Engine and modifications
Desired driving effect , instant boost, strong high end and so on.
The final HP goal
how fuelling will be dealt with.
Example.
325i ´88 8.8:1 compression stock engine
but with headbolt and mls gasket. Otherwise in solid shape.
want pretty quick boost and a farily low boost threshold(it comes in early in the revrange(this is not turbo lag)) and peak 350hp.
VEMS of course.
I would reccomend something like this.GT2871R
Should give very nice transitional response and is still within the high efficiency islands when at desired max power,
Will need to boost 1.2bar but that is totally fine(assumed is that VE doesn´t change)
Also applicable are turbochargers with similar sizes on the inducer and exducer on the compressor and turbine. Should give very similar results.
