C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Lt1 Interchangeable Parts?

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Old Dec 23, 2004 | 07:51 AM
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Default Lt1 Interchangeable Parts?

Guys,
Can I put the Heads and Intake from a 94 Z28 LT1 on a 96LT1 crate engine?
I thought the only parts that are not interchangeable are: time chain cover, cam (It will work if you change timing cover), Opti (you need to change cam,timing cover and wiring harness connector)

Is this correct?
Any other parts that are not interchangeable?

Regards,
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Old Dec 23, 2004 | 09:45 AM
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I believe that you're correct. The heads and intake should work w/o any problems. I'm assuming that the engine is then going back into the '94 Z28. I only say this because there might me some differences (placement of sensors, routing of coolant hoses, etc.) between the 'Vette and the Z28 engines.
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Old Dec 23, 2004 | 10:53 AM
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Originally Posted by tvetta
Guys,
Can I put the Heads and Intake from a 94 Z28 LT1 on a 96LT1 crate engine?
I thought the only parts that are not interchangeable are: time chain cover, cam (It will work if you change timing cover), Opti (you need to change cam,timing cover and wiring harness connector)

Is this correct?
Any other parts that are not interchangeable?

Regards,

The heads and intake will directly bolt on but the F body's fuel line location on the fuel rails maybe different than the Corvette fuel lines. I know that 93 and 94 were different than a 95/96 Corvette. Where in the Corvette the lines goes towards the AC/heater box where the feed and return lines are located. The F body fuel lines comes from the drivers side of the car via flexible hoses.
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Old Dec 23, 2004 | 11:17 AM
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The engine will go into a 1994 corvette.
I am going to swap the fuel rails, thermostat housing, injectors etc. from the existing engine. I am only using the bare castings but retro fitting the bolt ons.
Do you think this will be okay.
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Old Dec 23, 2004 | 11:40 AM
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I have installed a 95 Z-28 motor into a corvette (My last motor. As long as you use your fuel rails and assys you will be fine. If you are going with the updated opti you will need to get a pig tail for the newer style Opti connector.
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Old Dec 23, 2004 | 12:01 PM
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I am using a dynatech gen11 and the are making it with a 1994 harness connection to avoid any pigtailing
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Old Dec 23, 2004 | 12:07 PM
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Not sure if this means anything or not but, is the valves and flow numbers the same from the F-body heads to the Vette? If they are not I think that may be a small problem with the Vette tune. But I could be WAY off on this. I'm not sure about that stuff, I'm still trying to figure all that out.
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Old Dec 23, 2004 | 01:22 PM
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Originally Posted by fsr402
Not sure if this means anything or not but, is the valves and flow numbers the same from the F-body heads to the Vette? If they are not I think that may be a small problem with the Vette tune. But I could be WAY off on this. I'm not sure about that stuff, I'm still trying to figure all that out.
If we can't get the answer in this forum then there is no hope.
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Old Dec 24, 2004 | 07:19 AM
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Originally Posted by FD2BLK
I have installed a 95 Z-28 motor into a corvette (My last motor. As long as you use your fuel rails and assys you will be fine. If you are going with the updated opti you will need to get a pig tail for the newer style Opti connector.
Did you use the oil pan from the camaro engine or did you buy another one?
I bought a crate engine and no one has been able to tell me if a camaro, impalla or corvette share the same oil pan?
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Old Dec 24, 2004 | 08:49 AM
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Originally Posted by fsr402
Not sure if this means anything or not but, is the valves and flow numbers the same from the F-body heads to the Vette? If they are not I think that may be a small problem with the Vette tune. But I could be WAY off on this. I'm not sure about that stuff, I'm still trying to figure all that out.
They are the same heads and valves and have the same flow numbers, the Stock tune will adapt to some pretty big changes anyway. I had ported heads and intake with a LT4 HC and 1.6 cranes R/R's and the car ran perfect. Would it have made more HP with a good dyno tune you bet but I can't see how day to day driving could have been any better then it already was.
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Old Dec 24, 2004 | 12:46 PM
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Originally Posted by tvetta
The engine will go into a 1994 corvette.
I am going to swap the fuel rails, thermostat housing, injectors etc. from the existing engine. I am only using the bare castings but retro fitting the bolt ons.
Do you think this will be okay.
Dont forget to swap out the collant pump because the corvettes pump is diffrent than an F-Body's coolant pump
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Old Dec 24, 2004 | 03:28 PM
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Originally Posted by comp94
Dont forget to swap out the collant pump because the corvettes pump is diffrent than an F-Body's coolant pump
I assume you meant water pump.? Thanks, if did mean that, I thought they used the same. Thanks for your help?
I am still trying to find out about the oil pan?
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Old Dec 25, 2004 | 12:40 PM
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Originally Posted by tvetta
I assume you meant water pump.? Thanks, if did mean that, I thought they used the same. Thanks for your help?
I am still trying to find out about the oil pan?
Opp's forgot all about te Water pump and oil pan. The F-bodu oil pan will work fine as long as it is the pan that came on the motor because it needs to match the oil pick up. Another words if you stick you corvette pan on the F-bo motor you will need to swap the oil pump pick up as well but if you leave the F-bod oil pan on the F-body motor it will work fine, thats the pan I am running on my car now. As far as he water pump goes they are a bit different. The F-body pump has an aditional line on the passangers side (I think it's for an external oil cooler) and the drivers side heater hose conectors are a bit different as well. To use the F-body pump you need to plug the extra outlet (I used a 3" piece of heater hose and a plug. ). The diferences in the positions for the heater hose will work even thogh they are a bit diferent. If you have any questions feel free to give me a call if you still have my phone number or shoot me an e-mail. I have put the F-body motor in a 94 so I am prety familure with it.
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Old Dec 25, 2004 | 02:10 PM
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Originally Posted by FD2BLK
Opp's forgot all about te Water pump and oil pan. The F-bodu oil pan will work fine as long as it is the pan that came on the motor because it needs to match the oil pick up. Another words if you stick you corvette pan on the F-bo motor you will need to swap the oil pump pick up as well but if you leave the F-bod oil pan on the F-body motor it will work fine, thats the pan I am running on my car now. As far as he water pump goes they are a bit different. The F-body pump has an aditional line on the passangers side (I think it's for an external oil cooler) and the drivers side heater hose conectors are a bit different as well. To use the F-body pump you need to plug the extra outlet (I used a 3" piece of heater hose and a plug. ). The diferences in the positions for the heater hose will work even thogh they are a bit diferent. If you have any questions feel free to give me a call if you still have my phone number or shoot me an e-mail. I have put the F-body motor in a 94 so I am prety familure with it.
Last question for today.
How about the harmonic balancer?
The crate engine has one which I am sure is for the fbody.
Can I use this, I am having the engine balanced by the machine shop.
And I don't know if this means anything, but I am using a stock Dual Mass and GM Clutch assembly.

Regards,
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Old Dec 25, 2004 | 07:49 PM
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Originally Posted by tvetta
Last question for today.
How about the harmonic balancer?
Nope need to use the corvette balancer but they should be neutral ballanced so you should be fine with using the old vette balancer
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