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.

91 Z28 Project.

Thread Tools
 
Search this Thread
 
Old 11-06-2008, 02:03 AM
  #1  
Junior Member
Thread Starter
 
007BALT's Avatar
 
Join Date: Oct 2007
Posts: 36
Likes: 0
Received 0 Likes on 0 Posts
Car: 91 Red Z28 G92 Spohn Suspn
Engine: 6.0/L92 Supercharged. Fully Built.
Transmission: 6L90E + G8 Shifter
Axle/Gears: 3.08
91 Z28 Project.

Ok original TPI 350 is out, k-member is out, also front suspension.

In went the new chrome molly k-member ( bolted right up no problems ) A-arms, front end rebuild kit, front coil over conversion ( pro tour ), complete poly bushings, engine harness out ( sent to get worked on ).

Next step, wait for harness, install that, install transmission ( 6L90E ) with G8 shifter ( manual mode option ) , custom made cross member with torque arm ( thanks Steve at Spohn ).

Then start rear suspension, LCA, coil over conversion, pan hard bar..... Basically everything, LS1 tank, ls1 Brakes, sub frame connectors.

Then finally take the car to get it tuned, and hope to hit 10's and get 25mpg with 2.93's in the back.

Specs, 4th gen block 6.0L/L92 heads ( 07 Silverado 2500 donor ), completely forged, cammed, and head work, built for boost, supercharger TVS 1900, 6L90E.


A problem that may come up is fuel, and.......... nothing money can’t fix.


Big thanks to Spohn for supplying the parts, Complete chrome molly everything, custom made tranny cross member witch will be complete when I measure it up and send it back to him for modification.

I have to say, I am happy how Steve took care of me his competion was whack,

STEVE thanks buddy.
Attached Thumbnails 91 Z28 Project.-imag0256.jpg   91 Z28 Project.-imag0257.jpg   91 Z28 Project.-imag0258.jpg  

Last edited by 007BALT; 11-06-2008 at 02:10 AM.
Old 11-06-2008, 02:06 AM
  #2  
Junior Member
Thread Starter
 
007BALT's Avatar
 
Join Date: Oct 2007
Posts: 36
Likes: 0
Received 0 Likes on 0 Posts
Car: 91 Red Z28 G92 Spohn Suspn
Engine: 6.0/L92 Supercharged. Fully Built.
Transmission: 6L90E + G8 Shifter
Axle/Gears: 3.08
Re: 91 Z28 Project.

More Pics
Attached Thumbnails 91 Z28 Project.-imag0259.jpg   91 Z28 Project.-imag0262.jpg   91 Z28 Project.-img_1169.jpg  
Old 11-06-2008, 02:07 AM
  #3  
Junior Member
Thread Starter
 
007BALT's Avatar
 
Join Date: Oct 2007
Posts: 36
Likes: 0
Received 0 Likes on 0 Posts
Car: 91 Red Z28 G92 Spohn Suspn
Engine: 6.0/L92 Supercharged. Fully Built.
Transmission: 6L90E + G8 Shifter
Axle/Gears: 3.08
Re: 91 Z28 Project.

More pics
Attached Thumbnails 91 Z28 Project.-img_1175.jpg   91 Z28 Project.-img_1176.jpg   91 Z28 Project.-img_1184.jpg  
Old 11-06-2008, 03:01 AM
  #4  
Member

iTrader: (1)
 
RevItUpZ28's Avatar
 
Join Date: May 2003
Location: NC
Posts: 457
Likes: 0
Received 1 Like on 1 Post
Car: '91 Camaro Z28
Engine: 383 Vortec HSR
Transmission: Pro-Built 700-R4;Vig 4000 stall
Axle/Gears: Moser M9 9" / 3.89
Re: 91 Z28 Project.

Sounds like a fun build! It's always nice to tear out/replace everything all at once.

What rearend do you plan on going with?
Old 11-06-2008, 06:11 AM
  #5  
Junior Member
Thread Starter
 
007BALT's Avatar
 
Join Date: Oct 2007
Posts: 36
Likes: 0
Received 0 Likes on 0 Posts
Car: 91 Red Z28 G92 Spohn Suspn
Engine: 6.0/L92 Supercharged. Fully Built.
Transmission: 6L90E + G8 Shifter
Axle/Gears: 3.08
Re: 91 Z28 Project.

Originally Posted by RevItUpZ28
Sounds like a fun build! It's always nice to tear out/replace everything all at once.

What rearend do you plan on going with?

12 bolt Moser with maybe 3.08 or if i can get 2.93's, I Gotta talk to Steve at Spohn to see what he can get.
Old 11-06-2008, 08:51 AM
  #6  
Supreme Member
iTrader: (1)
 
SheldonZ28's Avatar
 
Join Date: Jun 2006
Location: Guelph, Ontario
Posts: 1,067
Likes: 0
Received 0 Likes on 0 Posts
Car: 89 IROC/05 RX8
Engine: LS1/LS1
Transmission: T56/T56
Axle/Gears: 3.42 GM/3.55 8.8
Re: 91 Z28 Project.

Sweet Jesus
Old 11-06-2008, 11:35 AM
  #7  
Supreme Member
iTrader: (2)
 
91_5.7_TPI's Avatar
 
Join Date: Mar 2005
Location: East Tennesse
Posts: 2,820
Likes: 0
Received 3 Likes on 3 Posts
Car: 1991 RS Camaro
Engine: L03 (want LS1)
Transmission: 700R-4 (and T56)
Axle/Gears: 4th Gen 3.23 posi
Re: 91 Z28 Project.

The cash flow associated with this build is astounding....
looks like a nice build!
Old 11-06-2008, 12:31 PM
  #8  
Junior Member
Thread Starter
 
007BALT's Avatar
 
Join Date: Oct 2007
Posts: 36
Likes: 0
Received 0 Likes on 0 Posts
Car: 91 Red Z28 G92 Spohn Suspn
Engine: 6.0/L92 Supercharged. Fully Built.
Transmission: 6L90E + G8 Shifter
Axle/Gears: 3.08
Re: 91 Z28 Project.

sheldon i might ask you a couple of quiestions, later on on the ls1 tank.



91 5.7 tpi, you have no idea.
Old 11-06-2008, 01:18 PM
  #9  
Supreme Member

iTrader: (2)
 
JeremyNYR's Avatar
 
Join Date: Dec 2000
Location: Buffalo, NY
Posts: 2,361
Likes: 0
Received 2 Likes on 1 Post
Car: 1984 Trans Am
Engine: LT1
Transmission: T56
Axle/Gears: 10 bolt w/ 4.10 gears
Re: 91 Z28 Project.

why such a numerically low rear gear ratio?
Old 11-06-2008, 01:21 PM
  #10  
Junior Member
Thread Starter
 
007BALT's Avatar
 
Join Date: Oct 2007
Posts: 36
Likes: 0
Received 0 Likes on 0 Posts
Car: 91 Red Z28 G92 Spohn Suspn
Engine: 6.0/L92 Supercharged. Fully Built.
Transmission: 6L90E + G8 Shifter
Axle/Gears: 3.08
Re: 91 Z28 Project.

Originally Posted by JeremyNYR
why such a numerically low rear gear ratio?

6L90E has a 4.02 first gear, will feel like 3.73's or maybe 4.10's
Old 11-06-2008, 02:38 PM
  #11  
Supreme Member
iTrader: (1)
 
SheldonZ28's Avatar
 
Join Date: Jun 2006
Location: Guelph, Ontario
Posts: 1,067
Likes: 0
Received 0 Likes on 0 Posts
Car: 89 IROC/05 RX8
Engine: LS1/LS1
Transmission: T56/T56
Axle/Gears: 3.42 GM/3.55 8.8
Re: 91 Z28 Project.

Originally Posted by 007BALT
sheldon i might ask you a couple of quiestions, later on on the ls1 tank.



91 5.7 tpi, you have no idea.
Sounds good!
Old 11-06-2008, 02:41 PM
  #12  
Supreme Member

iTrader: (2)
 
JeremyNYR's Avatar
 
Join Date: Dec 2000
Location: Buffalo, NY
Posts: 2,361
Likes: 0
Received 2 Likes on 1 Post
Car: 1984 Trans Am
Engine: LT1
Transmission: T56
Axle/Gears: 10 bolt w/ 4.10 gears
Re: 91 Z28 Project.

Originally Posted by 007BALT
6L90E has a 4.02 first gear, will feel like 3.73's or maybe 4.10's
wow, that's wild! I just did the math and my T56 with 4.10s would be equivalent in final gearing to your 6L90E with 2.77s! I wonder if GM did that because it drastically reduces driveshaft RPMs.
Old 11-06-2008, 04:40 PM
  #13  
Supreme Member
TGO - 10 Year Member
iTrader: (3)
 
chevyowner02's Avatar
 
Join Date: May 2004
Location: Kingsport Tenn
Posts: 1,036
Received 0 Likes on 0 Posts
Car: 1992 camaro
Engine: LT1
Transmission: 4L60E
Axle/Gears: 3:73
Re: 91 Z28 Project.

That is going to haul a$$.
The more of these 6.0l swaps I see it's starting to make me want to sell the
LT1 and hit the little truck motor.
Old 11-06-2008, 05:13 PM
  #14  
AC
Supreme Member

iTrader: (3)
 
AC's Avatar
 
Join Date: Jun 2000
Location: CT
Posts: 1,680
Likes: 0
Received 2 Likes on 2 Posts
Car: Used to drive a camaro
Re: 91 Z28 Project.

007, nice work. I'm hoping to order the kmember and spring perch a-arms soon. Also good to hear "in with no problems". Alot of people seemed to have problems at some point bolting that unit in. I haven't to date had any problems with the 5 Spohn products I've put on my chassis (SFC,LCA,rear solid sway bar, adj.torque arm, TKO xmember).

Keep the pics comin when that LSX goes in!
Old 11-07-2008, 01:55 AM
  #15  
Junior Member
Thread Starter
 
007BALT's Avatar
 
Join Date: Oct 2007
Posts: 36
Likes: 0
Received 0 Likes on 0 Posts
Car: 91 Red Z28 G92 Spohn Suspn
Engine: 6.0/L92 Supercharged. Fully Built.
Transmission: 6L90E + G8 Shifter
Axle/Gears: 3.08
Re: 91 Z28 Project.

Originally Posted by AC
007, nice work. I'm hoping to order the kmember and spring perch a-arms soon. Also good to hear "in with no problems". Alot of people seemed to have problems at some point bolting that unit in. I haven't to date had any problems with the 5 Spohn products I've put on my chassis (SFC,LCA,rear solid sway bar, adj.torque arm, TKO xmember).

Keep the pics comin when that LSX goes in!
ya i thought about it also that it wont bolt up, but then i said to myself, this isnt new it should have been corrected by now if their was a problem, plus its built with a jig, so all are the same size, shape, dimension, measurments, plus if something like this wouldnt bolt right up, then their might be something wrong with the frame.

I had a small dent on the frame, thought it wouldnt bolt up, but it did, wheels lined up, coil overs are on, blah blah blah, lets just say some experts where telling me nothing like this bolts right up, i must say i thought the same, but it did, i suggest you go with Spohn.
Old 11-07-2008, 02:23 AM
  #16  
Member

iTrader: (1)
 
RevItUpZ28's Avatar
 
Join Date: May 2003
Location: NC
Posts: 457
Likes: 0
Received 1 Like on 1 Post
Car: '91 Camaro Z28
Engine: 383 Vortec HSR
Transmission: Pro-Built 700-R4;Vig 4000 stall
Axle/Gears: Moser M9 9" / 3.89
Re: 91 Z28 Project.

Can't wait to see more pics! Keep us updated.
Old 11-07-2008, 06:25 AM
  #17  
Senior Member
 
SomeGuy25thZ's Avatar
 
Join Date: Sep 2007
Location: Long Island, NY
Posts: 599
Likes: 0
Received 1 Like on 1 Post
Car: 1992 z28
Engine: 383 LT1 in the works
Transmission: T-56 in the works
Axle/Gears: 3.73 in the works
Re: 91 Z28 Project.

This is awesome, I am doing the exact same as far as suspension goes.. complete spohn rebuild every single part (well almost )

Keep the pics flowing and def. give some pointer if you run across any issues installing things. I will def. need to know
Old 11-07-2008, 10:34 AM
  #18  
Junior Member
Thread Starter
 
007BALT's Avatar
 
Join Date: Oct 2007
Posts: 36
Likes: 0
Received 0 Likes on 0 Posts
Car: 91 Red Z28 G92 Spohn Suspn
Engine: 6.0/L92 Supercharged. Fully Built.
Transmission: 6L90E + G8 Shifter
Axle/Gears: 3.08
Re: 91 Z28 Project.

at this point, only problams i see that might come up is the 6L90E trannsmission. The G8 Shifter, and fuel. Other then that everything was a direct bolt up.


I didnt have to compress the springs to get the front coil overs installed.

I just had to modifiy the monroe struts to acept the spring perch ( aka ujustable part ). Thats about it as far as modification goes.

Im sure more mods will come up, A/C, shifter, and emmissions crap.

Old 11-07-2008, 12:32 PM
  #19  
Supreme Member
iTrader: (2)
 
91_5.7_TPI's Avatar
 
Join Date: Mar 2005
Location: East Tennesse
Posts: 2,820
Likes: 0
Received 3 Likes on 3 Posts
Car: 1991 RS Camaro
Engine: L03 (want LS1)
Transmission: 700R-4 (and T56)
Axle/Gears: 4th Gen 3.23 posi
Re: 91 Z28 Project.

I have some idea. I've done alot of research into different build ideas and I have a fair idea of price of the aftermarket pieces you need for the swap. ]
Should be a really fun car when it's all said and done.
Old 07-13-2009, 03:02 AM
  #20  
Junior Member
Thread Starter
 
007BALT's Avatar
 
Join Date: Oct 2007
Posts: 36
Likes: 0
Received 0 Likes on 0 Posts
Car: 91 Red Z28 G92 Spohn Suspn
Engine: 6.0/L92 Supercharged. Fully Built.
Transmission: 6L90E + G8 Shifter
Axle/Gears: 3.08
Re: 91 Z28 Project.

ok well im back on this project, after a while of working and trying to make the wife happy with money.

I am safe to say that this is on the front burner again.


So lets recap, everything is ready for the install.

Wish me luck guys.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
F.I. 57 Belair
DFI and ECM
8
08-23-2021 01:09 AM
plm99
Southern California Area
5
11-16-2015 05:21 PM
sreZ28
Engine/Drivetrain/Suspension Parts for Sale
5
10-22-2015 08:21 AM
Nick McCardle
Firebirds for Sale
1
09-10-2015 08:36 PM



Quick Reply: 91 Z28 Project.



All times are GMT -5. The time now is 02:05 AM.