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Author Topic:   vortec head questions
neil rucker
Member
posted March 02, 2003 09:28 PM
need info on vortec heads. are there more than 1 number of these? what is the diffrence? which one is the best? why? which fel-pro head gasket to use? which intake gasket? are regular 1.5 ratio harland sharp rockers ok? do they require a diffrent style do to valve cover mounting bosses? need help! thanks alot. neil


jnewman44
Member
posted March 02, 2003 10:12 PM
Don't use 305 vortec heads (small runners),
use any head gasket (I'm trying copper this year,there reusable),
use the specific vortec intake gasket(watch torque specs,there very low,
regular rockers are ok, but have guide plates, If you dont have guide plates you need self aligning rockers.
Vortecs do require a special intake too.
I'm runnin' vortecs this year, they take so many modifications to make them ready its almost worth it to buy some bare Darts or Pro Tops for around $550 new.(a pair!)
Buy the time you cut em for larger valves,***** in studs, larger springs,retainer clearance, drill pushrod holes,clean up the chambers and port em you could have bought the aftermarket that accepts a standard intake, valve covers, large springs, large valves, ***** in studs.
Need I say more(but if rules dont allow)
Chevy High Performance Magazine has lots of tech info on vortecs, good luck.


neil rucker
Member
posted March 02, 2003 10:31 PM
thanks for the info! we have to run 1.94 and 1.5 stainless valves, multi angle valve job, (no blending) no porting or polishing, ***** in studs, guide plates, stock diameter springs, any retainer. what # head do i need? thanks neil ps. no cc rule, no angle milling though.


jnewman44
Member
posted March 03, 2003 10:34 PM
I think both 062 and 906 are good castings, check for cracks the castings are light.


hughes
Member
posted March 05, 2003 05:22 PM
The 062 are the better of the 2 castings. The 906 casting are off trucks and have a hardened exhaust seat. The hardened seat will lose some flow on low lift.


rico 08
Member
posted March 05, 2003 06:37 PM
I was told the 062 are bare heads purchased from GM and the 906's are original factory peices put on motors and installed in trucks/cars.


fastrack1
Member
posted March 05, 2003 07:14 PM
CALL WHEELER MOTORSPORTS IN JACKSONVILLE FL AT 1 888 389 4414 THEY HAVE THEM READY TO GO ON STREET STOCKS FOR LESS THAN 800.00 @ WHEELERMOTORSPORTS.COM ASK FOR MARK BONI OR SHELTON THEY ALSO SUPPLY HEADS TO PACE GM PERFORMANCE

[This message has been edited by fastrack1 (edited March 05, 2003).]

Dixon
Member
posted March 05, 2003 08:06 PM
Scoggin Dickey sells some Vortec heads (1.94,1.50) that come complete with a valve-spring upgrade (Z-28) that allows them over .550" lift for about $600 a pair. I believe the O.D. of these springs are the same as the original, just the valve guide has been machined down. Even if they are a little wider you might be able to argue them as being legal, since they are "stock" springs.
I can't think of the part#, but there's a link to their site on the forum.

Dixon

jnewman44
Member
posted March 05, 2003 09:08 PM
According to Chevy High Perf. both 906 and 062 castings are good. They too had previously thought that the 906 was inferior. But there latest article corrected all that.


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