HDI Turbo Lag

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Thu 23 Jan 2003 18:49
HDI Turbo Lag - Ben79
Do HDI engines get turbo lag? Dads dealer says it doesnt exist on those engines.

Ben
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Thu 23 Jan 2003 19:25
HDI Turbo Lag - Baskerville
Mine doesn't, or at least it's not noticeable, a description that could also apply to the noise levels. I am extremely impressed. Just short of 600 miles on the first 60 litre tank, too. The petrol engine is dead. You heard it here first.

Chris
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Thu 23 Jan 2003 19:35
HDI Turbo Lag - Ben79
I second that about the petrol being dead, oh, except the 1.4 and the 1.6 16v to be used in the Citroen Pluriel, and my Xsara 1.4 until I sell it.

I have also driven a Xsara with the 110bhp engine, that was super quick with no noticeable turbo lag.

Ben
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Thu 23 Jan 2003 22:03
HDI Turbo Lag - Bromptonaut
xantia 110; no problem unless you let the revs go below 1800, keep telling SWMBO thats what the gearstick is for!!
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Thu 23 Jan 2003 22:27
HDI Turbo Lag - Ben79
I found the HDI 110 in the Xsara courtesy car went well from 1300 rpm, and would infact cruise at 1,000 rpm at 30.

Anyway, maybe a rev counter fitted to the Picasso would ease things. Citroen should have designed a digital one, see the Astra and Senator of the 80's.

Ben
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Thu 23 Jan 2003 22:43
HDI Turbo Lag - PhilW
On the old Turbo D Xantia the turbo kicking in at 1800 revs was very noticeable, especially when towing a caravan! Below 1800 it was like towing with my old non-turbo Bx and accelleration from below 1800 revs virtually impossible! On the Xantia 110 there is good accelleration even from very low revs and I can't say I even notice the turbo kicking in - it's as if it is on all the time. Very smooth pick-up even with the van behind and the accelleration can surprise many cars who assume they can overtake easily after roundabout etc. Several times I have had to ease off to let overtakers in to avoid their embarrassment!(Or worse!)
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Fri 24 Jan 2003 19:58
HDI Turbo Lag - volcane
I have a 110 HDI xsara which replaced a zx td. The xsara has a barely noticeable turbo lag but it is definetly there. I think citroen have tried too hard to make it feel like a petrol and have lost a lot of the pleasure.
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Sat 25 Jan 2003 11:09
HDI Turbo Lag - Mr Fox
This is a very impressive engine by any standards, I have done almost 90 000 miles in a 406 estate, and not had even the slightest bother, used no oil and routinely get 40-45mpg even when driven hard - ie 90 mph all day.

I thought I'd killed it recently when it started to rattle, it was the plastic cover on the engine which had come loose.

I'm looking forward to the new 407, its supposed to have a 136hp version of this engine. I've tried this in the Coupe, and its a real flyer.
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Sat 25 Jan 2003 12:09
HDI Turbo Lag - 547HEW
Hi Ben,

Speaking generically, IMHO turbo lag tends to be greater with:-

a) Larger dia turbos (more rotary inertia).
b) Longer ducting between compresssor outlet and inlet manifold.(More volume of pipework to "pump up").
c) Large turbo relative to engine swept volume. (Not enough "puff")
d) Low efficiency turbo, i.e. big clearance between compressor blades and casing. (Lower cost).

I dont think going to common rail influences turbo lag. It is undesirable as a driving characteristic, and is therefore minimised.

But if the 1.4 HDI layout is anything like the 1.4 Fiesta TDCI, then this has a very short (b), and favourable (c) and (d). So little discernable lag.

Happy motoring 547 HEW

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Sat 25 Jan 2003 13:18
HDI Turbo Lag - Armitage Shanks{P}
You might find the following site of interest in connection with turbo problems

www.vanaaken.co.uk
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Sat 25 Jan 2003 19:09
HDI Turbo Lag - Andrew-T
I seem to remember hearing several months ago that this 1.4 HDi engine was a joint venture between Ford and Peugeot, in which case they are the same thing. Sounds an unlikely pair of bedfellows though.
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Sat 25 Jan 2003 20:44
HDI Turbo Lag - Ben79
There are small differences between the Ford and the PSA 1.4 HDI.
www.psa-peugeot-citroen.com/en/psa_group/technolog...p
contains technical info about them.

Ben
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Sun 26 Jan 2003 00:47
HDI Turbo Lag - Shigg
I'm under the impression that certain engines use a variable geometry turbo to reduce lag whilst still being big enough to keep the engine fed at high revs? Is it VW that's using this technology on their diesels?

Steve.
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