Quote:
Originally Posted by Ed_rx7
Will it work for diesels?..... And where would it plug into? Various sensors or just one? I like to know that various parameters are being looked at rather than just boost or fuel for example
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Hi
They do work for diesels and a few are available for x1 b47 Diesel engines. Plug in boxes appear to connect (via adapter sockets and plugs) into common rail pressure sensor (and some also into maf sensor). They leave all existing vehicle hardware and software in place and unaltered. According to marketing info they can be removed for servicing/warranty claims and BMW would not be able to tell (unlike mapping). Several videos on line show, easy plug in, tidy up with a few cable ties and go.
I believe they work by intercepting car electronic signals and modifying them, for example telling the car that the turbo boost is only at 0.5 bar instead of 0.7 bar and therefore getting the car ecu to increase turbo boost. Altering signals from sensor in the common rail and maf (mass air flow sensor) work by increasing the amount of fuel injected (or with some boxes simply increasing the fuel pressure) by changing the air mix. My understanding is that plug in boxes are good for stock factory engines but will not really work for modified/tuned engines. For x1 bmw diesel b47 some vendors claim they increase hp by 35 (so from 190 to 225).
I had a tuning-diesels.co.uk box fitted in my old freelander (which had a bmw 2.0 turbo Diesel engine for 3 years and it worked very well. Different power or torque increases could be selected. Please note, I went to a specialist insurance broker (was only about 15 % more expensive than regular internet mob), not doing so could, in the event of an accident, mean no insurance cover (not cool trying to crawl out of a ditch and unplug the electronics before police arrive!)
Finally, I am not recommending either way. I probably would not fit one whilst my car was still in warranty.