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The Terminator
Engine/Tuning
Cast iron block vs. Aluminum block
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<blockquote data-quote="jonas" data-source="post: 1919295" data-attributes="member: 9576"><p>Ok first paragraph. I vaugly recall issues with film contact with aluminum and needing special coolant that broke down surface tension of water to "wet" the aluminum better for aluminum engines/radiators (now all modern coolants run fine with aluminum engines/radiators) </p><p></p><p>The 2nd paragraph I agree and disagree at the same time because it depends on application. On an N/A 5.0 at stock 9.0 compression you would get less hp out of an aluminum head than an Iron head if the casting was exactly the same. For a blown/turbo/nos/highcomp car you want to get rid of as much heat as possible because you are now making loads of it. This is from my old school 5.0 days. We ran Iron blocs and aluminum cylinder heads. (remember the twisted wedge rage? oh I miss those days <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" />) Ford gave us aluminum cylinder heads for that reason.</p><p></p><p></p><p>3rd paragraph. They dont make copper radiatiors, they make them copper/brass allow because copper alone is too soft (copper is one of the components in the brass alloy). aluminum is actually worse than brass for radiator material but its not much different but its weight savings over brass is something like 3 to 1 (just an educated guess I didnt look it up but its a huge diff) and automobile manufacturers have pretty much gone all aluminum for weight savings for fuel economy. the copper/Brass alloy is also MUCH less corrosive than aluminum. This is probably the only thing i have to 180 disagree with you on. I do agree that copper by itself is highly reactive and will oxidize much more easily that aluminum. One of the reasons you must check and verify at least back in the day of your coolant was compatible with aluminum radiators/blocks for additives that protect aluminum and lower water surface tension to allow proper thermal conduction between the aluminum and the coolant.</p></blockquote><p></p>
[QUOTE="jonas, post: 1919295, member: 9576"] Ok first paragraph. I vaugly recall issues with film contact with aluminum and needing special coolant that broke down surface tension of water to "wet" the aluminum better for aluminum engines/radiators (now all modern coolants run fine with aluminum engines/radiators) The 2nd paragraph I agree and disagree at the same time because it depends on application. On an N/A 5.0 at stock 9.0 compression you would get less hp out of an aluminum head than an Iron head if the casting was exactly the same. For a blown/turbo/nos/highcomp car you want to get rid of as much heat as possible because you are now making loads of it. This is from my old school 5.0 days. We ran Iron blocs and aluminum cylinder heads. (remember the twisted wedge rage? oh I miss those days :)) Ford gave us aluminum cylinder heads for that reason. 3rd paragraph. They dont make copper radiatiors, they make them copper/brass allow because copper alone is too soft (copper is one of the components in the brass alloy). aluminum is actually worse than brass for radiator material but its not much different but its weight savings over brass is something like 3 to 1 (just an educated guess I didnt look it up but its a huge diff) and automobile manufacturers have pretty much gone all aluminum for weight savings for fuel economy. the copper/Brass alloy is also MUCH less corrosive than aluminum. This is probably the only thing i have to 180 disagree with you on. I do agree that copper by itself is highly reactive and will oxidize much more easily that aluminum. One of the reasons you must check and verify at least back in the day of your coolant was compatible with aluminum radiators/blocks for additives that protect aluminum and lower water surface tension to allow proper thermal conduction between the aluminum and the coolant. [/QUOTE]
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Cast iron block vs. Aluminum block
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