Will a 94 lt1 fit in a 93 z28
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Will a 94 lt1 fit in a 93 z28
I’ve done some research and found that the lt1 itself should be no problem to convert but will I be able to put a 4l60e in my car without having to change the wiring harness. I’m thinking I won’t be able to since the 4l60 from my car has the tv cable and everything. Does anyone know if it’s possible to do this
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Re: Will a 94 lt1 fit in a 93 z28
Is it an absolute necessity that you install the 1994 4L60E in your 93? Can't you just swap in the 1994 engine?
While the engine "fits", the fuel supply/return connection location at the rails is different. There are also some minor issues like the harness connector for the idle air control motor. If you keep the 1993 4L60 and install the 1994 engine, use your existing 1993 intake manifold/fuel rails/throttle body and the two issues I mentioned, and the TV cable connection, go away. You may also notice a difference in the location of the oil pressure sensor, since the sensor was moved from above the oil filter to the top/rear wall of the block early in the 1994 model year.
Good info on the differences between 1993 and 1994, from Shoebox:
http://shbox.com/1/4th_gen_f-body_ye...onversions.pdf
While the engine "fits", the fuel supply/return connection location at the rails is different. There are also some minor issues like the harness connector for the idle air control motor. If you keep the 1993 4L60 and install the 1994 engine, use your existing 1993 intake manifold/fuel rails/throttle body and the two issues I mentioned, and the TV cable connection, go away. You may also notice a difference in the location of the oil pressure sensor, since the sensor was moved from above the oil filter to the top/rear wall of the block early in the 1994 model year.
Good info on the differences between 1993 and 1994, from Shoebox:
http://shbox.com/1/4th_gen_f-body_ye...onversions.pdf
Thread Starter
Registered User
Joined: Feb 2019
Posts: 32
Re: Will a 94 lt1 fit in a 93 z28
Is it an absolute necessity that you install the 1994 4L60E in your 93? Can't you just swap in the 1994 engine?
While the engine "fits", the fuel supply/return connection location at the rails is different. There are also some minor issues like the harness connector for the idle air control motor. If you keep the 1993 4L60 and install the 1994 engine, use your existing 1993 intake manifold/fuel rails/throttle body and the two issues I mentioned, and the TV cable connection, go away. You may also notice a difference in the location of the oil pressure sensor, since the sensor was moved from above the oil filter to the top/rear wall of the block early in the 1994 model year.
Good info on the differences between 1993 and 1994, from Shoebox:
http://shbox.com/1/4th_gen_f-body_ye...onversions.pdf
While the engine "fits", the fuel supply/return connection location at the rails is different. There are also some minor issues like the harness connector for the idle air control motor. If you keep the 1993 4L60 and install the 1994 engine, use your existing 1993 intake manifold/fuel rails/throttle body and the two issues I mentioned, and the TV cable connection, go away. You may also notice a difference in the location of the oil pressure sensor, since the sensor was moved from above the oil filter to the top/rear wall of the block early in the 1994 model year.
Good info on the differences between 1993 and 1994, from Shoebox:
http://shbox.com/1/4th_gen_f-body_ye...onversions.pdf
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Joined: Nov 1998
Posts: 71,122
From: Hell was full so they sent me to NJ
Re: Will a 94 lt1 fit in a 93 z28
Just an engine from a 96?
Same problems as the 94 with regard to the IAC connector, the fuel line connectors, and the need to use you 93 intake manifold, fuel rails and throttle body. Also the 93 injectors, unless you get a new chip for the 93 ECM. Then some new problems:
- short Opti harness has to be from the 96 because 96 Opti connector is different. No other issues with regard to using the 96 vented Opti. The 96 engine should come with the vent vacuum hoses.
- you have to install your 93 knock sensor (4,000 ohms) in the 96 engine. You can’t use the 96 knock sensor (100K ohms) with a 93 ECM.
- you have to use your 93 dual-connector ignition coil, in place of the 96 single-connector coil, to match your 93 harness.
- you will have unused connections on the 96 engine for its crank position sensor and the EVAP vacuum switch, neither of which are needed by the 93 ECM.
- you have to use your 93 exhaust manifolds because the AIR plumbing is different on the 96. And I'm not sure if the driver side 96 manifold will connect to the 93 Y-pipe, because of the 96 cat converter location.
In all years 94-97 you have to keep your 93 harness.
Same problems as the 94 with regard to the IAC connector, the fuel line connectors, and the need to use you 93 intake manifold, fuel rails and throttle body. Also the 93 injectors, unless you get a new chip for the 93 ECM. Then some new problems:
- short Opti harness has to be from the 96 because 96 Opti connector is different. No other issues with regard to using the 96 vented Opti. The 96 engine should come with the vent vacuum hoses.
- you have to install your 93 knock sensor (4,000 ohms) in the 96 engine. You can’t use the 96 knock sensor (100K ohms) with a 93 ECM.
- you have to use your 93 dual-connector ignition coil, in place of the 96 single-connector coil, to match your 93 harness.
- you will have unused connections on the 96 engine for its crank position sensor and the EVAP vacuum switch, neither of which are needed by the 93 ECM.
- you have to use your 93 exhaust manifolds because the AIR plumbing is different on the 96. And I'm not sure if the driver side 96 manifold will connect to the 93 Y-pipe, because of the 96 cat converter location.
In all years 94-97 you have to keep your 93 harness.
Thread Starter
Registered User
Joined: Feb 2019
Posts: 32
Re: Will a 94 lt1 fit in a 93 z28
Just an engine from a 96?
Same problems as the 94 with regard to the IAC connector, the fuel line connectors, and the need to use you 93 intake manifold, fuel rails and throttle body. Also the 93 injectors, unless you get a new chip for the 93 ECM. Then some new problems:
- short Opti harness has to be from the 96 because 96 Opti connector is different. No other issues with regard to using the 96 vented Opti. The 96 engine should come with the vent vacuum hoses.
- you have to install your 93 knock sensor (4,000 ohms) in the 96 engine. You can’t use the 96 knock sensor (100K ohms) with a 93 ECM.
- you have to use your 93 dual-connector ignition coil, in place of the 96 single-connector coil, to match your 93 harness.
- you will have unused connections on the 96 engine for its crank position sensor and the EVAP vacuum switch, neither of which are needed by the 93 ECM.
- you have to use your 93 exhaust manifolds because the AIR plumbing is different on the 96. And I'm not sure if the driver side 96 manifold will connect to the 93 Y-pipe, because of the 96 cat converter location.
In all years 94-97 you have to keep your 93 harness.
Same problems as the 94 with regard to the IAC connector, the fuel line connectors, and the need to use you 93 intake manifold, fuel rails and throttle body. Also the 93 injectors, unless you get a new chip for the 93 ECM. Then some new problems:
- short Opti harness has to be from the 96 because 96 Opti connector is different. No other issues with regard to using the 96 vented Opti. The 96 engine should come with the vent vacuum hoses.
- you have to install your 93 knock sensor (4,000 ohms) in the 96 engine. You can’t use the 96 knock sensor (100K ohms) with a 93 ECM.
- you have to use your 93 dual-connector ignition coil, in place of the 96 single-connector coil, to match your 93 harness.
- you will have unused connections on the 96 engine for its crank position sensor and the EVAP vacuum switch, neither of which are needed by the 93 ECM.
- you have to use your 93 exhaust manifolds because the AIR plumbing is different on the 96. And I'm not sure if the driver side 96 manifold will connect to the 93 Y-pipe, because of the 96 cat converter location.
In all years 94-97 you have to keep your 93 harness.
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Joined: Nov 1998
Posts: 71,122
From: Hell was full so they sent me to NJ
Re: Will a 94 lt1 fit in a 93 z28
If the 96 engine has heads/cam, it most likely already has larger than stock injectors. You will want to use the 96 injectors with your 93 fuel rails/intake.
Your 93 ECM will need a new chip burned by an experienced tuner. The tuner will have a questionnaire to fill out with info about your build:
- you need to identify the 96 injectors with regard to brand/type and flow rating. When you pull them, look for a part number or other identifying markings. Some Ford injectors have different colored tops.
- you need to get as much info as possible about the cam. A part number and manufacturer is good. The tuner will need to know duration at 0.050" lift, lobe separation angle, and lobe lift plus the rocker arm ratio (1.5X or 1.6X).
- you need to find out more about the heads, in particular the head flow in CFM vs. valve lift.
The short Opti harness starts with a gray connector on the bracket on the passenger side of the intake manifold. Shoebox has a photo:
http://shbox.com/1/evap_sol.jpg
93 appearance may be slightly different. But the harness end is the same for all years 93-97.
The other end of the short Opti harness inserts into the socket on the Opti. The 93/94 Opti requires a very short harness connector. The 95-97 Opti requires a longer connector with a greater insertion depth.
93-94:
https://cdn2.bigcommerce.com/server2...0.1280.jpg?c=2
95-97
https://cdn2.bigcommerce.com/server2...0.1280.jpg?c=2
Your 93 ECM will need a new chip burned by an experienced tuner. The tuner will have a questionnaire to fill out with info about your build:
- you need to identify the 96 injectors with regard to brand/type and flow rating. When you pull them, look for a part number or other identifying markings. Some Ford injectors have different colored tops.
- you need to get as much info as possible about the cam. A part number and manufacturer is good. The tuner will need to know duration at 0.050" lift, lobe separation angle, and lobe lift plus the rocker arm ratio (1.5X or 1.6X).
- you need to find out more about the heads, in particular the head flow in CFM vs. valve lift.
The short Opti harness starts with a gray connector on the bracket on the passenger side of the intake manifold. Shoebox has a photo:
http://shbox.com/1/evap_sol.jpg
93 appearance may be slightly different. But the harness end is the same for all years 93-97.
The other end of the short Opti harness inserts into the socket on the Opti. The 93/94 Opti requires a very short harness connector. The 95-97 Opti requires a longer connector with a greater insertion depth.
93-94:
https://cdn2.bigcommerce.com/server2...0.1280.jpg?c=2
95-97
https://cdn2.bigcommerce.com/server2...0.1280.jpg?c=2
Last edited by Injuneer; Nov 13, 2019 at 12:32 PM.
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