Aluminum vs Cast heads
03-30-2019, 12:34 PM
#21
2nd Gear
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If you get the exact same head design but one in cast iron and one in aluminum the cast iron head will put out more horsepower. To run aluminum you should run one point in compression higher to make up for the lost power.
The problem is alot of the better designed/flowing heads are only made in aluminum so you are stuck with choice.
The weight difference is really noticable when you are removing/installing the heads and leaning over the fender. Takes 2 to lift off the old cast iron heads but no problem installing the lighter aluminum alone.
The problem is alot of the better designed/flowing heads are only made in aluminum so you are stuck with choice.
The weight difference is really noticable when you are removing/installing the heads and leaning over the fender. Takes 2 to lift off the old cast iron heads but no problem installing the lighter aluminum alone.
