Quick Answer

Quick Answer: What CC are Vortec heads?

These large chamber heads shrouded the valves even more than the older 64-cc chambers and did nothing to improve airflow. Not so ironically, the Vortec returned to a 64-cc chamber mainly because the current trend for all engines is with smaller, tighter chambers to improve both flow and chamber activity.

What is a vortex head?

The Vortec line of cylinder heads was introduced by GM in 1988 as a V6 with a 4.3-liter displacement. This technology created a vortex or pressurized swirl of fuel and air mixture inside the combustion chamber that enables the engine to produce more power while still gaining a marginal amount of fuel efficiency.

How much lift can Vortec heads take?

The factory Vortec heads use a light, single-wire valvespring with a damper that generates between 70 and 80 pounds of load on the seat. Because these heads are meant to work with a 1.5:1 rocker, their tall valve guides can only handle maximum valve lifts of around 0.420 inch.

Are all Vortec heads the same?

Types of GM Vortec Heads

L31 Vortecs comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). Originally, the stock #906 casting head was available in two versions. One version had an Inconel exhaust seat with single angle valve grind and was available on one ton trucks.

How much HP do Vortec heads add?

Most of these small block Chevy heads offer a power increase of around 40 hp, and even the iron Vortec heads were worth 20 hp over stock. The two best small block Chevy heads in terms of peak horsepower were worth more than 60 hp.

How much horsepower do Vortec heads add to a 350?

Jeff Smith: We wrote about Vortec heads in 2016, and that article spawned this question. The original answer was related to modifying the heads to accept more valve lift. Our original answer combined the Chevrolet Hot cam with a set of these Vortec heads. Our estimate then and now is around 350-375 horsepower.

What’s the difference between a Vortec 350 and a regular 350?

The spark plug is located near the center of the chamber, which is designed to promote better combustion. The regular 350 head uses a 90 degree bolt angle, while the Vortec uses a 72 degree bolt angle.

Is a 5.7 Vortec a LS motor?

Although Vortec engines are “LS” based they are NOT LS engines IMO. Besides most Vortec’s being iron block, as seen above there are some serious size differences and considerations depending on your project. VORTEC ENGINE IN CARS: For the most part, it will be challenging to put a Vortec truck engine into a car.

What makes a Vortec a Vortec?

Vortec is a trademarked name for a line of gasoline engines for General Motors trucks. The name first appeared in an advertisement for the 1985 model year 4.3 L V6 that used “vortex technology” to create a vortex inside the combustion chamber, creating a better air/fuel atomization.

What is the biggest cam I can put in a stock 350 vortec?

050″. – The springs fit the vortex head without machine work. – Sounds meaner than the engine is. This camshaft satisfies all the requirements of Stock 350 and is the biggest one you can fit.

How do you cut Vortec valve guides?

Valve Spring Seat &amp
Valve Guide Cutting Tools

What headers fit Vortec heads?

standard sbc headers work fine on vortec heads.

What are double hump heads worth?

RIP: 2/16/2019. 461 and 462 double hump complete heads should be worth or priced at $200 a set at the very least. With all the choices in new motors and heads these do not have the interest they once had.

Do they make aluminum Vortec heads?

First of all, the World Products head is aluminum, rather than cast iron like stock Vortec heads. For compatibility, the World version maintains the standard 23-degree Chevy small-block valve angle and the 64cc combustion chambers, but uses 215cc intake ports, which are huge compared to a stock Vortec’s 170cc runners.

Can you put a carb on a Vortec 350?

You can use a carb intake for vortec heads, just get an intake made for vortec heads. A regular chevy distributor will drop right in. Chances are you’ll need to run an electric fuel pump since your block is likely not drilled for a fuel pump pushrod.

How much horsepower does a 1998 5.7 Vortec have?

How much HP does a 5.7 Vortec have? The Vortec generated 255 horsepower at 4,600 rpm and 330 foot-pounds of torque at 2,800 rpm, or the force required to move a vehicle forward.

Will Vortec heads fit a 327?

The L31 Vortec heads will bolt onto any Gen I small block. Your 327 isn’t any different than any other Gen I small block built from 1955 thru 2002. The main difference with using the Vortec heads is the different intake bolt pattern as already mentioned.

How much HP will aluminum heads add?

Depending on your cam, you can gain anywhere from 40-70hp. Cam and heads can gain you 100+hp.

How much horsepower does a cam add to a 350?

When a camshaft is installed, it is likely to boost your output by between 10 and 20 horsepower. Air intake manifolds, exhaust manifolds, injectors, and valve heads are some of the parts you need to replace in order to make full use of high-performance camshaft.

Can heads increase horsepower?

Buying a new head that has four valves per cylinder will dramatically improve airflow in and out of the engine and this can improve power. Using performance cams can also make a big difference.

What is the difference between TBI and Vortec?

They differ in several ways: TBI models have injectors positioned in front of throttle plates
Vortec models use speed density systems by putting the injectors out of sight of the throttle plates, whereas Vortec models use mass airflow to manage the fuel injection and injection system at the same time.

What year 350 has Vortec heads?

The Debut. From 1996 to 2000, GM truck and van 350 engines came equipped with L-31 Vortec cylinder heads.

Are all center bolt heads Vortec?

Center bolt does not always mean it is a Vortec head. You are correct on the intake and yes, exhaust manifolds interchange.

How much HP does a 5.7 Vortec have?

5.7 Vortec Transmissions

It is rated at 255 horsepower at 4600 rpm and 330 foot-pounds (lb-ft) of torque at 2800 rpm.

How much horsepower does a 1997 5.7 Vortec have?

The 5.7-liter Vortec V-8 engine, paired with a four-speed automatic transmission, is rated at 255 horsepower at 4,600 rpm and 330 foot-pounds of torque at 2,800 rpm.

Is 5.3 or 5.7 engine better?

IMO-The 5.3 is definately a faster motor but the 5.7 seems to handle weight better. My 5.3 averages about 17mpg while and I got about 15mpg with my 5.7. It is hard to get a good comparison though. The 5.7 was a Z71 regular cab, short bed with an auto and 3.73s.

Which is the best Vortec engine?

In some words, the V8 Vortec 5300 engine is one of the most reliable in the business. Over 80% of owners of vehicles with the engine have reported minor issues ranging from 220k miles or less.As well as durability, the engine blocks are very strong.

Will Vortec heads fit a Gen 1 350?

The 350 engine will take a set of vortec heads, as I have put a set of 96 vortec heads on a 350 out of a 90 corvette and they fit right up. The intake bolt pattern is different for the vortec heads and the right way is to purchase a different intake that aligns the holes properly.

How do I identify Chevy Vortec heads?

There is a different intake bolt pattern and an eight-bolt attachment for it. Vortec Head bolts are the most accurate way to differentiate them from regular 350 heads because they have a bolt pattern and a number casting.