Mopar Action SB head article

Iron head vs aluminum head article. All things being equal, no difference to be found.

http://www.carcraft.com/techarticles/ccrp_0602_iron_versus_aluminum_cylinder_heads_test/index.html

When the results don't match the theory, get a new theory.

Here's the other thing I'd be interested to know. They supposedly had all these cylinder head gurus standing around. Did any of them offer speculation as to why the EQ head flows so much better?

In other news, the results do seem to be semi-confirmed by the "Iron Ram" information on Hughes' website. I did take a good long look at these heads at the Indy Heads swap meet this weekend, and they do appear to be a pretty high quality casting, especially for something that's available for $350 each on Ebay.

Something the article didn't point out is that they do still suffer from the shortcomings of the magnum heads. They need to be machined if you want to put a decent valve spring on them or run a decent amount of cam lift. They are also even heavier than stock Magnum heads. And while the article dissed the Edelbrocks for using Chevy rocker arms (and the stronger 3/8 inch adjustable stud mount arrangement), the only way to get adjustable roller rockers on these EQ heads is to buy a stud mount rocker conversion kit and a set of Chevy rocker arms, and it still won't be as strong as the Edelbrocks because the stud likely uses the existing 5/16 hole for the pedestal mount rockers.

All that said, the most useful piece of information in the article (if it's true) is that the Edelbrock Magnum heads do not in fact have a 58cc chamber. That would be pretty disappointing.

Steve