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Old 06-12-2009, 03:30 PM   #1
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Member Since: Nov 2000
Location: Johnston Iowa
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, 04:53 PM   #2
Little Mouse
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Member Since: Apr 2006

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 05:14 PM.
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Old 06-12-2009, 05:09 PM   #3
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Location: CORVETTE 77 385 C.I. TEXAS

About 75.

CORVETTE 77 385CI 6.3L Hi-Perf. FE-7 Sus.
GANEY Corvette Forum Site BB/SB Comp Cams Edelbrock RPM Holley DP Dynomax
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Old 06-12-2009, 06:32 PM   #4
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Location: Taylor Michigan

actually you will save 70 lbs off the front end....fully dressed from iron to aluminum.
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Old 06-12-2009, 07:10 PM   #5
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Member Since: Jan 2000
Location: Houston, Tx

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, 10:23 PM   #6
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Member Since: Jun 2008
Location: Rockledge FL

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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Old 06-12-2009, 10:23 PM
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