I never said they were the ultimate.




Anyways, here's some substantion, in the words of David Vizard, under the header 'Thermal Coatings';-





and for a clearer answer in case you didn't quite understand what David was driving at, here again in the words of Bill Hancock & Harold Bettes;-



As I was saying, alloy has it's place, but for HP, Alloy ain't it.

Now, if you have information or whatever that says that Alloy Heads make better HP than Iron, put it up, we'd all like to read it.

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You seem to be missing a very big factor in all of this. It would be quite funny if you weren't so serious.

Why do they water cool heads? (talking typical car heads)
What happens if you suddenly decide not to water cool your head? (sudden water loss, etc.)
What happens to the combustion process if the head overheats? (or even rises 20° above normal)
Is there any reason would you want to remove the heat quicker by using a more conductive material?

You can usually run higher compression with an alloy head for the same quality of fuel due to the better cooling. More compression = more power.

But what would I know, I am only a concrete truck driver.

By the way, nice signature.

I think where the alloy head guys go wrong, is their heat treatment only goes 60thou.

Where as the cast ones are 75thou.

The added heat treatment helps to stop brittleness, i have some test papers here somewhere on an old iron head. I'll upload in the morning

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You're so square
Baby I don't care

Question.

Where did I say that either were better???

Exactly

From the above scanned article it says you have to run higher compression if you want the same power.

How do you know the scanned article is correct?

MG, don't bother with these people, they are deaf and one has been dropped on his head. You can tell them, and explain it in simple engineering terms and even provide proof, however they still want to argue and call forum members nasty names then go on to swear on the forum, all because they are not getting their own way and try to have threads locked or pulled. They have next to no interest in the topic at hand.

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I think we should send this off to the lab to be tested....it seems to be the only way to sort these issues out!

You know something, you are right for the first time ever. You are obviously so much smarter than us so there is no point in you even bothering to post here.

Ha!!! I hear you but there is no need. It is blaitant that he has been dropped on his head!

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Clearly there are a few sore losers left over from the last debate.

I think the debate and lab testing has been good! It finally put's some myths to bed. That said, I think most of the new and repro parts today are made of soft cheese and don't fit properly anyway, so I think I will stick with the old cast iron stuff!

i lol'd

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tim
68 Deluxe 1293, HIF44, megajolt/EDIS4, daihatsu alternator..

'a mini is for life, not just for christmas!'

It's not that they have no interest. It's not that you are wrong. It's not that they are wrong. It's that you come across as arrogant, patronising, condescending and unwilling to accept any other point of view. You may well be right, but the manner in which you go about proving yourself is ridiculous.

And this is coming from someone who has no idea about any of this but loves learning about it all. You may be right, but I'd still rather go to GR, Morris, Dr Mini, Mr Rosenthal for advice as they don't come across as being arrogant etc.

blatant.

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tim
68 Deluxe 1293, HIF44, megajolt/EDIS4, daihatsu alternator..

'a mini is for life, not just for christmas!'