Firstly, I think sarcasm can be very funny when warranted by the right circumstances. If you lightened up a bit perhaps you'd have enjoyed my statement too.
I stand by the fact that your claim of 30-40hp is ridiculous. With the experience you state you have you should realise that. If you think carefully about it, do you honestly believe you could gain that (or even the 28hp you claim you saw) on an otherwise standard motor by remapping, and all this for 300 quid! Don't you think manufacturer's and especially BMW would use some of that. And please, no excuse about different RON/MON/air temperature etc: the motor is mapped for Europe.
And then you make it worse by stating you weren't happy with a gain of 28hp! What on earth did you expect?
Anyway, don't take this as a personal dig. I'm not challenging you, just the data.
BTW, I would suggest 10-15bhp is a more reasonable expectation.
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