ECU Upgrade Appreciation or Problems

[blutopless2]

Not saying you're wrong but will have to ask him. May help writing down the km and litres/distance as well as i'm not sure if its exactly the same as the MFD reading.

i worked out my fuel consumption using the calculation method several times doing different styles of driving etc both before and after the chipping... All of the times i have done it it returns the same values as my MFD. I know that people have varying degrees of success with the MFD values but mine seems to be spot on.

On a trip to Queensland in March this year we travelled around 4500km's. The average fuel usage was around 7.8L/100k's. The best i got was on purely freeway driving of course at 110kmh, returned 7.5L/100k's which really surprised me considering we had 3 adults, toddler and a boot chockablock full of luggage.

[jimbomort]

I doubt a retune is more economical (certainly isn't when you put your foot down). It would come down to your driving style. I don't see how it can make more power using less fuel, unless more air generates it.

Speak to Guy at APR or see details in Tuning thread on Tiguan forum, but it is possible and, as I understand it, primarily for the following reason - if the mapping is done for a specific RON (like 9 then the engine will run on that more efficiently than on the factory setting that takes a wider range of RONs into account and therefore cant run as efficiently on a specific RON. The other possibility (and I am posturing more here) is as some have already suggested related to the change in the torque curve. Engines are more fuel efficient under high load (ie more load at lower revs - to a point) as friction etc losses effect efficiency as revs climb.

Of course if you use the extra power , especially on boost/at higher revs then yes, you dont get to use that extra power from the same engine without using more fuel. Not quite the holy grail of more power and better fuel economy all round, but damn close - more power when you want it and better fuel economy when you dont.

[jimbomort]

On a trip to Queensland in March this year we travelled around 4500km's. The average fuel usage was around 7.8L/100k's. The best i got was on purely freeway driving of course at 110kmh, returned 7.5L/100k's which really surprised me considering we had 3 adults, toddler and a boot chockablock full of luggage.

For all its worth I have got 6.9l/100klm on longer trips with a roof box on and the car loaded to the hilt out of our Tiguan 125 2.0TSI. Have also got down to mid 6's on a number of occassions. True this has been driving with a focus on economy, but given the Tig is both heavier and higher than the Jetta, I'd be surprised if you cant get down to the mid 6's with the Jetta. If you are interested in getting more economy out of your car on cruiser trips - check out Greenfleet - they have some good tips on driving economically. Either way sure the chipped Jetta is lots of fun.

[G-rig]

Speak to Guy at APR or see details in Tuning thread on Tiguan forum, but it is possible and, as I understand it, primarily for the following reason - if the mapping is done for a specific RON (like 9 then the engine will run on that more efficiently than on the factory setting that takes a wider range of RONs into account and therefore cant run as efficiently on a specific RON. The other possibility (and I am posturing more here) is as some have already suggested related to the change in the torque curve. Engines are more fuel efficient under high load (ie more load at lower revs - to a point) as friction etc losses effect efficiency as revs climb.

Makes sense, as long as you drive it the same as before which most people don't having the extra power (and boost). I have the APR R32 N/A tune and don't think it uses any more fuel as I know these euro cars are detuned to opperate in a host of operating conditions.

[parso_rex]

If the remap modifys ignition timing (assuming it was not optimised) and/or leans out the fuel mixtures then you would use less fuel for the same power/torque output. Its pretty common to lean out the mixtures as most manufacturers supply them notoriously rich exfactory. The reason they do this is mainly as a bonus safeguard as the charge temp is reduced with damage to the internals being less likely should you be experiencing a problem. The rich mixture doesn't hurt power too much either - a little but not something worth deliberately chasing unless your after every last kW. It doesn't do wonders for spark plugs or oil though

M

[silberpfeil]

2.0 TDI chip tuning

Hi everyone, I will be getting a Golf V 2.0 TDI 103 kW shortly, and I intend to do some chip tuning.

Has anyone got experience with products/services from
- DP Chip (Berrima Diesel)?
- Oettinger?
- Evolve Technik?

I believe there is a fundamental difference between concepts, in that some provide a box (like DP Chip) and others that reprogram the ECU.

Any help/hints is much appreciated.

Urs

[Brendan_A]

I've had my TDi Jetta oettinger flashed for the last month now and done about 2500kms. I've got nothing but praise for the chip! Still returns good fuel economy. We drove to Ipswich and then up Mt Glorious for a spin the other day and I still got an average of 5.7L/100, that was a 280km round trip. The torque is just awesome now! It doesn't change cogs as much now as it has that extra torque and makes the engine work. Even my missus loves having it chipped as she drives it 85% of the time. She use to hate the lag on take off with the DSG, but since having it chipped has improved it by heaps! She is not so scared at roundabouts in peak hr. I highly recommend one. I know the oettinger is expensive for the initial outlay but they have a good name and you can buy it with warranty. It sure puts a smile on my face when the turbo kicks in!!

[silberpfeil]

oettinger chip tuning

many thanks for the feedback on Oettinger - much appreciated

[marinemw]

I installed the Viezu V-Switch (formally Chipped UK ST3), the service was great and painless, and with the UK pound low against the A$ was very economical, abt $700.
I can reprogram the ECU back to original or select the Econ-tune or the Fastroad tune, the car is very responsive and great on fuel.

Got all the mods done (for now), the Viezu(ST3) fast road tune and exhaust is great (looks cool too)