I have a Racechip fitted to my Greenline off of a Bluemotion Golf, easy to fit the 2 cables (1, on the fuel rail, 2, on the intercooler pressure sensor).

That's interesting to know. I was set on the Racechip as I done a fair amount of searching and red some good reports.

Then I discovered DTUK. These guys seem to give more detail of how their system works and actually I found it stated somewhere they modify and control both Fuel and Boost by intercepting injector cable and boost sensor.

I emailed Racechip to ask if they modify and control boost but their reply was obviously aimed at a very non technical person. They said something like they increase boost but didn't say how. I know that just adding fuel will increase boost but I was unsure that they intercepted the boost sensor.

My Yeti still doesn't arrive until Jan/Feb next year so I've got some time yet. I'm going with DTUK at this stage.

Happy Days.

I emailed Racechip to ask if they modify and control boost but their reply was obviously aimed at a very non technical person. They said something like they increase boost but didn't say how. I know that just adding fuel will increase boost but I was unsure that they intercepted the boost sensor.

My Racechip only connects to the fuel rail. Their video of the installation process on a 2.0 TDi Tiguan shows it very clearly (try not to be put off by the hint of the competent young lady demonstrator's other, er, assets at ~20s in...)

My Racechip only connects to the fuel rail. Their video of the installation process on a 2.0 TDi Tiguan shows it very clearly (try not to be put off by the hint of the competent young lady demonstrator's other, er, assets at ~20s in...)

Is yours the RaceChip CR Ultimate? From the pictures online to appears the same unit as the DTUK except for labeling and I guess programming.

Is yours the RaceChip CR Ultimate?

No, mine's the bog standard one. The cost was just low enough to buy one to have a play around with, and put away to gather dust on a shelf if it turned out to be snake oil. The CR Ultimate is way too expensive to take that kind of punt on (and anyway wasn't available when I bought mine).

From the pictures online to appears the same unit as the DTUK except for labeling and I guess programming.

My guess is that these things are all made in the same factory in China and badged up for the different distributors. It wouldn't surprise me in the slightest if a technical examination of the innards revealed zero differences between devices which were externally identical (bar colour, labelling etc).

Decided to go ahead and fit one from DTUK in the north east.

I called in and had a chat with the guys there about what I wanted it to do, very helpful and knowledgeable and explained in detail about adjusting the unit to suit my requirements. It comes with four pre programmed maps, each map can be finely adjusted as well.

I've just fitted the unit, a doddle apart from getting the boost pressure plug off, this entails taking off the undertray (dead easy) but I managed to break the plug casing getting it off the sensor.

Anyway, all fitted now and very impressed with an initial 10 mile run.

The engine revs very freely and in 1st and 2nd gears it takes off like a rocket. Torque is a lot better which is what I really wanted, in top gear on my test hill I was coming out at the top around 10mph faster than before without any effort.

I think overtaking will be possible in a gear higher than standard.

Remains to be seen what the fuel consumption is like but I can only see it being better with the improved efficiency provided I don't use the extra power all the time.

Decided to go ahead and fit one from DTUK in the north east.

I called in and had a chat with the guys there about what I wanted it to do, very helpful and knowledgeable and explained in detail about adjusting the unit to suit my requirements. It comes with four pre programmed maps, each map can be finely adjusted as well.

I've just fitted the unit, a doddle apart from getting the boost pressure plug off, this entails taking off the undertray (dead easy) but I managed to break the plug casing getting it off the sensor.

Anyway, all fitted now and very impressed with an initial 10 mile run.

The engine revs very freely and in 1st and 2nd gears it takes off like a rocket. Torque is a lot better which is what I really wanted, in top gear on my test hill I was coming out at the top around 10mph faster than before without any effort.

I think overtaking will be possible in a gear higher than standard.

Remains to be seen what the fuel consumption is like but I can only see it being better with the improved efficiency provided I don't use the extra power all the time.

I tried the DTUK box on my 170CR, overall I was quite impressed with it.

Certainly noticed an extra slug of torque in the mid range that made it feel fast, as it comes in quite sharply. A little bit like the mkI Fabia VRS.

I also didn't see any difference to fuel economy, if they do save a little fuel that's soon used with a bit more zip.

After running for a few months I tried a Jabbasport remap to compare.

It's a bit quicker, but doesn't feel as quick as the torque is smoother which I prefer for towing.

If I didn't want to remap I'd have been happy to stay with the DTUK box.

But it's certainly worth going for the ones that plug into the vehicle system in two places IMO over the old type.

Proper tuning boxes have their place in the tuning market, especially where ecus are locked (as for the Yeti) and the owner doesn't want the ecu taken out and opened to enable remapping.

The issue for mpg readings are that the ecu instructs how much fuel to inject on the Duty Cycle, where a tuning box is installed, the amount of fuel to be injected is overridden by the box, hence the fuel computer has no idea exactly how much fuel has been used.

I sell Steinbauer boxes, but mainly for agricultural vehicles and trucks, although they do make boxes for cars. They all have TUV certification, but end up being more expensive than a remap. Hence I don't tend to sell them for cars.

Tuning diesels is simple, you simply add fuel, how and where you add it makes the difference between good remaps/tuning boxes and the rest.

A good tuning box is way better than a mediocre remap ( e.g. Where a remap simply adds 10% across the range).

Tuning diesels is simple, you simply add fuel, how and where you add it makes the difference between good remaps/tuning boxes and the rest.

If that was true, the single plug boxes that add more fuel would be fine.

But the ones that alter boost too are better.

You increase boost by adding fuel.

You missed the point about adding fuel, how you add it across the map is key, just increasing fuelling across the range isn't the answer.

The other big factor is EGT, this can cause the ecu to pull back if temperatures get too high. DPFs also create a range of challenges to the tuner.

I have a racechip on my 2.0 SE+. I transferred it from my previous 2.0 Elegance.

I believe it has improved MPG. I am convinced the engine is smoother.

John

No you don't increase boost by adding fuel. That's the hack way to do it.

VNT turbos and the target boost is controlled across the rev/load range by the ECU. Plug in boxes can't alter this without acting as a complete piggy back computer.

Proper tuning boxes have their place in the tuning market, especially where ecus are locked (as for the Yeti) and the owner doesn't want the ecu taken out and opened to enable remapping.

Is the Yeti ECU still locked and untunable? I have been advised by Viezu that they can tune it without removing the ECU.

Happy Days.

I had to remove and open the ecu in order to remap it. As far as I know all Yeti ecus are locked, but if Viezu can flash it without opening the ecu, that would be most interesting. I'll have a search.

I thought they still had to be opened.

I've contacted Viezu in the UK asking if they can remap without opening the ecu, I'll let you know their response when it comes in.

Its beyond me why anyone would like to mess around with a perfectly tuned machine that does its job perfectly well.

Its beyond me why anyone would like to mess around with a perfectly tuned machine that does its job perfectly well.

Becasue we cant buy the 125kw (170bhp) Yeti in Australia.

Happy Days.

Its beyond me why anyone would like to mess around with a perfectly tuned machine that does its job perfectly well.

Because it is neither perfectly tuned, nor perfect. A very good match for most customers' demands, yes, but lets not get carried away with affection and obsession.

When a car is designed and tuned there are a number of compromises that have to be made. These compromises mean that the car will meet a certain middle-ground in terms of performance, economy and so on and will meet legal requirements and be an affordable price, but given that we, as people, are a wonderfully diverse community, even those of us who choose the same car will have different wants and needs which may stray from the compromised middle ground that it was built to satisfy. Aftermarket tuning is a way to personalise or otherwise change a car to meet an individual's specific demands. I am happy with what I got for the money I paid, but I recognise that others, for whatever reasons, may want to explore the fringes. It's not my cup of tea (any more - I have modified cars in the past) but good luck to those who want to do it.

Edited 30 December, 201213 yr by weasley

Its beyond me why anyone would like to mess around with a perfectly tuned machine that does its job perfectly well.

Because a 200-210bhp 4x4 diesel Yeti with an extra slug of torque is even more perfectly tuned and fun to drive than a stock 170.

Fortunately, we are not all the same.

Because a 200-210bhp 4x4 diesel Yeti with an extra slug of torque is even more perfectly tuned and fun to drive than a stock 170.

Fortunately, we are not all the same.

Vive la difference!

+1

Its beyond me why anyone would like to mess around with a perfectly tuned machine that does its job perfectly well.

Because Skoda in their infinite wisdom does not use the higher powered diesel (or petrol in the UK) engines with the DSG gearbox.

We are limited to one engine and gearbox combination, whereas VW & Audi offer more powerful engines with the DSG gearbox (and also fit the newer 7 speed DSG with a higher torque limit than the one fitted to the 1.2tsi.

I wanted a CR170 with DSG......... I now have that courtesy of Shark Performance.

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I've contacted Viezu in the UK asking if they can remap without opening the ecu, I'll let you know their response when it comes in.

Viezu have come back on the ecu issue, and its as I said, they have to remove and open the ecu to remap it.

Joel, check with the OZ Viezu dealers as see if they agree.

I had this bullsh*t from them too!

It's possible that locked ecus haven't reached OZ yet, although all Yeti ecus we've seen to date have been locked.

On the Scirocco, the ecus were locked around late 2009 for diesels, but some of the petrol ecu still aren't locked. But the Scirocco uses a different ecu type to the Yeti.