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BBC Aluminum vs Iron Head Question

Old 06-12-2009, 02:30 PM
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Default BBC Aluminum vs Iron Head Question

Just curious on the average what is the wieght savings between a set of BBC aluminum heads vs a set of BBC iron heads? While I have the 509 out of my 69 I was thinking about replacing the cast iron Merlin II rectangle port heads with a set of Merlin III aluminum heads. Just was wondering how much wieght that would knock off the front end?
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Old 06-12-2009, 03:53 PM
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Fully assembled iron 308 rectangle port, 70 lbs X 2 = 140
Fully assembled 308 pro 1 aluminum, 29 lbs X 2 = 58 lbs

This is just looking at what dart shows on there web site as weight
for there heads.

Last edited by Little Mouse; 06-12-2009 at 04:14 PM.
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Old 06-12-2009, 04:09 PM
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About 75.
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Old 06-12-2009, 05:32 PM
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actually you will save 70 lbs off the front end....fully dressed from iron to aluminum.
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Old 06-12-2009, 06:10 PM
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And if you're buying heads....I'd pick a better set. You can easily beat the Merlin's these days.

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Old 06-12-2009, 09:23 PM
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look at it this way. i replaced the iron heads with al on my 454.
i had to get help lifting them up off of the car.
the al ones i could lift onto the block with one hand
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