K04 economy vs K03 turbo

[Obese]

It baffles me why people want better fuel economy from a k04, it aint gonna happen. As said above, you would save more money not having it done, and yes it can be mapped as you put in your post as mine is very similar.

Revo stage 3 KO4 converted car vs Revo stage 2+ KO3 is actually 2 or 3 mpg more economical

Yep i can vouch for that, i saw 38mpg the other day

[GrayMK5GTI]

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If someone is considering a K04 vs K03 car regarding fuel economy, I think it may be more appropriate to buy a completely different kind of car and one which delivers serious fuel economy. GTI's/Ed30's etc are designed to be enjoyed without too much concern about the mpg.

I beg to differ on this one Robin  

The FSI technology (direct injection etc) has been designed in to aid fuel economy and reduce emissions (among other reasons)  

If you think back to the original MK1 GTI, people loved it for its "reasonable fuel economy" which is why it was such a hit - performance AND economy  

Upon talking to R-Tech Nick, he explained (in more detail than I can understand  ) that the TFSI basically runs super lean on light throttle (creating loads of NOX for the CAT to remove) for long periods. . . All in the name of fuel economy which is why quite a few of us have managed 40+mpg on those boring motorway runs

Graeme

[RedRobin]

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If someone is considering a K04 vs K03 car regarding fuel economy, I think it may be more appropriate to buy a completely different kind of car and one which delivers serious fuel economy. GTI's/Ed30's etc are designed to be enjoyed without too much concern about the mpg.

I beg to differ on this one Robin 

The FSI technology (direct injection etc) has been designed in to aid fuel economy and reduce emissions (among other reasons) 

If you think back to the original MK1 GTI, people loved it for its "reasonable fuel economy" which is why it was such a hit - performance AND economy 

Upon talking to R-Tech Nick, he explained (in more detail than I can understand  ) that the TFSI basically runs super lean on light throttle (creating loads of NOX for the CAT to remove) for long periods. . . All in the name of fuel economy which is why quite a few of us have managed 40+mpg on those boring motorway runs

Graeme

....I'm not sure I understand what you mean. Given the performance which a Mk5 GTI delivers I think that the mpg is quite good. In 7 years I have never ever seen a figure higher than ~34 mpg on my display. If the first number is a '3' the journey has usually been pretty dull and due to traffic or conditions. The lowest I have seen is 11 mpg (on a one day driving course). I usually see ~26-28 mpg.

[bacillus]

Upon talking to R-Tech Nick, he explained (in more detail than I can understand  ) that the TFSI basically runs super lean on light throttle (creating loads of NOX for the CAT to remove) for long periods. . .

I sometimes see this on my polar that shows my lambda at these times as 1 which is very lean.

[gobbleplease]

id probably say the k03 is better of by about 3 mpg with a mix of driving

[gazon69]

Even if the k04 does give 1-2mpg that equates to a maximum of an extra 24 miles from a full tank, and lets face it, you would have to have driven like morgan freeman from the miss daisy film to get it for the whole of the fuel in the tank, which goes back to the question of why buy a gti and mod it, may as well just buy a soot chucker. For me its 'miles for smiles' 

[RedRobin]

Even if the k04 does give 1-2mpg that equates to a maximum of an extra 24 miles from a full tank, and lets face it, you would have to have driven like morgan freeman from the miss daisy film to get it for the whole of the fuel in the tank, which goes back to the question of why buy a gti and mod it, may as well just buy a soot chucker. For me its 'miles for smiles' 

....Absoluoootely!! The GTI tradition is that it's an allround 'sports' car. It's like having an Arab Thoroughbred in the stable and only walking her and never galloping - She won't be a happy bunny (or horse!) and you'll get behavioural problems. That 2.0T FSI engine needs exercise!!

[GrayMK5GTI]

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If someone is considering a K04 vs K03 car regarding fuel economy, I think it may be more appropriate to buy a completely different kind of car and one which delivers serious fuel economy. GTI's/Ed30's etc are designed to be enjoyed without too much concern about the mpg.

I beg to differ on this one Robin 

The FSI technology (direct injection etc) has been designed in to aid fuel economy and reduce emissions (among other reasons) 

If you think back to the original MK1 GTI, people loved it for its "reasonable fuel economy" which is why it was such a hit - performance AND economy 

Upon talking to R-Tech Nick, he explained (in more detail than I can understand  ) that the TFSI basically runs super lean on light throttle (creating loads of NOX for the CAT to remove) for long periods. . . All in the name of fuel economy which is why quite a few of us have managed 40+mpg on those boring motorway runs

Graeme

....I'm not sure I understand what you mean. Given the performance which a Mk5 GTI delivers I think that the mpg is quite good. In 7 years I have never ever seen a figure higher than ~34 mpg on my display. If the first number is a '3' the journey has usually been pretty dull and due to traffic or conditions. The lowest I have seen is 11 mpg (on a one day driving course). I usually see ~26-28 mpg.

Your comment "GTI's/Ed30's etc are designed to be enjoyed without too much concern about the mpg", i was challenging this as looking at the "Fuel efficiency related technology" the GTI has been designed with, i'd say they are designed to give good fuel economy.

Does that help? 

[RedRobin]

Your comment "GTI's/Ed30's etc are designed to be enjoyed without too much concern about the mpg", i was challenging this as looking at the "Fuel efficiency related technology" the GTI has been designed with, i'd say they are designed to give good fuel economy.

Does that help? 

....Ah yes  . I can now see how my words were ambiguous. I agree, as is the case with most modern car manufacturers, good fuel economy is a major selling point and so the engine designers pander to that. What I meant was that when buying a sporty performance car like the GTI/Ed30, actual mpg statistics should not be a major concern and certainly not the GTI vs Ed30 insignificant difference in mpg.

More power = More petrol. If someone wants a low mpg daily car, then perhaps the GTI/Ed30 isn't the car to buy. But for its power, the GTI/Ed30 is quite economical.

[gazon69]

Your comment "GTI's/Ed30's etc are designed to be enjoyed without too much concern about the mpg", i was challenging this as looking at the "Fuel efficiency related technology" the GTI has been designed with, i'd say they are designed to give good fuel economy.

Does that help? 

....Ah yes  . I can now see how my words were ambiguous. I agree, as is the case with most modern car manufacturers, good fuel economy is a major selling point and so the engine designers pander to that. What I meant was that when buying a sporty performance car like the GTI/Ed30, actual mpg statistics should not be a major concern and certainly not the GTI vs Ed30 insignificant difference in mpg.

More power = More petrol. If someone wants a low mpg daily car, then perhaps the GTI/Ed30 isn't the car to buy. But for its power, the GTI/Ed30 is quite economical.

Well put sir. 

[JMP]

Well I have seen 38-40mpg with k04 on the motorway with cruise control on sitting strictly at 70mph which was before the map for the k04, now post map its around 30-35mpg same speed.
My question was if it is able to make the turbo come in slightler higher up the rev range to enable even better economy as I do loads of miles and no I really don't want another car the gti is the car for me to provide performance and give back decent returns on fuel economy which is what it is doing but trying to improve it further

If you were running around with k04 and s3 injectors and k03 map, would mean your injectors are injecting more fuel then ECU thinks they are. This will mess the mpg figure on the dash to show too positive figures.

[bacillus]

If you were running around with k04 and s3 injectors and k03 map, would mean your injectors are injecting more fuel then ECU thinks they are.

Worse yet is that you will over boost with a k03 map and more than likely damage your engine like what Sammy did.   

[vag12]

Well I have seen 38-40mpg with k04 on the motorway with cruise control on sitting strictly at 70mph which was before the map for the k04, now post map its around 30-35mpg same speed.
My question was if it is able to make the turbo come in slightler higher up the rev range to enable even better economy as I do loads of miles and no I really don't want another car the gti is the car for me to provide performance and give back decent returns on fuel economy which is what it is doing but trying to improve it further

If you were running around with k04 and s3 injectors and k03 map, would mean your injectors are injecting more fuel then ECU thinks they are. This will mess the mpg figure on the dash to show too positive figures.

Ohh so now that makes sense, I was wondering how imanaged to get trip computer read out to 400 miles for the tank on the motorway and was worried in the sudden drop post map, so now thats explained I no need to worry anymore!