Questions

[Fraser19]

Hey guys
so I have had my 2004 330ci for a bit and have done a lot of reading and still have lots more to do but I have some questions.
I think Forced induction in my car would be an awesome thrill. There are many options and I need some input.
As I understand the AA and VF kits are both centrifugal kits and the ESS is a Twin screw and there is the TT turbo kit.
Now what has the least harsh effect on the engine and drive train? Not so much what kit but centrifugal, Twin screw or turbo?

Back when I was in high school I was taking mechanics and my teacher said superchargers were the hardest on engines.
He explained the boost was instant and not a build up like in a turbo and as a result that would shock the engine and is more likely to break connecting rods. He also said the same for the drive train the instant boost would send too much of a shock and break stuff.
There is also the aspect of the engine drag from the belt used to power the supercharger with estimates of taking 20hp to keep it turning with a result of bas gas milages and increased engine wear.
So obviously he is in favor of turbo but this was all 10 years ago and many advancements have been made and we were not talking about BMW’s back then.

So what do you guys think?
What creates the least wear on the engine if they are all used in the exact same way?
centrifugal? Twin screw? Turbo?

[pbonsalb]

No car manufacturer uses centrifugal superchargers. Some use positive displacement (twinscrew) superchargers. Many use turbos.

If you want the one that produces the most gradual and lowest overall power gains, it is the centrifugal. Making less power means you may spend more time near redline trying to enjoy the power there is. But assuming you won't do that, the centrifugal is probably easiest on the engine.

[Fraser19]

So you would go for the centrifugal?
OK but why? I think You states it will cause the least wear if making less power and kept away from red line.
I want to know what one will be easiest on the engine if they are all producing the same power and driven the same way.
It's not the wear from the extra power, but the wear from the delivery of the power.