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LT1 Heads

This is a discussion on LT1 Heads within the LT1 forums, part of the Vehicle Specific category; Is there a big performance difference between the stock aluminum heads on a Z and the cast heads on an ...

  1. #1
    Simpsons Did it!! 98formy's Avatar
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    LT1 Heads

    Is there a big performance difference between the stock aluminum heads on a Z and the cast heads on an Imp SS. A friend of mine needs new valves and springs and I got a deal a while back on a set of cast heads for a hundred bucks, but he kind of wants AFR's, but he's also on a tight budget. Just need some info so I know what to tell him.

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    Senior Member 5.0THIS's Avatar
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    Flow wise, no, but the irons heads weigh significantly more.

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    Junior Member fastz1995's Avatar
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    Quote Originally Posted by 98formy View Post
    Is there a big performance difference between the stock aluminum heads on a Z and the cast heads on an Imp SS. A friend of mine needs new valves and springs and I got a deal a while back on a set of cast heads for a hundred bucks, but he kind of wants AFR's, but he's also on a tight budget. Just need some info so I know what to tell him.
    Alum. heads have better heat transferring capabilities, so they also stay alot cooler and weight ALOT LESS for sure!!

  4. #4
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    You can run more aggressive timing w/ the aluminum heads before detonation

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