The Best Flowing Vortec Casting?
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Joined: Sep 2002
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From: Poland
Car: '89 GTA
Engine: a bunch of pieces
Transmission: still there - very stockish TH700
The Best Flowing Vortec Casting?
Hi, I've read somewhere that Vortec 062 heads flow better on exhaust than 906's, is that true? Is there any other V. casting which's better for performance applications?
Mike
Mike
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Joined: Sep 2002
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From: Poland
Car: '89 GTA
Engine: a bunch of pieces
Transmission: still there - very stockish TH700
that's from CHP Magazine:
For you junkyard hunters, be forewarned that some ¾- and 1-ton trucks came with Vortec heads equipped with a specially hardened exhaust seat that kills low- and mid-lift flow. Casting number 10239906 should be avoided.
For you junkyard hunters, be forewarned that some ¾- and 1-ton trucks came with Vortec heads equipped with a specially hardened exhaust seat that kills low- and mid-lift flow. Casting number 10239906 should be avoided.
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Joined: Apr 2002
Posts: 3,552
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From: New Jersey
Car: 86 Corvette, 89 IROC, 1999 TA
Engine: 350, 350, LS1
Transmission: 700r4, 700r4, T-56
Axle/Gears: 3.07, 373, 4.10
yup, do a search there was a big discussion on that topic before, CHP later admitted they were wrong with that statement and took it back. its completely untrue.
didn't do my homework before posting - found everything in old threads... thanks guys! 
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