GolfGTIforum.co.uk
Model specific boards => Golf mk6 => Topic started by: FroGTI on 23 September 2009, 10:00
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Since my remap at the weekend, I have been driving around pretty gingerly to avoid anything snapping :wink: I just went out on a nearby motorway and selected the instant fuel consumption setting on the MFD. At 70-80 mph, it was hovering around 35-40 mpg, but then I put my foot down as far as it would go... I got to about 115 mph (for a few seconds only and the road was deserted). OK, the pick-up was very good, but during the acceleration consumption went up to 5 (yes, FIVE!) mpg (50 litres/100km) and refused to go any further.
I think I maxxed out the computer. Does this happen on the stock car (I should have tried before I got mine done, but I didn't). 5 mpg is terrible :sad:
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I think you'll find almost any car under hard acceleration will dip its mpg below 10, even 1.0l Polo
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obviously accelerating hard is bad for fuel consumption. :laugh:
I've never known anyone drive gingerly just because of a remap.
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I think you'll find almost any car under hard acceleration will dip its mpg below 10, even 1.0l Polo
Yep, what he said ^
I try and avoid looking at MPG these days and just enjoy the car (I always fail, I always have to have a quick look at the end of the journey, its really anoying me now lol, just want to not be able to care lol)
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Instant mpg readings are fairly meaningless. They are only really useful when you are cruising under constant throttle. As the computer is probably just looking at intake manifold pressure, all it really tells you is how wide open you've got the throttle and how much load the engine is under. With the accelerator nailed and the load of pushing a car through the air at 100+ I'm not surprised you only get 5mpg - at that instant and under that set of conditions.
Average mpg read after covering a reasonable distance gives you a more meaningful (if slightly optimistic) value.
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OK, thanks for your reassuring answers :smiley:
I try and avoid looking at MPG these days and just enjoy the car (I always fail, I always have to have a quick look at the end of the journey, its really anoying me now lol, just want to not be able to care lol)
Lol, I do the same. I try to keep it on Speed or Oil Temp, but I can't resist having a look at the Avg Fuel Cons from time to time. It's a double whammy, because not only am I annoyed when I see 26mpg, but I'm also annoyed with myself for looking and worrying about it :grin:
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I set the display on average fuel consumption last night, just as an experiment. The figure when I reached work was a round 40mpg. I have to point out that I have a straight 10-mile cruise up an A road with no lights, roundabouts or anything, and because of other traffic I was doing 60mph for much of it.
I'm actually not getting as good fuel consumption as I was anticipating, overall, as yet. Though it's hard to say as I haven't used a tankful yet. Did I hear someone say that fuel consumption improves once you hit 1,000 miles on the clock?
Rolfe.
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I find any sustained driving at 55-60 returns excellent mpg. My 8v managed 50+mpg on a long stretch of 50mph through roadworks on the M1 once, was really surprised. Once you hit 70mph things start going titz up but then you get there quicker and its more fun.
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Did I hear someone say that fuel consumption improves once you hit 1,000 miles on the clock?
All your mechanical bits should be bedding in nicely by about 1000-1500 miles plus I guess the engine management and gearbox computers will have adjusted to your driving style (and you to the car) so I'd imagine a small increase.
Out of interest, did everyone check their tyre pressures on receiveing the car? It's surprisingly common for new cars to hit the road with them under/over inflated.
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and because of other traffic I was doing 60mph for much of it.
Rolfe.
you do realise you're driving a GTI and not a peugeot anymore?!? 60?! :laugh:
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Which part of BECAUSE OF OTHER TRAFFIC don't you understand?
The Peugeot could go up that road so fast it changed colour, but not at quarter to nine in the morning.
Rolfe.
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Which part of BECAUSE OF OTHER TRAFFIC don't you understand?
Rolfe.
all of it! :laugh: they shouldn't be in your way so make them move over/overtake them!! :evil:
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On a single-carriageway road with traffic coming the other way?
Thanks, but I prefer to go on breathing.
(That road has quite a high incidence of accidents, some very nasty, as a result of incautious overtaking. Not much point having a new car if you write it off - and yourself while you're at it.)
Rolfe.
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boring! :laugh:
i'm only messing with you :grin:
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boring! :laugh:
i'm only messing with you :grin:
Yeah, I know! :cool:
Rolfe.
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I'm actually not getting as good fuel consumption as I was anticipating, overall, as yet.
I have to admit that I'm not, either. I was reading a test of the GTI this morning on an online Swiss motoring magazine and the guy was saying that the on-board computer is very optimistic. During his test it reported an average of 9 litres/100km (31 mpg), but he measured actual consumption as closer to 13 (21 mpg). I have done nearly 2000 miles now, but have to make quite an effort to keep the average figure down to around 8 l/100km (35 mpg).
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FroG i think you may need to edit your signature - otherwise it looks like revo have fooked your car up and taken 45bhp off your car :grin: :grin:
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FroG i think you may need to edit your signature - otherwise it looks like revo have fooked your car up and taken 45bhp off your car :grin: :grin:
Ooops, thanks for the heads-up :embarassed:
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Since my remap at the weekend, I have been driving around pretty gingerly to avoid anything snapping :wink: I just went out on a nearby motorway and selected the instant fuel consumption setting on the MFD. At 70-80 mph, it was hovering around 35-40 mpg, but then I put my foot down as far as it would go... I got to about 115 mph (for a few seconds only and the road was deserted). OK, the pick-up was very good, but during the acceleration consumption went up to 5 (yes, FIVE!) mpg (50 litres/100km) and refused to go any further.
I think I maxxed out the computer. Does this happen on the stock car (I should have tried before I got mine done, but I didn't). 5 mpg is terrible :sad:
why would you not have tested out this before and after the remap? would have saved you from looking like such an idiot.
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Shrocco. We're all refreshed and challenged by your unique point of view.
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Instant mpg readings are fairly meaningless. They are only really useful when you are cruising under constant throttle. As the computer is probably just looking at intake manifold pressure, all it really tells you is how wide open you've got the throttle and how much load the engine is under. With the accelerator nailed and the load of pushing a car through the air at 100+ I'm not surprised you only get 5mpg - at that instant and under that set of conditions.
Average mpg read after covering a reasonable distance gives you a more meaningful (if slightly optimistic) value.
The computer knows exactly how much fuel is squirted into the engine. It controls the squirters. Even things like battery voltage are taken in to account to achieve precise control of the fuel use. The readout is spot-on.
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Im tight i watch constently how much fuel im burning. Seems like after a quick blast u can c the needle visably drop.
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OK, in the name of science (and fairness) I did an economy run this afternoon of about 20 miles and managed 43mpg. No breaking the speed limit and only one quick burst of speed to overtake a couple of other road users.
I guess I'm just not used to petrol cars yet: my (remapped) 330d also got 43mpg when I drove carefully and about 35 when I wanted a bit of fun. The GTI seems to go from 43 down to about 18 :sad:
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OK, in the name of science (and fairness) I did an economy run this afternoon of about 20 miles and managed 43mpg. No breaking the speed limit and only one quick burst of speed to overtake a couple of other road users.
I guess I'm just not used to petrol cars yet: my (remapped) 330d also got 43mpg when I drove carefully and about 35 when I wanted a bit of fun. The GTI seems to go from 43 down to about 18 :sad:
that sounds about right you know - i've been getting 36 odd when driving normally (so you're 43 sounds right given the revo spiel of higher economy) yet when i've put my foot down and had some fun the average goes down to 22 (again, in line with your 18 - as i'm assuming you're using more petrol).
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The computer knows exactly how much fuel is squirted into the engine. It controls the squirters. Even things like battery voltage are taken in to account to achieve precise control of the fuel use. The readout is spot-on.
On what information are you basing that explanation? The ECU computer specifies how long to open the injectors based on its fuel map, but the little screen you are looking at on your dashboard is a separate computer. To my knowledge the ECU does not record the volume of fuel which has passed through the injectors, so can not provide that data to the multi-function display.
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OK, in the name of science (and fairness) I did an economy run this afternoon of about 20 miles and managed 43mpg. No breaking the speed limit and only one quick burst of speed to overtake a couple of other road users.
I guess I'm just not used to petrol cars yet: my (remapped) 330d also got 43mpg when I drove carefully and about 35 when I wanted a bit of fun. The GTI seems to go from 43 down to about 18 :sad:
that sounds about right you know - i've been getting 36 odd when driving normally (so you're 43 sounds right given the revo spiel of higher economy) yet when i've put my foot down and had some fun the average goes down to 22 (again, in line with your 18 - as i'm assuming you're using more petrol).
Yep I would agree with that. Tootling along I can get upwards of 40mpg quite easily on a longish journey (99 Ron of course). However giving it a good blast will easily get it down to below 20mpg on a short run. So very good when you want them to be... not so good when your pressing along. I can live with that :grin:
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The computer knows exactly how much fuel is squirted into the engine. It controls the squirters. Even things like battery voltage are taken in to account to achieve precise control of the fuel use. The readout is spot-on.
On what information are you basing that explanation? The ECU computer specifies how long to open the injectors based on its fuel map, but the little screen you are looking at on your dashboard is a separate computer. To my knowledge the ECU does not record the volume of fuel which has passed through the injectors, so can not provide that data to the multi-function display.
It does.