If you have a dyno you save the charts for review later at any time in the dyno´s database.
That´s how things are done, even shops that get clients in to do tuning do that.
If your dyno doesn´t do that, it´s time for an upgrade.
The aftermarket is 99% BS.
WOT part of the chip can be tuned easily enough on a dyno and surtenly doesn´t take a day, as a standalone doesn´t take a day to do a full fuel and ignition map.
it´s the part throttle and accelaration enrichment that are the KEY elements to be tuned on a BMW system,
I have noticed that the 173 and other Motronic 1.3 ecu´s have bad transitional fuelling while the grey market Motronic 1.0 for the E30 325i 9.7:1 engine is great transitional fuelling, a chip I had in a motronic 173 developed by a ecu tuner of 20years+
and has revisited the chip on occasions through the years has to be the most amazing chip I have ever had, no other chip I have ever had was that great.
Here is a dyno dynamics chart from it, engine had 200k miles on it.
The 177hp line is the original engine with 200+ on it, fair compression and motronic
the 178hp line is after I installed VEMS on the car and replaced the engine with a BONE stock high compression engine (´86 original headgasket) original headbolts as well.
it´s compression was also fair but #6 was real weak.
See what I did there? I presented information that will make sense and not just promise this or that........
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