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kymeallion

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I have a 1994 GMC 1500 4x4 Sierra. I want to know if i can put a carb on it and an earlier style ignition. If so What all do i have to change out.
 
kymeallion said:
I have a 1994 GMC 1500 4x4 Sierra. I want to know if i can put a carb on it and an earlier style ignition. If so What all do i have to change out.
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You can't with a EFI system engine, unless your planing to use the Sierra as off road use only. You can not convert EFI engine to Carb engine and run them on the road.

Why do you want to go from fuel injection to carb? If your Sierra is a daily driver that is fairly stock then you are just wasting your time and money. Your gas mileage will decrease, you will lose some low end torque, you will lose some drive-ability, you will increase your exhaust emissions, and decrease the value of your car.

Don't get me wrong, a good well thought out carburated combo is a very good system. But if you are switching to a carb just to solve your problems with EFI you might be surprised. A carburetor requires work to get it right.

You may be trading in your problems for a whole new set of problems that you know nothing about. Before doing anything carefully weigh out your decision to remove the factory system from your Sierra. In the end I hope that whatever decision you make turns out to be the best for you and your Sierra. GOOD LUCK!!!

Mechanical Changes
Intake and Carburetor: Of course if you are converting from EFI to carb you must have an intake manifold and a carburetor. Just be sure to size the components to match your combination properly.

Fuel System: You will need a new fuel pump and pickup. Do NOT use the existing EFI pump. You can either use an electric low pressure pump designed for a carb (like the Holley red or blue pumps) or go with a mechanical fuel pump. In either case you must replace the fuel pickup on top of the gas tank with a purpose built pickup that does not include an in-tank pump.

Ignition: This distributor has a steel gear to be compatible with a roller cam. Also use a complete MSD distributor and box could also be used as a step up from the factory stuff.

Transmission: This is probably the most critical step of the whole process. If you have a manual transmission you have nothing to worry about. However Carburated engines can be joined to the 4L60-E by use of a GM Controller, #12497316. Carbureted engines will require a Throttle Postion Sensor. Setup is critical so follow the instructions included closely. Setting up the cable wrong will lead to a burned up transmission in very short order.

As for electrical there are lots of cutting and eliminating extra wire that is not needed to eliminate to keep any unwanted shorts.:eek:
 
Ok, I ran some test on my truck. Turns out I have a dead cylinder, nearly to no compression. I 'm just going to rebuild motor. However, I'm in need of some pointers. How do I know If i have a long block or short block? What type of camshaft should i go with. Don't want to build a stock motor, but don't want a monster. What type of piston rings should i use? Does anyone know of an engine kit that may be cheaper than buying piece by piece? Will that engine kit be balanced, all the pistons & connecting rods be the same weight? Plan to put an oil cooler on it.
 
Not to be mean here but.

If you don't know the differnce between a long block and a short block or engine balancing then you should not rebuild your motor on your own.(not being mean)
I suggest you have someone help you that knows how to rebuld motors or buy one right from your dealer. They have some nice ones (extra hp) motors that work quite nice.

If you do the rebuild wrong it will cost you way more to repair it in the end than if you just buy one. Just my 2 cents good luck
 
Not mean, just stupid! Thanks for answering my questions, NOT! This is a forum, they are made to help people. Thanks for your help!!! If you can't answer a simple Question Get off this site. Your 2 cents, thats all your worth! Can any one else answer these questions besides the peanut gallary.
 
kymeallion said:
Ok, I ran some test on my truck. Turns out I have a dead cylinder, nearly to no compression. I 'm just going to rebuild motor. However, I'm in need of some pointers. How do I know If i have a long block or short block? What type of camshaft should i go with. Don't want to build a stock motor, but don't want a monster. What type of piston rings should i use? Does anyone know of an engine kit that may be cheaper than buying piece by piece? Will that engine kit be balanced, all the pistons & connecting rods be the same weight? Plan to put an oil cooler on it.
Click to expand...

ok here are your answersyour looking for
how do you know if you have a long block or a short block = well all the blocks are the same. what makes a long block or a short block is how you buy it. Short block comes with block,crank shaft, and pistons and some times a camshaft. You need to supply the rest of the parts to make it a long block. A long block is a motor all ready to drop in after intake is installed.

what type of camshaft do you use. = well thats a big question and would depend on the cylinder heads you use valve size,rockers. valve spring , intake, and so on all has to be matched for best performance.

as far as engine balancing well i don't want to type all night so google it and read about it. you will learn alot anout engine balancing.

Again good luck:rolleyes:
 
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