What is the difference between 906 and 062 Vortec heads?
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.
What do Vortec heads flow?
In 1996, GM incorporated the port design from the very successful iron LT1 engines used in the Impala SS, which was improved over the aluminum LT1 Corvette and Camaro engines. In essence, the Vortec head uses the iron LT1 chamber intake and exhaust ports in a standard-water-flow iron head.
Are 906 heads good?
Badvert65 Well-Known Member The ‘906’ heads were the standard head casting for all RB and B engines from 68-72(ish). They are good heads and were used on everything from 383 2-bbl engines up to and including the 440-6bbl engines. No difference in the heads. The cam, crank, pistons, etc are what made the differences.
How much do camel hump heads flow?
Typical Camel humps only flow 195 CFM. There may be some castings that flow 203-205 CFM but the Vortec out flows all of them out of the box. Porting can increase the flow of either head but typically costs more than just buying better heads. You can pay around $1,200 for a good professional porting job.
Why are Vortec heads better?
The Vortec head is without a doubt engineered towards producing more power, torque and engine response while improving overall fuel economy. If you plan to change or modify the head of the 350 engine in your car, installing a Vortec head alone will yield positive effects in your quest for power and speed.
Does aluminum heads increase HP?
Depending on your cam, you can gain anywhere from 40-70hp. Cam and heads can gain you 100+hp.
How many cc’s are 906 heads?
Though factory chamber volume is 79 cc’s, the CNC ported 906 chamber volume is increased to 86 cc’s. Hardened valve seats are available at the customer’s request, and the heads can be further milled to reduce chamber volume if needed.
What are 440 906 heads?
The ‘906’ heads were the standard head casting for all RB and B engines from 68-72(ish). They are good heads and were used on everything from 383 2-bbl engines up to and including the 440-6bbl engines.
What is the difference between a 906 and 906 Vortec head?
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.
Did the Vortec 906 outflow the old bowtie heads?
The early Vortec 906 castings with the 170 runners may not have out flowed the old phase 2 Bowtie heads but on the dyno and on the circle track they out powered those old school heads. Raised ports, Port bias, spark plug location is near the center of the cylinder as they call those the fast burn chamber.
What is the maximum clearance for a Vortec valve lift?
Retainer to guide clearance is the primary Achille’s Heel of the Vortec. For valve lifts above .460″ they need to be checked for R-G clearance. This varies from head to head. Some find they can get .480″ and slightly more valve lift fine. Others will find .460″ about the limit.
What is the casting number for vortec heads?
Dirt, awesome Vortec info as usual from you. I believe the new GM Vortec Heads are casting number ‘060’ but they retain the ‘062’ characteristics like you mentioned. What are those EQ heads you made reference to?