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Rich,
Well remaps can be taken like tuning boxes, they all dont work the same. I know of some remaps that adjust certain data like fuel pressure, boost pressure etc and others just adjust one part of data and so on, depending on the developer and the same with tuning boxes, being CR pressure increase or PWM (pulse width modulation) or the extremely nasty (in my opinion) connect on the cold sensor!!
On the peizo system which is on some of the later cars like the BMW 2.0d 177bhp, increasing the common rail pressure will not give great results. Infact our tuning on the VAG group cars on there 170bhp 2.0tdi peizo system we have a world wide patent for. This means anyone that is producing or selling for this system (on VAG not BMW) without our consent could get into trouble. We invested heavily in this development hence why we patented our tuning method!
Totally agree about Bosch MAF's they should be either kept cleaner or replaced every 30-40k.
Also just one thing I would like to point out, I'm not advertising or mentioning our company on this website so I have nothing to gain through it, this is purely done because I wanted people to know (in my opinion) how tuning boxes and remaps work.
Everyone says 'oh a remap is better' its simply not the case, as a remap can be simply working in the same method as a tuning box. One down side to a remap is your not actually buying anything with your pennies (apart from some data that you will never see) atleast with a tuning box you do own something, something that be sold when you have finished with it and something that you (usually) have a warranty with !!!!
I think I will stop there now, I have expressed my opinion and hope readers have found it interesting (probably not listening to me waffle on!!) and hope i have shed some light on this topic.
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