How many CFM do Vortec heads flow?

230-cfm
He took a set of Vortec right out of the box and clamped them down to his Superflow bench. With 230-cfm max flow, these heads are actually pretty good, except when you notice that peak flow is at .

Why are Vortec heads better?

The L31 Vortec heads have larger ports than the older Gen I cast steel heads, so they outflow the older heads. The Vortec heads are a little bit lighter than the older heads and have a “kidney” or “heart” shaped combustion chamber that is more efficient than the double hump chamber.

Where are Enginequest heads made?

Cast in Australia with premium materials and machined to exact tolerances, the EQ Magnum cylinder heads accept production or aftermarket valvetrain components, intake manifolds and exhaust manifolds/headers.

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.

Which vortec heads are best?

706 heads are very affordable

706 heads are plentiful and easy to find

706 heads have smaller chambers,so you don’t lose compression

706 heads are slightly superior to 862 heads due to how they are manufactured

706 heads flow great and,overall,are superior to 317 heads for many builds

What are vortec heads?

1 Answer. The Vortec heads are a little bit lighter than the older heads and have a “kidney” or “heart” shaped combustion chamber that is more efficient than the double hump chamber. The L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). Originally, the stock #906 casting head was available in two versions.

What are eq heads?

The EQ heads are the formerly known ProTopline Lightning heads . They are now sold by Racing Head Service (RHS, Comp Cams) also, the EQ’s are sold unported and the RHS heads are CNC ported. The EQ’s are a very good piece, pretty much an eqaul to the Dart castings.

What is a Vortec 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.