T5 tuning

[Sunny43.5]

The research (UK forums) I did on DPF removal was be vary careful about who does the coding. Some have no clue and just turn off the dash light but the ECU still thinks the DPF is there but its not so your not getting full benefit of having the tune allow for the reduction in back pressure.

Okay Ivo so if the code for the dash light is easily done what else has to be done to change the ECU,s mind ??? with the DPF removed ie either new pipe as listed or the alternative method ?? your help is appreciated .H

[h100vw]

Cutting open the DPF stripping the innards and welding back up is a better solution. I don't write the software so I can comment on exactly what is done with the tune. I have seen a couple of failed delete tunes though and they pump out a heap of smoke when the regen kicks in.

Gavin

[Ivo]

Okay Ivo so if the code for the dash light is easily done what else has to be done to change the ECU,s mind ??? with the DPF removed ie either new pipe as listed or the alternative method ?? your help is appreciated .H

I'm no expert Sunny, but from memory: Back pressure is massively reduced for the entire rev range when the DPf is gone so the turbo boost needs readjusting and so does fuel supply. Hence the improvements in performance when its gone. Also as h100vw said the regen process needs to be turned off in the ECU so it does not dump extra fuel in trying to regen.

[aussiet5]

i have read the same thing in the uk forums. delete is done which turns off the re-gen.
then a tuned is need to suit the different back pressure.
im pretty sure you have it right Ivo.

Originally Posted by duaned View Post
I've had a tune on my T5 transporter runner ( Blufin by superchips). Power is up and pulls hard in 3rd, but economy is down for sure. Ivo, who did your Viezu tune?

how much is your fuel economy down??? just out of intrest

[Ivo]

how much is your fuel economy down??? just out of intrest

No real change in economy, but no improvement either. I know what your probably thinking, performance has improved and economy has stayed the same so in effect economy has improved in relation to performance. But as I was one of the early Viezu customers here in Aus they gave me all 4 tunes to try. Ranging from trackday to super economy. I tried them all for a few tanks of fuel each for no improvement in mpg.

Other say they have seen some improvement, I got none.

[Sunny43.5]

Thanks Ivo for that info I know someone here in Qld who might be able to help so if I go down the road of removal of the DPF I will give them a call , you see my wife will drive this new van very little short trips and I can just see this DPF thing rearing its ugly head and causing a problem maybe .