yegnold

If anyone has one, could they please put up the torque curve for a completely standard 1.9TDI PD 130 VRS engine?

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Ed

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oilburninnut

look at the two black ones that say standard on here,the top silver one isn't sandard it had a dragon box on it,these two are asz engined fabias,then compare them to my blue fabia with the standard blt engie in

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Gary
www.dogboxmedia.co.uk

yegnold

Thank you...

You don't happen to know the most economical rev range for the ASZ engine do you?

Common sense would tell me it's around or just before the peak torque value... but I'm not an engine expert by any means!

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Ed

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oilburninnut

i have no idea,i drive everything like i stole it

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Gary
www.dogboxmedia.co.uk

yegnold

I do occasionally (generally when some impatient git overtakes me in a 30 and angers me by doing so), but doing 36,000 miles a year, fuel costs are quite high. When not in a rush, it's nice to get 55+MPG, just to be a little kinder to the wallet

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Ed

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ScoobyChris

As always it depends on the type of road you're on, but a good guide is the instantaneous mpg on the trip computer which will let you experiment.

Chris

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Holding up the traffic in a little Italian..........

oilburninnut

lol,on track at silverstone in september i managed 19mpg's,and my trip computer is about 6mpg's optimistic

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Gary
www.dogboxmedia.co.uk

yegnold

Thanks Chris.

It tends to vary dramatically (although this is probably down to the gradient in the road), which was why I was trying to identify a reason by looking at the torque curves...

Sometimes it's best to be in 6th when doing 60mph, other times in 5th... I've also noticed that knocking 5mph off my speed and doing 55 instead increases fuel efficiency dramatically (isn't the most economical speed meant to be 56?)

The thing is, with the SDI engine in my previous Fabia it didn't really matter how I drove it (The worst MPG I ever got was 49, and that was absolutely thrashing the thing). It consistently did 56MPG (using the brim-to-brim method) regardless of how I drove it... unfortunately the same can not be said of the TDI engines..

I've also noticed that it's better to accelerate to 60 very quickly in third, and then cruise at the same speed for as long as possible, rather than accelerating there slowly (which would, my mind tells me, normally mean less fuel being burnt). Using the "accelerate quickly" method I average around 5MPG per-trip higher than if I accelerate steadily... Odd, isn't it?

For a track day that's quite good, isn't it?

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Ed

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ScoobyChris

My Fabia TDI was similar to your SDI and would return 50mpg no matter how I drove it, although others drove it and achieved 25mpg more but it did take us forever to get to our destination!

My own experience of the Mondeo is that getting up to speed briskly (rev to 4k rpm) seems to result in the best economy and even going past cruising speed and then letting the car "engine brake" down to cruising speed works well too. I've yet to determine if this is actually more economical or just a way of tricking the computer though I'm guessing that because you have your foot off/lightly on the throttle it is actually using very little fuel.

I'm also not convinced by the 56mph argument. I think it was just an arbitrary figure and will be down to the cars individual gearing, and whether they've tried to fix it so they have good mpg figures to quote

Chris

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Holding up the traffic in a little Italian..........

oilburninnut

well its better than my skyline ever managed on the road

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Gary
www.dogboxmedia.co.uk

yegnold

The main way in which I tend to keep MPG figures high is handling traffic lights in town. If they are on red (or just going to red) and I am 200-300 metres away, I don't continue at 30mph. I engine brake and try to make it so I don't have to stop for the lights at all. The time taken engine braking (and consequently using no fuel whatsoever) and not having to move off from 0mph at the lights save bucketloads of fuel if you manage to do it for 2 or more traffic light sequences.. you'd be surprised

Also overtaking... if you can overtake without having to slow down for the car in front (you know, the perfect kind of overtaking manoeuvre when you end up behind the car just as a long straight suitable for overtaking appears), you save loads of fuel..

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Ed

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Arragonis

Downhill on the overrun (not in neutral) - uses no fuel and keeps going...

ScoobyChris

But surely if you're on an economy run sitting in the car in front's slipstream is better than overtaking

Chris

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Holding up the traffic in a little Italian..........

devonutopia

I rarely overtake caring about economy. The only time "might" be if the person is doing 40mph, so I have to use 4th, whereas if I had clear road I would do 60mph in 6th - Which I think is more economical. I definitely screw economy when actually overtaking. From 40, a nice 3rd gear blat up to 70 does the trick, then straight into 6th and engine brake back to a reasonable speed.

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Offerman

I've personally found that when I am trying to drive economically it does wonders for me trying to hone my advanced driving as your constantly so much more aware of whats around you and whats going on up ahead and behind. The traffic light scenario you mentioned is a perfect example.

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