How much do Vortec heads flow?
By Daniel Moore
How much do Vortec heads flow?
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 .
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 makes Vortec heads so good?
Types of GM Vortec 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.
Is it worth porting Vortec heads?
The Vortec heads offer great intake port flow despite the rather small 1.94-inch valves. This is often called pocket porting and the area just below the 45-degree valve seat is where you can gain the greatest airflow improvement for the least amount of effort.
Are Vortec heads aluminum?
Aluminum cylinder heads are standard on the ZZ4 and feature 58cc chambers, 1.94-inch intake valves, and 1.50-inch exhaust valves. The heads that were tested included the two versions of the Vortec Bow-Tie, as well as the GM’s Vortec truck head, Fast Burn aluminum head, and the stock aluminum ZZ4 production head.
How much horsepower do Vortec heads add to a 350?
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 is a valve spring seat?
valve spring in Automotive Engineering The valve spring is a coil spring used to hold the valve in a closed position. A valve spring’s job is to maintain contact between the cam follower and cam lobe throughout the motion of opening and closing.
What does a valve guide do?
A valve guide is a cylindrical piece of metal, pressed or integrally cast into the cylinder head, with the valve reciprocating inside it. Guides also serve to conduct heat from the combustion process out from the exhaust valve and into the cylinder head where it may be taken up by the cooling system.
