I, like many before, have changed many aspects of our cars, with a combination of cosmetic, functional, handling and powertrain modifications.
The question I'm asked and I ask myself is how do these changes impact on the 'performance' of the car.
So what I've done for both Z4 E89s I've owned is try and chart the broad impact of the powertrain and chassis modifcations in three scenarios, two theoretical, short and long track and one real, fast road use.
The changes didn't actually happen neatly sequentially but I've grouped them together for simplification.
The theoretical versions for track use place emphasis on things that are not as relevant for road use eg powerful brakes rather than say softer long travel suspension is not relevant for track use but important for use on public roads.
Its one man's view, and based on my type of driving (probably described as upper quartile driving at speed) on open, uncongested, derestricted roads that we in Scotland can enjoy so much.
I've compared my 2012 20i MSport Auto against my 2011 35is.
Enjoy!
The question I'm asked and I ask myself is how do these changes impact on the 'performance' of the car.
So what I've done for both Z4 E89s I've owned is try and chart the broad impact of the powertrain and chassis modifcations in three scenarios, two theoretical, short and long track and one real, fast road use.
The changes didn't actually happen neatly sequentially but I've grouped them together for simplification.
The theoretical versions for track use place emphasis on things that are not as relevant for road use eg powerful brakes rather than say softer long travel suspension is not relevant for track use but important for use on public roads.
Its one man's view, and based on my type of driving (probably described as upper quartile driving at speed) on open, uncongested, derestricted roads that we in Scotland can enjoy so much.
I've compared my 2012 20i MSport Auto against my 2011 35is.
Enjoy!