Mopar Action SB head article

Very interesting!

Notice the cam they were using was pretty big..550 lift and 260 duration solid is nothing to sneeze at. Would bleed a fair amount of pressure out,but even so they had 185 cranking psi.

I think aluminum is being used mainly as a weight saving material. After all,it is much more expensive to produce than cast iron. Just my opinion...

The article does mention that they never came close to detonation with either head. Both heads have the modern fast burn heart shaped chamber (like a magnum or gasp! vortex). Maybe todays blended gasohol resists detonation much better and thus thier comparison is invalid? Dunno,I am ignorant here.

So does this mean that I would run out and spend $1500 for aluminum heads as compared to maybe $900-$1000 for EQ irons? Depends on your wallet I guess. For an all out track car I'd go aluminum,as long as the heads flow. For a street /strip car that doesnt see a lot of track time,Id stick with cast iron.