>From: "Larry" <larry@larryembrey.com>
>Reply-To: "Larry" <larry@larryembrey.com>
>To: "Larry Hoy" <larryhoy@prodigy.net>, <DANMAS@aol.com>, "MG V8 List"
><mgb-v8@autox.team.net>
>Subject: Re: Ford 302 vs BOP/Rover 215
>Date: Wed, 20 Sep 2000 06:09:09 -0700
>
>I would tend to agree. Using my Intakes as an example, we get the
>following.
>
>Stock 2bbl Iron intake: 42lbs
>Aftermarker Alum intake: 15lbs
>This yields us a 2.8:1 ratio.
>
<lurk mode off> ;-)
The 2.9 factor is from comparing the densities of steel and aluminum: Steel
= 490 lb/cu. ft, Alum. = 170 lb/cu. ft
>I have a alum water pump on the way, once I get it, I will weight both and
>let everyone know. The Alum block HAS to save more than 30lbs, that just
>seems a bit on the low side now that I look at it. Probably means that the
>iron block weighs more than 127lbs..
Keep in mind aluminum is not as strong (depending on alloy) or stiff as
steel, therefore more aluminum is required to match the strength and
stiffness of steel. So, an aluminum block may require more material to match
the strength of the steel block, hence the disparity between the actual
block weights and the material weights.
Chad
'71 BGT - '94 Cobra 5.0 power in the works!
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