02-13-2015, 05:16 PM
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Senior Club Cobra Member
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Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,592
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Not Ranked
Quote:
Originally Posted by Detroit Bill
Yea for me losing 10 pounds is not inconsequential but that's all I need to lose. But I think it is significant because of where it is, up high and in the front. Have you ever put a cast iron head on an engine while it's in the car you might appreciate the significance more. Pull off a cast iron intake and the front rides high. You are trying to build a high performance car after all.
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I'm assuming the aluminum intake is there already, in the first place. Not many folks running a cast iron intakes anymore, unless it's a restoration of an original.
As I said, the weight savings is a rounding error. A Kirkham weighs around 2,100 lbs. An SPF weighs around 2,600 lbs. That's 500 lbs savings right there. Of course, for a higher price. There are lots of places to save weight, but the alloy heads should be purchased for flow, not weight savings.
Losing 20 lbs around the middle would do the same thing and you get the benefit of potentially living longer. Alloy heads can't do that. 
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