the_merv

iTrader: (88)

This is the Swap Thread for the installation of my LS Engine into my 95 Z28. Some of this info will help you guys that are looking into this. I went through this thread and put every post of mine with pics and info to the beginning here so it's easier to see. I started into this in March '07 when I built the Harness and had the LS PCM Tuned, then I sold the LT1 stuff out of the Car, and in June '07 it was running with the LS setup.

Chassis: 1995 Camaro Z28
Engine: 408ci 6.7l LQ4/L92 Stroker
Transmission: Tremec T56 6spd, Built with Tick Performance Stage II Kit
Wiring: 1999 F-Body LS1 Harness, 2002 PCM

Here are some links to threads that I have made:
LS1 HARNESS WIRED INTO LT1 CAR
T56 SWAP
T56 TRANSMISSION BUILD
1998 CAMARO SWAP THREAD

Specs:

GM 6.0l Truck Iron Block
L92 Heads, Milled .025", PRC .660 Lift Dual-Coil Springs
TX Speed 7.400" Hardened Push Rods
L76 Intake, Holley 90mm TB, Complete LS2 Fuel Injection
Custom Cam 243/247, .621(XFI)/.612(X-ER), 114+3LSA, LS2 Timing Set
Eagle Forged 4340 4.000" Crank, Eagle 4340 Forged 6.125" H-Beam Rods
Mahle Forged -12cc Pistons, 4.030" Bore, Moly Rings
Fully Balanced Rotating Assembly
Fully Tuned, set at 32*-34* Timing
Cometic MLS Head Gaskets
Clevite P-series Bearings
Melling High-Volume Oil Pump
Everything essential needed to fit in a F-body(Oil Pan, Accessories..etc.)

Wiring:
I researched and completely built the Harness that I have. It took about 15 hours to complete. I stripped it completely out, leaving only the essentials. I took out the AC, A.I.R., EGR, TCS, Cruise Control, Rear O2's, and a few other things. I added LS2 Fuel Injectors, and the Connector for a Corvette 85mm MAF. I also re-wired the Coolant Temp Sensor to the 3-wire Sensor and Connector from a 1998 F-body LS1(part number 12551708). The 3rd Wire is for the Gauges, they are still Analog cause the Car is older than a 1999.
I re-wired it to plug directly into the LT1 Chassis. Everything is where it should be, all the Gauges work, and the Tach has been adjusted. I re-wired everything for the T56, and even moved the O2 Sensor Connectors to above the Transmission, now I don't need any Extentions. I also moved the Grounds to the Passengers side Head, I made them to bolt to where the Oil Dip Stick Tube bolts onto the Head.

I also went through the Wiring from the Connector on the Wheel Well and going through it all the way to the Fuse Box. I re-wired the Fuse Box to clean up some things and to give each circuit in the Harness power and made it run on a fuse. I also re-did the wiring for the Cooling Fans so they run with the PCM, and I have them running on Manual Switches.

Above at the top of the page is a Link to a little guide I made up on how to wire in a LS1 Harness into this car.

Here is a pic of the Engine Harness after I got done..


Fuel System:
The LT1 Fuel System is pretty much a seperate System from the PCM, so all it needed was power and it was good. I matched up all the required Wires for it, and it works, Gauges didn't have to be touched. I had to use a 1999-up LS1 Corvette Fuel Filter/Regulator to make the Fuel from the 2-Line LT1 System go into a single inlet Line to the LS2 Rails. I'm using a Walbro 255 Fuel Pump.

Mounts:
I'm using a LS1 K-member with LS1 Mounts. The Upper Mounts have Polyurethane Bushings installed. I was using the stock LT1 T56 Crossmember for the LS1 T56..it works without issue when using the LS1 K-member. I swapped to a UMI Crossmember setup.

LS1 Polyurethane Mounts..


LS1 K-member installed..
Notice my ABS Delete..it works like a champ..stops even quicker.


I did have it mounted in with Conversion Mounts on the LT1 K-member for a while though..I had to use the LS1 setup due to Drivetrain clearance issues. The Conversion Mounts I used moved the entire Drivetrain back 3/4" to the rear, the Drive Shaft to Transmission clearance was too tight.

Steering:
The Steering had to be changed out for the LS1 Rack, it clears the Engine, the LT1 Rack and Linkage won't.


Under the car is a UMI Performance Adjustable Torque Arm. I have the one that has the Relocation Crossmember designed to bolt the Torque Arm to it instead of the Torque Arm to the Tranny..


I had to clearance the Oil Pan..this is the front of it where the divot is for the #1 Rod Bolt. I had to grind it down a little bit more.


Here is the Short Block for the new 408..

I had to Drill & Tap the flange on the Drivers Side of the Block to mount the Alternator Bracket.

Here is the 408 about to go in the car..






In the car..







Finished up..







This is a Wiring Diagram that I made for how I wired the Manual Fan Switches that I have..


I adapted the Stock LT1 Fuel System into the 1999-up Corvette Fuel Filter/Regulator, and had a custom Line made to go from that to the LS2 Rails. The Regulator is mounted up front near the Fuse Box.



On the car I ran into a Wiring issue that I think was a bad communication in wiring, the Starter Relay on the LT1 car was not letting enough amperage through to the Starter to turn over the LS Engine. I bypassed it and it started up like a charm. I eventually took out the Relay and I re-installed it for the Neutral Safety Relay in my T56 setup. I put the Relay on the Starter Wire, and the Switch on the Clutch Petal is what activates it and allows the Car to start.

Here is the location of the Relay I had to bypass..



Overall this swap isn't too difficult to do, the Wiring was the most time-consuming part cause I wasn't familiar with it, and now that is easy to do..

The car itself..

99NMB

iTrader: (7)

thats badass, post up some more picts.

Schitzo

iTrader: (6)

Ive been following your project. It'll be one fine 95 when done. All the best and keep us posted.

Mikey 97Z M6

iTrader: (37)

Nice! I'm getting the final things together for my LS1 swap into the 97'.

Did you re-use the LT1 K-member with adaptors for the motor mounts?

I'll be following this thread with great interest.

Mike

TheBiz

iTrader: (45)

Merv has helped me out on the wiring. Mine should be fired up in the next week or so. I went with the LS1 Tubular K member in order solve the motor mount issue (I had one available, so it was easier).

-You will also have to change the throttle cable to a non-TC LS1 cable. They are like 19 bucks from a dealership.
-If you are going to a LS1 6-speed, you will also have to change the clutch hydrolics to match the tranny as well.
-Might look into the coolant hoses as well. If you have a donor car, just switch the radiator. If not, the LT1 radiator will work with different hoses.

In all honesty, I think there is a little more room in the LT1 engine bay vs. the LS1. With the tubular K-member, I we were about one primary off from puting the headers in from the top.

If y'all have any questions let one of us know. We should be able to help you out.

Mustang guys will never see it coming. "Pshhh, thats just an Lt1 car."

Here are the Specs on mine.

...and if Merv doesn't mind, I'm going to post some pics of mine as well..

Imnotfast

iTrader: (1)

Veeery Coool. Looking at doing one myself once my daily driver LTx is done

95FbFormula

iTrader: (25)

So have you ever thought of doing some wire harness sets and selling them off for other people attempting the swap.

daniel6718

iTrader: (36)

i know a little about this also....im the one that already has it done and running!!!

the_merv

iTrader: (88)

^^ I helped him build his Harness.

Nice pics Biz..let us know how that 6.0 does, they are beasts themselves..

bluecamaroz28

Nice work.

How is the LS1 Rack and Linkage different from LT1.

TheBiz,

Is that a truck oil pan you are using? Does it give more clearence than Camaro oil pan?

TheBiz

iTrader: (45)

The LT1 rack and steering knuckle won't clear the LS1 headers. I'm using and LS1 style pan off a 99 Formula (I'm also using an LS1 tubular K0member). There are no clearance issues what so ever. Actually, there is a little more room (width wise) in an LT1 motor bay.

Mikey 97Z M6

iTrader: (37)

Ya, if you look closely at the pictures above, you'll notice that the angle point coming out of the rack to the steering rod are at different angles.

So, when talking about the trans crossmember between LS1/LT1; are the mounting points on the chassis' different, or the actual tranny crossmembers are different? Just wondering if I need to find an LS1 trans crossmember, or modify an LT1?

Mike

the_merv

iTrader: (88)

The LS1 Crossmember won't bolt to the LT1 Chassis. The Mounting point on the LS1 Tranny is appx. 1.5" behind the LT1 Tranny, so that is why I had to modify the LT1 Crossmember.

Mikey 97Z M6

iTrader: (37)

Good information, thanks.

One would think that GM would just change the damn crossmember instead of making changes to the chassis?

Mike

the_merv

iTrader: (88)

That's GM for ya..

landstuhltaylor

iTrader: (6)

...and a **** brown rug

the_merv

iTrader: (88)

Bla..

TheBiz

iTrader: (45)

Who needs fancy carpet when you have a big cube LSx motor going into a worthless LT1 body? There are more important things than interior decorating.

the_merv

iTrader: (88)

Hey.. it's not worthless..it's a sleeper..

TheBiz

iTrader: (45)

I totally agree.

On a side note, I got my LT1 crossmember bolted up today with NO MODIFICATION! The crossmember bolted to the tranny and then to the under body without elongating any holes, or welding on any tabs. Suprised the HELL out of me.