535d drivers
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Lag is not to be confused with the boost threshold; however, many publications still make this basic mistake. The boost threshold of a turbo system describes the minimum turbo RPM at which the turbo is physically able to supply the requested boost level. Newer turbocharger and engine developments have caused boost thresholds to steadily decline to where day-to-day use feels perfectly natural. Putting your foot down at 1200 engine RPM and having no boost until 2000 engine RPM is an example of boost threshold and not lag.
On modern diesel engines, this problem is virtually eliminated by utilising a variable geometry turbocharger.
The 535d uses sequential twin turbos. The small one is active the moment you switch on the engine.
ABC
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Originally Posted by dlevi67' post='391247' date='Feb 14 2007, 04:58 AM
No you are not. 
However, I think the only ones on this board that can comment on quality of diesel available in Romania are you and... mmm you. Or perhaps someone like 700700 if MOL is available in Bulgaria, as well as Romania and Hungary (or ATS77, if he goes back every now and then).
Wobbling or vibrations would tend to indicate that the car is running on 5 (or fewer) cylinders - so perhaps there is a fueling problem or an out-of-kilter injector. It should not happen - to the point of wobbling the car - simply because the engine is cold. A little rough idle and noise, yes. Wobbling or hunting (revs changing continuously) mean something's not quite right.
However, I think the only ones on this board that can comment on quality of diesel available in Romania are you and... mmm you. Or perhaps someone like 700700 if MOL is available in Bulgaria, as well as Romania and Hungary (or ATS77, if he goes back every now and then).
Wobbling or vibrations would tend to indicate that the car is running on 5 (or fewer) cylinders - so perhaps there is a fueling problem or an out-of-kilter injector. It should not happen - to the point of wobbling the car - simply because the engine is cold. A little rough idle and noise, yes. Wobbling or hunting (revs changing continuously) mean something's not quite right.
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My Ride: E61 535d Apr 05. UK spec + Media Pack, Luxury Pack & Visibility Pack
Originally Posted by BetterMakeWay' post='391365' date='Feb 14 2007, 07:50 AM
Thanx. So it's either an injection problem or a fuel problem right? Now if the car does it only when it's cold and only from time to time (not always)...hmmm
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My Ride: 535d Sport Tourer - E34 M5 Race Car
Originally Posted by BetterMakeWay' post='391365' date='Feb 14 2007, 07:50 AM
Thanx. So it's either an injection problem or a fuel problem right? Now if the car does it only when it's cold and only from time to time (not always)...hmmm
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Originally Posted by juliann' post='391388' date='Feb 14 2007, 09:19 AM
It's certainly not unheard of for underground tanks to be less than completely sealed.
Wouldn't it make sense for the outlet pipe from the underground tank to be at the opposite height to where water might form.
I assume water and diesel don't mix.
ABC
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Originally Posted by aybeesea' post='391392' date='Feb 14 2007, 01:56 PM
My physics needs updating.
Wouldn't it make sense for the outlet pipe from the underground tank to be at the opposite height to where water might form.
I assume water and diesel don't mix.
ABC
Wouldn't it make sense for the outlet pipe from the underground tank to be at the opposite height to where water might form.
I assume water and diesel don't mix.
ABC
Juliann by brimming the tank you mean, empty it and cleaning it?
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Originally Posted by BetterMakeWay' post='391396' date='Feb 14 2007, 10:31 AM
Juliann by brimming the tank you mean, empty it and cleaning it?
ABC
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Originally Posted by aybeesea' post='391392' date='Feb 14 2007, 09:56 AM
I assume water and diesel don't mix.
In fact such mixing is a potential problem which requires active management.
ABC
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Originally Posted by BetterMakeWay' post='391396' date='Feb 14 2007, 10:31 AM
But water and petrol does? This should be interesting.
Juliann by brimming the tank you mean, empty it and cleaning it?
Juliann by brimming the tank you mean, empty it and cleaning it?
I believe that in the UK there is a legal tollerence for water in fuel but I'm not sure what it is.
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Originally Posted by the-oneil' post='391139' date='Feb 13 2007, 08:54 PM
Ehmmm It is called Turbo Lag. A known issue with a turbo engined car and it is the delay between the instant a car's accelerator is depressed and the time the turbocharged engine develops a large fraction of the power available at that point in the engine's power curve (Spool up). This however is much less in the 535d as it uses a smaller turbo, but turbo lag will always be there.
Not on a 535d it's not, there is non !
There can be an issue with slow response driving off in D sometimes ( I think cos it tries to start in 2nd gear for smoothness)
I for one will slip it across to DS if I'm on a roundabout and need a quick getaway
PS not on a cold engine though !
