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Old 08-08-2006, 06:35 AM   #1
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Default pros & cons of aluminium piston liners in engines

hello
i just wanted to ask you guys what your thoughts were on aluminium piston sleeves in engines.

how do these compare to the typical brass sleeves ?

thanks
john
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Old 08-08-2006, 07:11 AM   #2
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The Aluminum sleeves wear out faster, but motors with Aluminum sleeves are usually insane fast.
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Old 08-29-2006, 08:06 AM   #3
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I am told, that it is more difficult to get the chrome to adhere to the aluminum. So it is more likely that an aac sleave will start to flake the chrome off.
Theory is, that the alum liner will expand and contract at same rate as piston & crankcase. Making it hold a tune better throughout the operating temp range. Weight is down too.
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Old 08-29-2006, 08:57 PM   #4
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When Sirio came out with their Al. sleeve engines, a lot of people had problems with the sleeves breacking prematurely, the same thing happend when Novarossi came out with their 421p Al sleeve engines. Someone on the forum mentioned that the problem was that the sleeve would get loose on the case and vibrate, causing it to break.
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Old 08-29-2006, 09:46 PM   #5
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the alm sleeve is so much faster with less bottom,will crack in time instead of wearing out.
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