
92 Z28 LSx/ T56 swap from IrocBoost

Since a few people have asked what my latest project I was working on I figured I'd make a thread with my progress.

I parted out/ am parting out the 91 RS I had that was LS1 T56 swapped. I got the car swapped and was having to replace and re-do everything because of the hack job the swap was and the body being worn out I decided to search for a new car to build.







After driving it a bit I relized the car was floating real bad so I got under and found EVERY endlink rusted shut and all the rubber bushings gone. Struts where blown. A few other odds and ends. So after the following...
SPohn front and rear sway bar
Adj Panhard bar
2" lowering springs
New struts
J&M Strut towers
C5 brake conversion
and a nifty set of cheap wheels...

This is where it sits now. Feels like a new car BTW:


Now I have most of the swap things still left over from the other car and aquaired another LQ4 motor and T56 trans. So a cammed LQ4 and a T56 wil be in the near future for this. Would like to get a buyer for the motor and trans in the car though beofre I tear apart a good running car. More updates to follow!

Last edited by Grifter757; Jun 13, 2013 at 05:31 PM.
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Old Nov 7, 2012 | 12:30 PM
  #2  
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From: Houston, Texas
Car: 1986 Camaro
Engine: LS6
Transmission: Tick Stage 2 T56
Axle/Gears: Moser 12 Bolt
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Wow! Way to go with the buy!
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Old Nov 8, 2012 | 09:14 AM
  #3  
Zach/90\irocZ's Avatar
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From: San Diego, California For Now
Car: 88 Formula, 90 Iroc RIP, 92 RS Sold
Engine: 305 to 350
Transmission: 700r4
Axle/Gears: 10 Bolt
Re: 92 Z28 LSx/ T56 swap from IrocBoost

what wheels are those ?kinda looks like mines im running what are the sizes... planning to change interior or staying tan imo tans get dirty way to quick lol but look nice not a bad find for 800 tho i still got along way to go for mines
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Old Nov 9, 2012 | 08:39 AM
  #4  
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From: Va beach
Car: 87 IROC,
Engine: 370 LSx With Boost
Transmission: 4L80E
Axle/Gears: S-60 with 3.50s
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Originally Posted by Zach/90\irocZ
what wheels are those ?kinda looks like mines im running what are the sizes... planning to change interior or staying tan imo tans get dirty way to quick lol but look nice not a bad find for 800 tho i still got along way to go for mines
THey are the same wheels you have, XXR something number.

Going with black interior once I can get some carpet.
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Old Nov 9, 2012 | 09:22 AM
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Zach/90\irocZ's Avatar
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Car: 88 Formula, 90 Iroc RIP, 92 RS Sold
Engine: 305 to 350
Transmission: 700r4
Axle/Gears: 10 Bolt
Re: 92 Z28 LSx/ T56 swap from IrocBoost

lol your going turbo for this setup or keep it n/a
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Old Nov 9, 2012 | 09:25 AM
  #6  
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From: Va beach
Car: 87 IROC,
Engine: 370 LSx With Boost
Transmission: 4L80E
Axle/Gears: S-60 with 3.50s
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Originally Posted by Zach/90\irocZ
lol your going turbo for this setup or keep it n/a
I really though about turboing this one also as I have enough stuff to turbo this one also... But I decided to do just a cam and maybe some L92 heads later down the line.
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Old Nov 9, 2012 | 09:41 AM
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From: Tampa, FL, USA
Car: 93 240SX
Engine: LQ9
Transmission: T56
Axle/Gears: 3.54 R200 IRS
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Shame on modding such a rare car, but i'm sure it'll be nice.
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Old Nov 9, 2012 | 09:47 AM
  #8  
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Car: 88 Formula, 90 Iroc RIP, 92 RS Sold
Engine: 305 to 350
Transmission: 700r4
Axle/Gears: 10 Bolt
Re: 92 Z28 LSx/ T56 swap from IrocBoost

yea im comtemplating between turbo maggie or just do n/a with just cam and tune and maybe port polish heads my issue is that i drive mines everday rain or shine lol i was looking into a lQ9 but around here in san diego there charging over 1000-1500+ on a block havent found good deal on that
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Old Nov 9, 2012 | 01:13 PM
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From: Va beach
Car: 87 IROC,
Engine: 370 LSx With Boost
Transmission: 4L80E
Axle/Gears: S-60 with 3.50s
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Originally Posted by Z28ricer
Shame on modding such a rare car, but i'm sure it'll be nice.

I might see if someone would want to buy it before I did the swap itself. It still kinda needs stuff, but we will see.

Originally Posted by Zach/90\irocZ
yea im comtemplating between turbo maggie or just do n/a with just cam and tune and maybe port polish heads my issue is that i drive mines everday rain or shine lol i was looking into a lQ9 but around here in san diego there charging over 1000-1500+ on a block havent found good deal on that
Go LQ4. Cheaper and not much diffrence. Plus LQ4 is what you would want if doing a turbo or SC. Hell I can tell you how to build a junkyard turbo motor that will hold 700hp all day on stock parts if you want.
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Old Nov 9, 2012 | 01:23 PM
  #10  
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From: Houston, Texas
Car: 1986 Camaro
Engine: LS6
Transmission: Tick Stage 2 T56
Axle/Gears: Moser 12 Bolt
Re: 92 Z28 LSx/ T56 swap from IrocBoost

+1 for the Junkyard engine. 5.3 or 6.0. I'm builing a boosted 5.3 with stock bottend and head studs with LS6 camshaft and spring uprgrade with LS2 intake. Shooting for 800 hp. Hopefulling I can tune it with Mega squirt with out blowing it up!
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Old Nov 9, 2012 | 01:24 PM
  #11  
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Car: 88 Formula, 90 Iroc RIP, 92 RS Sold
Engine: 305 to 350
Transmission: 700r4
Axle/Gears: 10 Bolt
Re: 92 Z28 LSx/ T56 swap from IrocBoost

lol yea i was thinking about that due to less compression trust me ive been searching for good one but the latinos have a good system down and take all good parts as soon cars trucks are are newly put into junkyard its kinda crazy really but it sucks too

im only look for 600ish lol just being conservative and still manage over 20-25mpg on freeway which is doable goal for me ive seen and driven in turbo gm trucks and they achieve that in a heavier vehicle so yea
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Old Nov 9, 2012 | 01:25 PM
  #12  
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From: Houston, Texas
Car: 1986 Camaro
Engine: LS6
Transmission: Tick Stage 2 T56
Axle/Gears: Moser 12 Bolt
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Sounds like Houston... **** is stripped bare here.... And the junkyards around here think they are selling gold.
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Old Nov 9, 2012 | 01:26 PM
  #13  
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From: Tampa, FL, USA
Car: 93 240SX
Engine: LQ9
Transmission: T56
Axle/Gears: 3.54 R200 IRS
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Originally Posted by Grifter757
I might see if someone would want to buy it before I did the swap itself. It still kinda needs stuff, but we will see.


I only say that because I had one of them as well, traded my LT1/T56, spohn,bmr,slp everything upgraded swapped 88 camaro for it due to the rarity of the combo for that year, unfortunately mine was totalled
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Old Nov 9, 2012 | 01:41 PM
  #14  
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From: San Diego, California For Now
Car: 88 Formula, 90 Iroc RIP, 92 RS Sold
Engine: 305 to 350
Transmission: 700r4
Axle/Gears: 10 Bolt
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Originally Posted by ThirdGenDemon
Sounds like Houston... **** is stripped bare here.... And the junkyards around here think they are selling gold.

i know it pisses me off at times literally ive seen a whole car strip engine trans interior in like 2 hours they have there walki talki nextels lol i literally have to take vacation and be at junk yard at opening time when they get new cars to even get anything decent
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Old Nov 9, 2012 | 01:43 PM
  #15  
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From: Houston, Texas
Car: 1986 Camaro
Engine: LS6
Transmission: Tick Stage 2 T56
Axle/Gears: Moser 12 Bolt
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Yeah, and they are all in cahoots with each other now that LKQ is incorporated. That also drove the price up on the parts.
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Old Nov 9, 2012 | 01:48 PM
  #16  
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From: San Diego, California For Now
Car: 88 Formula, 90 Iroc RIP, 92 RS Sold
Engine: 305 to 350
Transmission: 700r4
Axle/Gears: 10 Bolt
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Originally Posted by ThirdGenDemon
Yeah, and they are all in cahoots with each other now that LKQ is incorporated. That also drove the price up on the parts.
sad day
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Old Nov 15, 2012 | 01:52 PM
  #17  
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Car: 87 IROC,
Engine: 370 LSx With Boost
Transmission: 4L80E
Axle/Gears: S-60 with 3.50s
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Some more pics with bigger tires up front now.


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Old Nov 15, 2012 | 02:25 PM
  #18  
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From: Salt Lake City, Utah
Car: 1988 camaro "SS"/ 1991 305/T5
Engine: 383 LT1 in progress/LT1TBI 355 soon
Transmission: Probuilt 700R4 3600 stall/ T5
Axle/Gears: Moser axles, 3.42 Eaton Posi
Re: 92 Z28 LSx/ T56 swap from IrocBoost

nice wheels, what kind are they?
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Old Nov 19, 2012 | 08:02 AM
  #19  
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From: Va beach
Car: 87 IROC,
Engine: 370 LSx With Boost
Transmission: 4L80E
Axle/Gears: S-60 with 3.50s
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Originally Posted by robertfrank
nice wheels, what kind are they?
XXR 521s
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Old Nov 20, 2012 | 07:56 AM
  #20  
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From: Niles, IL
Car: '91 LS6/T56/9"
Engine: LS6
Transmission: T56
Axle/Gears: Currie 9"/4.11, detroit truetrac
Re: 92 Z28 LSx/ T56 swap from IrocBoost

$800? score!!!

Last edited by five7kid; Nov 20, 2012 at 09:53 AM. Reason: Bypassing swear filter
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Old Nov 20, 2012 | 11:54 AM
  #21  
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From: Va beach
Car: 87 IROC,
Engine: 370 LSx With Boost
Transmission: 4L80E
Axle/Gears: S-60 with 3.50s
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Finished this up last night...

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Old Jan 21, 2013 | 06:05 PM
  #22  
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From: New Berlin Wi
Car: 88 Iroc
Engine: 94 lt1 modded
Transmission: t 56
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Nice find. Any info on size and backspacing of the wheels?
Kory
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Old Mar 18, 2013 | 09:31 PM
  #23  
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From: Va beach
Car: 87 IROC,
Engine: 370 LSx With Boost
Transmission: 4L80E
Axle/Gears: S-60 with 3.50s
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Finally got some time to fiddle with some of my stuff.
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Old Apr 3, 2013 | 08:10 AM
  #24  
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From: Va beach
Car: 87 IROC,
Engine: 370 LSx With Boost
Transmission: 4L80E
Axle/Gears: S-60 with 3.50s
Re: 92 Z28 LSx/ T56 swap from IrocBoost

I accidently the whole thing.

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Old Apr 11, 2013 | 09:03 PM
  #25  
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From: cove, texas
Car: 91 z28, 92 ZR1
Engine: LS1, LT5
Transmission: T56, ZF
Axle/Gears: 3.73/ 4.10
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Grifter, I finished my swap a few weeks ago, I was working on the tune and pressure built up in the tank, or vaccum , anyhow I replaced the C5 filter/reg. I was wondering cause it looked like you are running a stock tank as well, what are you doing with the stock line that goes to the evap canister? I am swapping the pump out in the AM but before I go running around I am gonna use a vented cap, just wasn't sure about that evap can line, any help would be great. Great deal on that car too btw, gl with the swap. Dan
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Old Apr 26, 2013 | 08:03 AM
  #26  
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From: Va beach
Car: 87 IROC,
Engine: 370 LSx With Boost
Transmission: 4L80E
Axle/Gears: S-60 with 3.50s
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Picked up a new hood for cheap. Should have the car running again today. Its been a roller coaster. Everything from trans not going in right to a M8 Arp head bolt snapping in the head but now its fill it full of fluids and a last fewconnectors plugged up and vroom.
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Old May 8, 2013 | 08:11 AM
  #27  
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From: Va beach
Car: 87 IROC,
Engine: 370 LSx With Boost
Transmission: 4L80E
Axle/Gears: S-60 with 3.50s
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Got all the bugs worked out and even though it took me twice as long as I thought it would I could not be happier with the end result. Car feels amazing for a super super low budget build. Here's the run down on the car now and will hopefully get some video later.

Low Mile 6.0 Iron Shortblock
243 heads
Comp Cams 228 224 .588 .581 113 Reverse Split
LS7 Lifters
LS2 Timing Chain
Stainless Long tube headers
True Dual exhaust with some chamber muffler = LOUD


Most everything I had left over from other builds or traded stuff I had. The car feels amazing and can't wait to get it on the dyno and then some track time to see what it'll do.
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Old May 8, 2013 | 09:06 AM
  #28  
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From: San Diego, California For Now
Car: 88 Formula, 90 Iroc RIP, 92 RS Sold
Engine: 305 to 350
Transmission: 700r4
Axle/Gears: 10 Bolt
Re: 92 Z28 LSx/ T56 swap from IrocBoost

Originally Posted by Grifter757
Got all the bugs worked out and even though it took me twice as long as I thought it would I could not be happier with the end result. Car feels amazing for a super super low budget build. Here's the run down on the car now and will hopefully get some video later.

Low Mile 6.0 Iron Shortblock
243 heads
Comp Cams 228 224 .588 .581 113 Reverse Split
LS7 Lifters
LS2 Timing Chain
Stainless Long tube headers
True Dual exhaust with some chamber muffler = LOUD


Most everything I had left over from other builds or traded stuff I had. The car feels amazing and can't wait to get it on the dyno and then some track time to see what it'll do.
6.0, Reverse Split Good, Good Flowing Exhuast + Fat/Flat Torque Curve = Alot of Fun
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