Engine swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Bobbyh68 · 10-27-2008, 01:30 PM

I have access to a wrecked 94 Silverado with a 5.7 auto trans. When i pull the motor for my 56 shortbed, do i remove the computer also? Or is it just better to use a carb. and forget about the computer. It looks like it will be a lot easier to go with a carb. Anyone ever do this swap before. Please help!!

Atomsplitter · 10-27-2008, 04:37 PM

I'm not sure how to change your particular motor over to a carb. but I took the computerized fuel injected route and installed a stock 1995 Impala SS 5.7 LT1. I needed to get the wiring harness altered to remove wires for crap like the low washer level warning and the like. I also took the plactic fuel lines, power steering pump and reservoir, engine fuse block, Mass Airflow Sensor, Fans and I even took the coolant reservoir. I eventually threw out the bits I didn't need but removing too much is never a bad thing because you may need it later.
I do want to say that if it hadn't been for a friend that has done this LT1 swap at least a dozen times I would never have gone doen it. If it wasn't for my friend I would have been installing a carberated motor because I have no idea where to start to fix anything on the computer end of this install and he has a laptop with the computer disc to reprogram my computer. In my opinion for the average home garage wrench bender its alot cheaper and fixable to stay old-school than to go high tech with the fuel injection. Besides if your looking to make upgrades along the way it will be cheaper with the carb. Consider a bigger carb as a simple upgrade..... for me I need larger Injectors ($300), the intake has to be machined out ($), larger throttle body ($200?) and the computer program needs to be made and re-flashed to the computer ($200 + labour).

OrrieG · 10-27-2008, 07:11 PM

If you can, I would drag the whole donor rig home so you can get what you need, even if you know you don't need it yet, then scrap the rest. That is what I did with my truck this time so I don't have to be running around trying for find miscellanious stuff or fabricating something I can just unbolt.

10-27-2008, 01:30 PM	#1
Bobbyh68 Registered User Join Date: Jul 2008 Location: Summerville SC Posts: 42	Engine swap I have access to a wrecked 94 Silverado with a 5.7 auto trans. When i pull the motor for my 56 shortbed, do i remove the computer also? Or is it just better to use a carb. and forget about the computer. It looks like it will be a lot easier to go with a carb. Anyone ever do this swap before. Please help!!

10-27-2008, 04:37 PM	#2
Atomsplitter Registered User Join Date: Mar 2006 Location: Ontario Posts: 514	Re: Engine swap I'm not sure how to change your particular motor over to a carb. but I took the computerized fuel injected route and installed a stock 1995 Impala SS 5.7 LT1. I needed to get the wiring harness altered to remove wires for crap like the low washer level warning and the like. I also took the plactic fuel lines, power steering pump and reservoir, engine fuse block, Mass Airflow Sensor, Fans and I even took the coolant reservoir. I eventually threw out the bits I didn't need but removing too much is never a bad thing because you may need it later. I do want to say that if it hadn't been for a friend that has done this LT1 swap at least a dozen times I would never have gone doen it. If it wasn't for my friend I would have been installing a carberated motor because I have no idea where to start to fix anything on the computer end of this install and he has a laptop with the computer disc to reprogram my computer. In my opinion for the average home garage wrench bender its alot cheaper and fixable to stay old-school than to go high tech with the fuel injection. Besides if your looking to make upgrades along the way it will be cheaper with the carb. Consider a bigger carb as a simple upgrade..... for me I need larger Injectors ($300), the intake has to be machined out ($), larger throttle body ($200?) and the computer program needs to be made and re-flashed to the computer ($200 + labour).

10-27-2008, 07:11 PM	#3
OrrieG Registered User Join Date: Jun 2006 Location: Idaho Posts: 8,800	Re: Engine swap If you can, I would drag the whole donor rig home so you can get what you need, even if you know you don't need it yet, then scrap the rest. That is what I did with my truck this time so I don't have to be running around trying for find miscellanious stuff or fabricating something I can just unbolt.



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