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Thread: what's the difference?
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10-04-2004 #1
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what's the difference?
Does anyone know the weight difference between a big block chevy iron head and a small block chevy aluminum head? I’m thinking about swapping to save some weight.
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10-04-2004 #2dennis68 GuestB/B iron to S/B al head is at least 200lbs. Heads alone are 75lbs. Then you have the LS1 swap, that is another 150lbs. off the front clip.
Here are exact figures:SMALL BLOCK
all iron small block 520 lbs.
alum heads w/iron small block 480 lbs.
all alum motor 389 lbs.
BIG BLOCK
all iron BB 754 lbs.
alum heads with iron block 660 lbs.
all alum BB 501 lbs.
So, B/B iron head to S/b al head difference is 274lbs.
Last edited by dennis68; 10-04-2004 at 09:11 AM. Reason: exact figures
10-04-2004 #3
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soooooo
What I’m reading is if I swapped to an ls1, I’d shave off 365 lbs?
Holy Hell!!!
10-04-2004 #4dennis68 GuestGuess you have a new project. Don't forget when you are fabbing mounts you might as well set the motor back a few inches for some more weight distribution advantages.
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