Mines mapped with the +10 chip, tis a bit smoky on full poke, but the power increase and torque throughout the rev range is addictive.
My personal experience of chipping TD's, more so on other cars,
Is that more fuel is not a problem, and then ideally, with more fuel comes more air.
On other cars i have done this by increasing air flow (sports air filters, decats, etc) but also more crucially by turning up the turbo just a couple of PSI. Nothing too much, just enough to make use of the extra fuel to create more overall power.
That fuel which is not burnt up by the engine is sent through the exhaust and comes out as black smoke. This is not a dangerous sign, it just means that when the throttle is fully down, more fuel than necessary is being pushed through the system. In essence the system is running rich (in petrol terms), but Diesels are designed to run rich naturally.
Even an untuned td will give off some smoke, hence why diesels are always black on the back if left without being cleaned for a while.
The only issue i have found on other cars (not the Omega to any real extent), is that on a heavy overfuelling map, that excess unburned fuel can cause excessive exhaust temperatures which can possibly be a danger to the engine.
My Rover would heat up more than i should (reflected in the coolant temp) when i was driving very hard.
As yet, the Omega only rises around 1 degree extra over stock temp, and i imagine that is down to not only me driving it faster than usual, but also a slight overfuel.
I have no experience of the +5 chip, but I think i am right in saying that it is only bringing it back to just over the original BMW spec of the engine and therefore cannot really be considered "tuning" as such, more a case of a returning the engine to its designed power.
And if you do not know why, as mentioned in other posts, this DE-tune was done by vauxhall for what must have been issues to do with their original Auto boxes. And despite subsequent revisions to the box, and of course the manual being available, they did not offer different power specs.
Vauxhall definitely did not do it for economy reasons either, as the standard MPG of the Omega is lower than that of a standard BMW.
.......I may have blabbed for a while there, sorry if i have monumentally wasted moments of your life lol
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Topic: Will Re-mapping an omega 2.5td damage it? (Read 815 times)