Join Date: Feb 2013
Location: Aussie in Sweden
MOT - According to the Telegraph, as of last year the removal of a DPF is an instant MOT failure. So I guess you could be lucky and they don't notice, but if they do, no MOT for you.
Smoke - Regarding smoke, you should see an increase (how dramatic I couldn't say) in soot/smoke blowing out through the exhaust as you might see on older diesel cars. Given that its a relatively modern engine, it probably wouldn't be too bad but without actually deleting the DPF and finding out, its hard to really gauge just how much of an impact it will have.
Possible engine issues - Shouldn't really have any impact on the engine. If anything, it could actually make the engine less prone to issues given that you no longer have a DPF getting full of crap.
Tax - no idea
Acceleration/Delay - You should get a minor boost to performance and MPG given that you are no longer using fuel to burn the particulates in the filter and you are removing some restriction in the exhaust system. But not too sure exactly just how much more improved the performance would be. I wouldn't imagine it would be a huge different but it might rev up a little quicker given the lower restriction?
2000 Alfa 156 Sportwagon 2.0 TS CF3
2002 Alfa GTV 2.0 TS CF3
1983 Porsche 944