What is the GM vortec engine and why is it good/better than other engines?

Question

I have a vortec in my 2002 Blazer and my friend says they are really good engines. What makes them so good? Its a V-6

Answer 1

Vortec is GM's name for their engines that use Port Fuel Injection. Before Vortec was introduced in 1996, GM Trucks used Throttle Body Injection or TBI for fuel delivery. It was basically taking the idea of a Carburetor and adding fuel injectors at the top where the air mixed, so that it was more controllable. This helped to prevent things like vapor lock. However, in 1996 the injectors were moved from the air intake area to directly in the cylinder, GM called it Vortec. There are two versions of Vortec, Sequential Port Fuel Injection and Multi-Port Fuel Injection. The latter is what is used in todays applications. Vortec and other fuel injected engines allow for total computer control of fuel mixture and therefore increase power and theoretically efficiency of an engine. Though from my personal experience I've found that earlier Vortecs engines 1996-1998 were good for power, but slightly worse for mileage compared with TBI.



You only see Vortec engines in GM trucks, they still based on the Chevy Small Block Overhead Valve or Pushrod engine and are known for their durability.



Other manufacturers also name their engines for instance Ford Pickups are typically powered by either a Triton V-8 or a Power Stroke V-8. And Chevy also calls their Diesel engines Duramax.



So there you have it, Vortec is just GM's name for either Sequential Port Fuel Injection or Multi-Port Fuel Injection. The idea with the name Vortec is that GM's system creates a mini twister that supposedly mixes the gas and air better, now I'm not sure if it actually does this, but it sure does sound good.

Answer 2

Vortec is just GM's brand name for their truck engines. Ford uses Triton. Chrysler uses Magnum and Hemi. Nissan uses Endurance.



The 4.3 V6 is an excellent engine. Its well designed even if its not the most powerful thing around anymore. They make a lot of low end torque, get good mileage, and are very reliable. Its basically an old 350 with 2 cylinders cut off.

Answer 3

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RE:

What is the GM vortec engine and why is it good/better than other engines?

I have a vortec in my 2002 Blazer and my friend says they are really good engines. What makes them so good? Its a V-6

Answer 4

I currently own a 1999 Chevy S-10 pickup with V6 Vortec engine, and I have to say, it's been fantastic. I used to own a 1994 GMC Sonoma with the same kind of engine, and I basically ran the wheels off of it. That particular engine gives great gas mileage on the open road (not as well for local driving, though), and is very powerful. I average about 30mpg highway miles. My current truck has nearly 207,000 miles on it, and it still runs like a new one. I wouldn't have any other kind of vehicle at all.

Answer 5

The guys above are very wrong. The vortec engine was actually produced in 1985 when the 4.3l was produced. "Vortec" actually has nothing to do with what kind of injection system is on the motor. Vortec is the design in the heads. And comes about when gm started using vortex technology. The air and fuel mixture is swirled to get better fuel atomization.

Answer 6

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sounds to me like 2 different problems. focusing on the lean condition, i've seen many 4.3 engines have intake gaskets leaking, pulling in unmetered air into the combustion chamber. this added air consequently increases the idle speed slightly. the iac valve will try to compensate by lowering the iac, but it goes down beyond a calibrated value, and might be setting that code. as far as the egr goes, most of the time it is the result of carbon deposits causing the pintle to stick

Answer 7

The Vortc design refers to the complete motor but in all reality the cylinder heads are what makes them tick. The shape of the combustion chamber promotes great fuel / air complete burning. There are now two different small block Vortec cylinder heads. Pt.# 25534421 has 185cc intake runners and 77cc exhaust ports. Pt.# 25534446 has 225 cc intake runners and 77cc exhaust ports.



In your case Chevrolet makes a couple of 18 degree aluminum cylinder heads for competition purposes for your V6 motor.

Answer 8

yea vortec engines kick *** and the only thing i have ever seen go is the water pump. my father has a chevy express 3500 van with a 7.4L vortec (i think) and the only problem he has had with it was the water pump went at about 90 or 100 thousand miles and now he has over 125,000 could use a tune up but it still runs great. it is a fantastic engine.

Answer 9

Questions please: Got a "96 Chevy S- 10; 4.3 Vortec Engine. Its a tough 4x4 powerhouse. P'O'es me off that in 4x4 - ONLY the easyiest 1 in front & 1 one in rear wheels turn; the ones I DON"T need to pull. I:E: Get stuck- wheels that spin are ones Not needed! But- ! I'll bet I can beat any 8 cyl 4x4 trucks in 1/8th mile. Info would be thankful.

Answer 10

HAVING HAD 3 OF THEM, I CAN TELL YOU SHORT OF THE WATER PUMPS --THEY ARE GREAT MOTORS. THEY WILL GO OVER 200,000 ON AVERAGE. THE VORTEC--BE IT A TRADE NAME-- IS A STEP ABOVE THE OLD STYLE SMALL BLOCKS FOR AIRFLOW AND RELIABILITY. THEY DO A BETTER JOB BURNIG FUEL MORE COMPLETE AND THE HEAD RUNNES ARE A BETTER SHAPE ALONG WITH INTAKE RUNNERS BEING MORE FITTED FOR THE USE THEY WERE DESIGNED FOR . YOU HAVE A V6 AND IS VERTUALLY THE SAME AS A 350 SHORT A COUPLE OF CYLINDERS . SAME BORE SAME CRANK BUT SHORTER. A VERY GOOD MOTOR AND THEY CAN BE MADE TO RUN VERY WELL WITH THE RIGHT MODS...