Lower weight. Aluminum is also easier to cast and modify. Iron still produces more
power, it's a trade off.
Performance replacement heads produce more power than OEM dime-a-dozen heads
no matter what materiial they're made of.
Dr. Pat
durling@attglobal.net wrote:
> Just one curious question though. Why is it that every high performance car (i'm
> talking factory for the street) uses aluminum heads. The V10 in the viper has its
> roots in the V10 truck engine but it has aluminum heads. I think ther might be
> more to it. I am not an engineer just seems viable to me.
>
> Jeff Durling
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