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| dgardel Member Since: 30 Nov 2008 Location: Veneto (Heart & Head) Posts: 3586  
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ALS or BANG BANG SYTEM how to work
it's principally work on petrol car where you can "spray" fuel when the throttle is closed and control the amount of fuel came out from the exhaust valves It's impossible to apply in a diesel engine (remember the diesel engine is a "self combustion engine" , petrol need spark plug, in a diesel engine you haven't throttle valves, you haven't the possibility to switch off the spark plug because you haven't the spark plug,.....) Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition 
IID Pro MV License |
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7th Dec 2009 11:24pm |
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| Zinke Member Since: 27 Jan 2009 Location: Scunthorpe Posts: 670  
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Think hes on about a dump valve to keep the turbo spinning as you change gear?
Ive heard of it done on a few diesel cars but not a land rover, it must be possible but how much it will benefit performance i dont know. |
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8th Dec 2009 12:43am |
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| chalky Member Since: 09 May 2008 Location: Yorkshire Posts: 483 
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No, ANTI LAG is nothing to do with the Wastegate.
Anti lag is as far as i am aware a crude method of keeping the turbo spinning by dumping un metred fuel and air in the inlet manifold pre combustion which in turn gets burnt creating the pop and bang at the business end, apart from looking good it has its benifits in assisting launch control and also holds the turbo on boost whilst sliding or partaking in the old scandanavian flick. Listen to the cars go off the line on a rally stage and you can hear the anti lag kicking in, just holding the revs at 6K wont help as the thing will just bog down off the line as there is no boost just good old fashioned Lag. Its OK for the big Rally teams "or not" as more recently most have folded, because if a turbo blows it gets replaced, the downside of popping and banging is blown turbos or the impellers detonating and getting sucked thro the cylinder head.......... I had a UR quattro some time ago which had the crudest means of Anti Lag installed and my god did that thing shift off the line, DEFENDER XS CSW 08 TONGA GREEN |
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8th Dec 2009 1:27am |
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| Glynparry25 Member Since: 16 Feb 2009 Location: Miserable Midlands Posts: 3015  
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There is only 1 reason people put a dump valve on a derv and that is for the sound......and show off. Even on a petrol car a BOV is pretty pointless, all it does is save the turbo for a few more thousand miles. Glyn |
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8th Dec 2009 7:21pm |
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| discocuzzy Member Since: 16 Jul 2008 Location: surrey Posts: 1200 
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Oi
 was the nuts on my imprezza RB5 limited edition!  but as im not welsh, i was trying to woo proper chicks, not sheep! You cannot teach stupid people to do clever things |
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9th Dec 2009 1:44am |
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| willy eckerslike Member Since: 15 Jun 2009 Location: North yorks Posts: 1789 
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Yeh............but our sheep are better looking than your chicks
 Original Member Pie n Pea Club.
110 HCPU Tipper |
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9th Dec 2009 7:48am |
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| discocuzzy Member Since: 16 Jul 2008 Location: surrey Posts: 1200
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You may have a point there Pete! You cannot teach stupid people to do clever things
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9th Dec 2009 10:05am |
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| willy eckerslike Member Since: 15 Jun 2009 Location: North yorks Posts: 1789
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Sorry Higgers, you've been hijacked
yeh and spit roasting a sheep is far better for you, specially if you cook it afterwards Original Member Pie n Pea Club. 110 HCPU Tipper |
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9th Dec 2009 12:47pm |
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| discocuzzy Member Since: 16 Jul 2008 Location: surrey Posts: 1200
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You cannot teach stupid people to do clever things |
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9th Dec 2009 3:03pm |
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| Sonic3d Member Since: 28 Jan 2008 Location: Ross on Wye Posts: 1505 
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I nearly fell off my seat with that comment willy
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9th Dec 2009 3:11pm |
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| Higgers Member Since: 08 Apr 2009 Location: Cheshire Posts: 671 
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Don't worry Pete,
I've just been staring at your Avatar and its just clicked.
I think i need to get my eyes tested.  |
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9th Dec 2009 6:08pm |
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