I have run a tuning box by dtuk. on this engine cdti 1.9 16v vauxhall signum and then on a zafira both 150 bhp models. I did 37k in the signum from 9k when Ihad it put on to 45k when I sold it, there were no problems. Then I put the same box on the zafira that had 68k when I conected it, at 76k the dreaded swirl valve failed, (rod off) this clogged the DPF and it needed AA recovery, £800 At vauxhall to change loads of un-needed parts, after 2 spurious DPF's fitted and removed I finally had the DPF brick removed and a re-map by northwales tuning. I had just the DPF delete done not the EGR too. I DIY fixed the swirlvalves with info from a thread on a forum and then ran remapped and no DPF. (the tuning box was removed first) the swirl valve fix lasted a year and was still going strong after 14K miles when I traded the car in.
I am going to be 100% honest!!! the car ran better more power all over, 3 Mpg improvement in all conditions so thats average all round driving real world.
There was a downside!
On start up first thing there is blue smoke for about 10 secs and a smell! Then the engine would run fine smoke free! (the blue smoke was like valve stem oil seal leek on old ford RS turbo that only happend on frist start up.) back to remap: when driving normally she was fine Untill you nail the car or accelerate hard then there is soot Galore ! which is nasty if you ease off the soot goes. And if you accelerate hard a few times there is a little less soot each time as if its clearing a build up.
I am getting my car remapped in the next fortnight by ecotech in north wales. Its only a generic map and fairly cheap they will do DPF delete and EGR delete free with that but I would have to remove the brick myself, so wont bother at the moment.
I hope this helps because its honest feedback from real world conditions.
I had no clutch or gearbox issues at all and never have on any chipped car escort Rs turbo 250bhp heavily modified and a Rover 220 turbo coupe also about 270 bhp.
The other thing to mention is tyre and break pad wear are increased!
one more thing to mention is in some cases insurance can actually go down with a modded car not always an increase Adrian flux was cheaper than standard on 2 occations in the past. Both on escort RS and 220 Turbo. either way I would tell them.
Last edited by Alfa male 1; 17-09-11 at 22:15.