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The Terminator
Engine/Tuning
Cast iron block vs. Aluminum block
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<blockquote data-quote="SlowSVT" data-source="post: 3624475" data-attributes="member: 20202"><p>This is part of an article that might be of interest regarding this subject. </p><p></p><p>"Cast iron blocks can be counted on to maintain their integrity in high horsepower naturally aspirated, nitros and supercharged applications, and are even preferred by some hard core racers. For race or street the iron block does not come with the risk of block distortion that can be present in the lighter aluminum 4.6 blocks. This eliminates the issues that come with block distortion when trying to hold an engine together on the street or a long race season with out a rebuild.</p><p></p><p>The 4.6 aluminum blocks seen in Cobra from 96-98, rated at 305 horsepower, and 99/01, rated at 320 horsepower, and even the early Explorer 4.6 are effectively the same block. This block will work well for most street applications and can save the owner around 70 lbs of sprung weight. Lighter weight then the cast iron version they are prone to moving around, or distorting, when asked to produce big power. Later model Cobra cast iron blocks, 2003-04, rated at 390 horsepower, are significantly stronger and can be counted on for 700+ HP in their stock configuration with out the type of distortion seen in older aluminum block engines. These are modified Romeo blocks that have been clearanced to fit the extra center counterweights found on forged Cobra crankshafts."</p></blockquote><p></p>
[QUOTE="SlowSVT, post: 3624475, member: 20202"] This is part of an article that might be of interest regarding this subject. "Cast iron blocks can be counted on to maintain their integrity in high horsepower naturally aspirated, nitros and supercharged applications, and are even preferred by some hard core racers. For race or street the iron block does not come with the risk of block distortion that can be present in the lighter aluminum 4.6 blocks. This eliminates the issues that come with block distortion when trying to hold an engine together on the street or a long race season with out a rebuild. The 4.6 aluminum blocks seen in Cobra from 96-98, rated at 305 horsepower, and 99/01, rated at 320 horsepower, and even the early Explorer 4.6 are effectively the same block. This block will work well for most street applications and can save the owner around 70 lbs of sprung weight. Lighter weight then the cast iron version they are prone to moving around, or distorting, when asked to produce big power. Later model Cobra cast iron blocks, 2003-04, rated at 390 horsepower, are significantly stronger and can be counted on for 700+ HP in their stock configuration with out the type of distortion seen in older aluminum block engines. These are modified Romeo blocks that have been clearanced to fit the extra center counterweights found on forged Cobra crankshafts." [/QUOTE]
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Cast iron block vs. Aluminum block
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