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| Home > Technical Chat > warning odd idea.. using the third cam on a bimmer | |||||||
 510 Posts Member #: 1592 Smart Guy! mainland europe near ze germans |
13th Sep, 2007 at 06:01:29pm
Hi,
That sir, is not rust, it is the progressive mass reduction system
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 6274 Posts Member #: 509 Post Whore Isle of Man |
13th Sep, 2007 at 06:06:41pm
how would this help the crank?
"Turbo's make torque, and torque makes fun"
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450 Posts Member #: 449 Senior Member Oxford |
13th Sep, 2007 at 06:15:20pm
nice idea but the first thing most people do with engines with a balance shaft in is to remove the balance shaft to reduce rotating mass. Not a bad idea for a road car for everyday use though. |
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 11046 Posts Member #: 965 Post Whore Preston On The Brook |
13th Sep, 2007 at 06:16:12pm
I would have thought the mathematics involved would be well out of the scope of the amature engine builder.
On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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 7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
14th Sep, 2007 at 07:50:16am
MMM I like.. Good idea. Dave, fix it! On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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 1849 Posts Member #: 672 The oversills police Oslo, Norway |
14th Sep, 2007 at 08:46:30am
pardon me, but to remove higher order unbalance the shaft would have to go double the speed or even four times the speed, the crank goes half the speed...
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 861 Posts Member #: 951 Post Whore Bromsgrove |
14th Sep, 2007 at 09:48:45am
Honda use balancer shafts.The principle is old.Think its called a Lanchester balancer,runs at twice crank speed. 'Where does the engine go?' |
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7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
14th Sep, 2007 at 09:54:18am
On 14th of Sep, 2007 at 08:46am miniminor63 said:
pardon me, but to remove higher order unbalance the shaft would have to go double the speed or even four times the speed, the crank goes half the speed... I think I am right on this one? Change the sprockets then, and modify the oil pump. Try seeing solutions Andrè 
On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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861 Posts Member #: 951 Post Whore Bromsgrove |
14th Sep, 2007 at 10:03:52am
Just checked this,Mercedes also use it,but Lanchester were first in 1911.Even before my time.You need 2 contra rotating shafts running twice crank speed.The weights cancel each other at one point in the cycle,but provide a counter balance at the right moment. 'Where does the engine go?' |
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1849 Posts Member #: 672 The oversills police Oslo, Norway |
14th Sep, 2007 at 10:22:27am
yes thats what I seem to remember from combustion engine class steve. I think this may prove very difficult to do tbh.... |
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 2521 Posts Member #: 417 Post Whore Swindon |
14th Sep, 2007 at 11:50:18am
I thought the balance shaft rotated the opposite direction to the crank
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715 Posts Member #: 1381 Post Whore Doncaster, South Yorkshire |
14th Sep, 2007 at 12:14:48pm
And how would it fit through the cam bearings if it had balance weights attached?
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1849 Posts Member #: 672 The oversills police Oslo, Norway |
14th Sep, 2007 at 12:24:24pm
nice point, and there is not much space around the cam for the counterweigths, its already troublesome when you fit an 8 porter (cam hits rods). I am not too sure about how the bearings would tackle double the speed and more weight either... Edited by miniminor63 on 14th Sep, 2007. |
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7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
14th Sep, 2007 at 12:35:39pm
The bearings would live. One should be led to believe that a balancer was infact balanced On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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1849 Posts Member #: 672 The oversills police Oslo, Norway |
14th Sep, 2007 at 12:37:46pm
it would have the same imbalance as the thing its supposed to balance out, just opposite.... |
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