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Guys, we have this debate non-stop, it has locked down three or four threads. I want to hear the reasoning, but I don't want to see things get personal.
I've been watching this thread...and I understand were DJ is coming from. Its not like a butt dyno when it comes to modding a TDI and seeing a marked improvement on MPG's...even with the EGR delete I saw at least 200km more on my trip to MB and back...and I've done this trip several times...vnt 17/22 and intercooler, Malone tune
2 different cars, one is a Golf, one is a Jetta, pretty near the same. Both are 4 door and have power windows and doors with A/C.
2 different drivers, I guess that was my own error. I have driven the Golf myself and barely got over 1000 km's driving it the same as I would the Jetta on a highway trip.
Weight difference, Jetta's curb weight is 2736lbs, the Golf is 2588lbs so the Golf is lighter.....
Drag difference, both cars had wind coming from the south hitting the passenger side of the car while driving.
Transmission, they are both 5 speed and in cruise.
Both engines have had all their fluids flushed in the last 15,000 kms.
Carbon buildup, where? I have race-pipes for both and my intakes are clean.
Turbo performance, well the Jetta has a big turbo, the Golf has a stock. Bigger turbo usually = less fuel economy.
Both air filters were replaced in the last 15,000 kms of driving.
Tire pressures are at 30-35 for all 4 tires on each car.
The Jetta is running 17's at 17x45x225 and the Golf is running 15x55x200.
The Jetta is running Race 520 5 hole nozzels in the injectors, the Golf is running stock injectors.
The Jetta is running an 11mm fuel pump from an automatic, the Golf is running a stock 10mm fuel pump.
Both cars are filled up at the same Husky station once a month or so.
Both cars are running slightly advanced timing, but only visible on VCDS.
Both cars have A/C.
The Jetta has just over 300,000 kms. The Golf just rolled over 550,000kms.
Both cars are running just over 19 for compression.
You see, a lot of the specs are the same. The ones that are not the same, really don't help the fuel economy side of things on their own. For example, the fuel pump is 10% bigger on the Jetta, aka there is 10% more fuel going into the Jetta than the Golf. The turbo is much bigger, requiring more air and fuel to boost in than the stock one on the Golf. I understand both cars have different mileage, and tires but is that really enough reason for why one car gets over 200 km's more per tank than the other on highway? You see, that's where I think the chip comes in and makes the difference.
r u sure a bigger turbo means worse economy? so you are saying putting on a smaller turbo in the golf would increase your wife's mpg?
i forgot to add vent trick to the list
anyway looking up official mpg for the alh golf tdi its 4.4l/km highway, 55L tank, if you work it out thats 1250km highway rated manufacturer... so if you can barely get 1k something from my list is not working properly in your car
r u sure a bigger turbo means worse economy? so you are saying putting on a smaller turbo in the golf would increase your wife's mpg?
i forgot to add vent trick to the list
anyway looking up official mpg for the alh golf tdi its 4.4l/km highway, 55L tank, if you work it out thats 1250km highway rated manufacturer... so if you can barely get 1k something from my list is not working properly in your car
You're right, it doesn't necessarily mean that you will get worse economy with a bigger turbo. Although if you ran the stock tune or a really bad tune it could be.
The vent trick is awesome and yes I use it every fillup.
I have yet to meet someone with a stock ALH TDI get over 1200 kms on the highway. Although most people that are chipped can clear 1100, 1200, 1250? I understand your reasoning and the specs do make mathematical sense, but I have just never seen it happen. What is the best mileage you have gotten out of your Golf Bart with your setup?
2001 Jetta TDI GL Silver
Malone Tune stage 5+ ,VNT17-22Turbo, OMI, PP Race Pipe, PD 150 Intake, 2 1/2" Straight back exhaust, no mufflers, 2 1/2" downpipe straight no Cat, Race 520 Injectors, 11mm Fuel Pump, Lift Pump, EGR Delete mod,DC Stage IV Clutch, Michelin X-Ice 2's, 26 lb/s of boost alll day long, Smoking like a train!
im with dj on this one when I put my 11mm pump and stage 3 tune in my car my in city economy went up 100-150km a tank I drive the same road at the same time every day in the same rush hour traffic I fill at the same gas station almost every tank and run the same fuel conditioner every tank the car now makes way more low end power so I don't have to down shift as often and don't have it to the rug as much to accelerate at the same rate of speed at I did when it was stock my car is a 2002 golf with an alh and just so this has some info for the original poster I went with td tuning and there flash tool I have a bit of a strange combination big pump with small nozzles and mike from td did 4 tunes for me before we were done he was not happy till I was and I would email him my file and he had a new tune to try in 20-30 min sometimes longest I waited was half a day his service was awesome
Mike from TD Tuning is amazing. I have never ran one of his tunes, but I know of a lot of people that have and all of them give him praise for his tunes. Only reason I was recommending Malone tuning over TD tuning was to help out our economy in Canada and to possibly save on shipping costs because shipping through Canada is usually cheaper than the States. Both tunes are amazing and I'm sure both Mike and Mark would give you equal service.
2001 Jetta TDI GL Silver
Malone Tune stage 5+ ,VNT17-22Turbo, OMI, PP Race Pipe, PD 150 Intake, 2 1/2" Straight back exhaust, no mufflers, 2 1/2" downpipe straight no Cat, Race 520 Injectors, 11mm Fuel Pump, Lift Pump, EGR Delete mod,DC Stage IV Clutch, Michelin X-Ice 2's, 26 lb/s of boost alll day long, Smoking like a train!
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