Are Mopar 906 heads good?

Are Mopar 906 heads good?

While 906 heads do perform well when ported, the labor involved with hand-porting these heads, combined with the cost of new valves, springs, etc, has made it more economical in most cases to simply buy a new set of aluminum aftermarket cylinder heads.

What did L31 heads come on?

Starting in 1996, on several GM Trucks and Vans, the L31 Vortec heads came on the scene. Not just a modification of existing heads, but complete redesign using the 1996 Caprice/Impala SS LT1 cast-iron head castings as a base.

How many cc’s is a Vortec head?

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.

Are 915 heads good?

For a Mopar big-block, the ’67-only 915 head is the most desirable of all junkyard and swap-meet finds because of its good port design, larger valves, and closed combustion chambers. Earlier heads had the quench-friendly closed chambers, but small valves and ports, and later heads went to an open-chamber design.

What CC are Mopar 452 heads?

The 516 CC look WAY smaller as a combustion chamber than the 452 heads I have (88cc) do. Here’s the rest of the build.

What years have Vortec heads?

The Debut. From 1996 to 2000, GM truck and van 350 engines came equipped with L-31 Vortec cylinder heads. Built of cast iron, these powerhouse heads upped the horsepower of these engines by magnitudes.

What engines came with Vortec heads?

The Vortec line of engines, I4, I5, I6, V6, and three V8 versions, were introduced by General Motors in the mid-90s.

Are 441 heads any good?

441 heads are good flowing heads. You just have to calculate the amount to make them usable. That is the benefit of aftermarket heads. But I used them with a good piston to build compression and 2.02/1.60 valves and made about 465 hp out of a 355 with them.

What is the difference between a Vortec head 062 and 906?

The only difference between the #062 and #906 Vortec head is in the exhaust seat of the HD/1-ton truck #906 version, as described above. The #062 has a 3-angle grind on a standard induction-hardened seat, as does the non-HD #906 head. The 062 does flow slightly better on the exhaust side at low lifts but the advantage over a 906 is very slight.

What is the difference between 906 and 9062 casting heads?

The #906 casting head was available in two versions. One has an Inconel exhaust seat with a single angle grind, and the other has the conventional 3-angle grind on the exhausts as per the #062. The #906 with Inconel seat does not intrude into the exhaust port.

What kind of heads does a 1996 Chevy 350 have?

These newly designed for 1996, state of the art heads are made from cast iron and replaced the former swirl-port TBI heads that had been previously used on the GM truck 350. Instantly the HP rating increased 55HP to 255 HP primarily from the power of these cylinder heads. What makes Vortec heads any different from other GM steel heads?

What kind of head does a visualvortec head have?

Vortec heads were designed based on the 1996 Caprice 9C1/Impala SS LT1 cast-iron head castings. The only difference is the water jacket revision so these heads could be used on conventionally-cooled small blocks. The 1996 LT1 cast-iron head was the highest-flowing LT1 head used by GM.