colejl

of course, if you start from a higher bhp, then once you have tuned it the result will also be higher

but colejl, there is an exception. I spoke to kelleners about chip-tuning of the new 530d (231bhp part)
and they said that at best with a chip you can achieve the results of the older generation 530d (218bhp)...
Why? because the lighter manifold simply cannot take the pressure of such a high output... so here a higher engine output does not nevessarily mean higher tuned output
[/quote]
Fair point. With all things being equal - and they're not...