Hello there and welcome to the BMW Car Club of America.

If you are a BMW CCA member, please log in and introduce yourself in our Member Introductions section.

Supercharger or Turbocharger

Discussion in 'E46 (1999-2006)' started by Casseus330iZHP, Jun 15, 2008.

    Casseus330iZHP guest

    Post Count: 13
    Likes Received:0
    Whats the Pro's and Con's?? So far i know superchargers puts constant strain on engine...but other than that clueless as far as which IS better for my str8 inline6 3.0L?

    Kent Bullis guest

    Post Count: 9
    Likes Received:0
    You will get replies from people far more knowledgeable than I, but just to get you started:

    I believe that in the past, superchargers had the advantage of being a little more straightforward to install (no need to tap into the exhaust) and a very quick response to the throttle, whereas turbochargers had the advantage of better gas mileage. Some of the early mass production turbo's (one thinks of mid-80's Chrysler products) you would step on the gas and about 3-5 seconds later the car would begin to accelerate, but if you weren't actually pushing it hard you really had no impact on the gas mileage, whereas a supercharger would cause your gas mileage to deteriorate just by virtue of sitting there.

    Modern engineering has dramatically improved the lag time associated with turbos. I haven't driven a modern turbo, but when you read the reviews on, for instance, the 335i, they talk about almost imperceptible throttle lag time.

    I hope this gets you started!

    Kent Bullis guest

    Post Count: 9
    Likes Received:0
    I should note that you'll see some differences in the power curve between the 2 as well. That is to say, a supercharger is more prone to give you additional power starting at idle speed, whereas a turbo tends to provide minimal power boost at idle speeds, and then pick up substantially as RPM increases. Again, I suspect they have improved, but not entirely eliminated this with modern turbos. If you have a manual and you rev it up and dump the clutch, then you probably don't care. If you have an automatic and you are doing a standing start, I think you'll get a quicker take-off with a supercharger.

Share This Page