Aluminium Sleeves
#1
Aluminium Sleeves
Hey guys, was wondering if anyone has experience with engines like the Max Powers and Hasi engines that have aluminium sleeves instead of brass? I’ve heard that the break in is a fair bit quicker but they also wear out a lot faster? Any merit to any of this?
cheers
cheers
#2
The one and only aluminum sleeve engine I ever had was many years ago and it was a bit of a disaster. Fast as hell though. Didn't last long enough to wear out
#3
Aluminium has a higher expansion rate than brass so the idea of a quicker break in is more by a higher expanded sleeve.
The wear has nothing to do with the aluminium sleeve because it is hard chromed so there should be hardly no wear on the sleeve unless the chrome is not that hard. Chrome plating aluminium is a bit difficult and so a different chrome could be used.
But because the sleeve expands more you can imagine that temperature changes can have an effect on the pinch zone. that can cause the wear.
But aluminium is a good heat conductor so you can run engines cooler or looking from the other side: leaner to run the same temps as with brass.
The wear has nothing to do with the aluminium sleeve because it is hard chromed so there should be hardly no wear on the sleeve unless the chrome is not that hard. Chrome plating aluminium is a bit difficult and so a different chrome could be used.
But because the sleeve expands more you can imagine that temperature changes can have an effect on the pinch zone. that can cause the wear.
But aluminium is a good heat conductor so you can run engines cooler or looking from the other side: leaner to run the same temps as with brass.
#4
Aluminium has a higher expansion rate than brass so the idea of a quicker break in is more by a higher expanded sleeve.
The wear has nothing to do with the aluminium sleeve because it is hard chromed so there should be hardly no wear on the sleeve unless the chrome is not that hard. Chrome plating aluminium is a bit difficult and so a different chrome could be used.
But because the sleeve expands more you can imagine that temperature changes can have an effect on the pinch zone. that can cause the wear.
But aluminium is a good heat conductor so you can run engines cooler or looking from the other side: leaner to run the same temps as with brass.
The wear has nothing to do with the aluminium sleeve because it is hard chromed so there should be hardly no wear on the sleeve unless the chrome is not that hard. Chrome plating aluminium is a bit difficult and so a different chrome could be used.
But because the sleeve expands more you can imagine that temperature changes can have an effect on the pinch zone. that can cause the wear.
But aluminium is a good heat conductor so you can run engines cooler or looking from the other side: leaner to run the same temps as with brass.
#5
Tech Adept
I’ve been running both the Max aluminium and Hasi aluminium for some time now.
Both engines break in easier.
Both run cooler (5-10deg).
Both so far have held up extremely well. Most of the damage with any engine is done during the break in stage, so that’s the big benefit I think with these new style engines.
The bad wrap aluminium engines get was from the Sirio days 15-20 years ago, they were fast but didn’t last. Technology has come a long way since then.
Both engines break in easier.
Both run cooler (5-10deg).
Both so far have held up extremely well. Most of the damage with any engine is done during the break in stage, so that’s the big benefit I think with these new style engines.
The bad wrap aluminium engines get was from the Sirio days 15-20 years ago, they were fast but didn’t last. Technology has come a long way since then.
#6
I’ve been running both the Max aluminium and Hasi aluminium for some time now.
Both engines break in easier.
Both run cooler (5-10deg).
Both so far have held up extremely well. Most of the damage with any engine is done during the break in stage, so that’s the big benefit I think with these new style engines.
The bad wrap aluminium engines get was from the Sirio days 15-20 years ago, they were fast but didn’t last. Technology has come a long way since then.
Both engines break in easier.
Both run cooler (5-10deg).
Both so far have held up extremely well. Most of the damage with any engine is done during the break in stage, so that’s the big benefit I think with these new style engines.
The bad wrap aluminium engines get was from the Sirio days 15-20 years ago, they were fast but didn’t last. Technology has come a long way since then.
#8
#10
RB Xenon R was a fantastic engine!!