Quote:
Originally Posted by scotthei05
I've been reading some other threads about having a 482 FE aluminum. It seems we're talking about approximately the same price or there abouts.
Questions:
427 SBF Aluminum weight vs. 482 FE Aluminum?
427 iron weight vs. 482 aluminum?
427 iron weight vs 482 iron?
Does anyone have the approximate weights? I want to say the 427 SBF Aluminum is about 475 lbs or so? Sound about right? How competitive would the 482 FE Aluminum be with a 427 SBF Aluminum (assuming both were set up well by a professional)? I'm talking track times both a road course and 1/4 mile times assuming everything else were similar with both cars minus the differences in the engines.
Would you expect to get 50K miles out of the SBF? Or more?
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Numbers I picked up here and there over the years, with no proof of accuracy
351W all cast iron 510 lb -- Block with main caps 165 lb
427FE all cast iron 670 lb
A Dart 351W is about 195 with no main caps, so block choice can make a difference. I have no data on aluminum blocks. Obviously aluminum in a FE will save more weight than a Windsor, as it is a bigger block. An aluminum FE will get you down near a cast iron Windsor, but an aluminum Windsor will be lighter yet.
It would seem to me that a 427FE head with the big valves would be easier to get flow out of than a SBF head. FE stuff costs a little more, so it would be hard to guess which head would cost more to get the same power out of them. Barry or Keith would know, as I am making a lot of assumptions.
In a Cobra, I think when the price and Hp is close to the same, a FE is the no brainer, from many points of view. If all out performance was the goal, I would go Windsor. If we were talking a newer Mustang, the Windsor. Just one opinion.
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