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George Miller · 10-10-2015, 06:47 PM

Well I'm not sure how much weight you would save, depending on what kind of steel. You would have to make the alum bigger to have the same strength. 7075 is about 70,000 for tensile strength. If I was racing I would want steel like 4340.

Like most metals there are lots of grades and types of steel and alum.

10-10-2015, 06:47 PM	#53
George Miller Senior Member Join Date: May 2010 Location: NC Posts: 2,975	Re: 5 main, chev, crankModel A engine Well I'm not sure how much weight you would save, depending on what kind of steel. You would have to make the alum bigger to have the same strength. 7075 is about 70,000 for tensile strength. If I was racing I would want steel like 4340. Like most metals there are lots of grades and types of steel and alum.