There are loads around, this is just one as an example:

 

https://www.ebay.co.uk/itm/Performance-Power-Chip-Box-Tuning-to-SKODA-YETI-5L-2-0-TDI-110-HP-2009-3xM-UK/254177271934?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

 

From what I can ascertain all they seem to do is trick the ECU into thinking the fuel rail pressure is lower so that it extends the injection period = runs a richer mixture, is that correct, have I missed anything?

 

Sounds very primitive to me and I cant see how they can all claim increases in fuel economy.

 

On my PD engine I have a remapped ECU, a generic map to take it from 105hp to alegedly 145hp, the numbers dont concern me but I am very pleased with the way it drives, the new grunt and if i dont indulge too much in the extra power it is indeed more economical, it feels like and I assume that it does in fact increase the boost pressure throughout the rev range with fuelling adjusted to suit, am I wrong in that assumption.

 

Assuming i am right in both the above then surely simply enrichment of the mixture is not going to give the same performance gains and drivability as increasing the boost pressure and will come at a cost of both diminished fuel economy and also potential engine wear, EGR and DPF clogging.

 

Anyone who has one could they say how the experience has been for them?

 

I am considering it for a 108hp CFHF 2.0 Tdi Yeti.

Edited 21 October, 20196 yr by J.R.

I certainly wouldn't fit one. If much more expensive dual channel (fuel + boost) tuning boxes have people complain about them causing warning lights etc, what's the chance some eBay magic box will be any good at a tenth of the cost...

 

I guess if it's injecting more fuel than the ECU thinks, you can use less throttle which might increase fuel economy - or at least the figure shown on the dash is likely to increase?

 

Once the Yeti is back up and running, if you want more power, I'd definitely suggest taking it to a decent remap company and having it done properly :)

I have a bluespark pro sitting in the garage. Used it for 6 months before getting a proper map. It's a dual channel box with adjustable 'map'. It definitely gave an improved power with the same economy. I think where people get issues is when winding up the settings too high for what their engine can handle. Not all 2.0tdis are made the same so one setting won't work on all cars.

Interesting, thanks for that, like you I might consider it as a low cost first step, as I havn't even driven the vehicle yet it might be more nippy than I am expecting anyway.

 

How does your car compare with the standard factory map, the tuning box and the proper remap?

 

Do you find that the proper remap is value for money compared to the tuning box or was it for peace of mind or perhaps getting the maximum power?

 

Finally what was your stock engine, 110, 140 or 170hp?

Mine is a 150 which I understand is very similar to the 140.

If you think of the remap as 100% improvement the tuning box offered 75% for 25% cost. So, value for money the box is far greater. Especially considering the resale value. The reason I went for a map was for engine protection. I plan to keep the car and running it on a box long term may have been detrimental to dpf in particular.

 

If your 108 doesn't have a dpf then I'd say it's worth a shot. 108 is very low for a modern 2.0tdi. I imagine it would map quite well.  I also had my 105pd mapped and it was a new car after. The 150tdi isn't quite as dramatic in comparison but with a pedal box and bilstien shocks the whole package comes to life.

It has a DPF and has had the emissions fix so not a good starting point.

 

My current Octavia is/was a 105pd, not a patch on the MK1 110 but after a generic remap (exchange ECU) it is transformed.

 

Thanks for the clear explanation!