BMW Prepping A 449 HP Tri-Turbo Motor For X3 M?

In series or parallel?

I'm guessing since they picked 3 (for a 6-cylinder), it's parallel, no?

I read on another site if they use a V6 based off the M5 it would have two turbos in the traditional spot, and one electric turbo in the V between the cylinders.

I'm sorry but BMW is so late to the turbo game that it isn't even funny. Didn't BMW once say that they will never build a turbo road car?

In 1973 BMW was the first German car manufacturer to have a turbo car on the market...the BMW 2002 turbo.

The first turbo Porsche came out in 1974, Mercedes 1978, Audi 1979.

1962 Oldsmobile Cutlass Jetfire
1962 Chevrolet Corvair Monza Spyder
1973 BMW 2002 Turbo
1974 Porsche 911 Turbo
1978 Buick Regal
1978 Saab 99
1978 Peugeot 604 turbodiesel
1978 Mercedes-Benz 300SD turbodiesel (United States/Canada)
1979 Alfa Romeo Alfetta GTV 2000 Turbodelta
1980 Mitsubishi Lancer GT Turbo
1980 Pontiac Firebird
1980 Renault 5 Turbo
1981 Volvo 240-series Turbo


They wernt that late, only GM beat the Germans to it...by a decade.

Probably Germans were late on developing a turbo car, but who has proven to be more successful out of all cars in the list above?

BMW built the 2002 turbo in 1973. I dont think they built another Gas engined Turbo until what? The 2007 BMW 335? Some of the other makes have been making turbos the whole time in between. I'd trust a Mitsubishi Turbo sytem over a BMW Turbo system. Chances are that the BMW uses Mitsubishi turbochargers.

Blazin boy, I have an 85 745i. the first e23 745i has a the 3.2l from the 733i but turbo charged. in 84 it was increased in size to 3.4l and kept the same 252hp but with only 6psi of boost and made more torque than the older one did with 8psi. I am running 16psi with a cartech rising rate fmu, modified adustable wastegate, and a modified ecu. These cars can run up to 16psi on the stock fuel system provided it is in tip top shape and easilly exceed 400hp. Mine has about 399 hp to the rear wheels and about 496 lb/ft torque on 98 octane gas. It runs fine on 93 but racing fuel really wakes it up. It is very fast, however it is hindered by the super tall 2.93 rear end. I can get over 60 mph in first gear. Boost kicks in at 2,600 rpm,a nd by 3k it is flying. in first when I get to about 25-30mph the rear tires break loose and it will smoke them. They are a beast on the highway. I have beaten a 94 vette, 97 Camaro V8, and a GTO 6.0l on the interstate. With the tall gears it does on ehell of a burnout as the tires are spinning over 60mph, verses 30-40 in other cars. It is a good sleeper. I love it.

I still don’t think soccer moms need the ability to lunge kids off the soccer practice with this much power. Every BMW SUV doesn’t need an M variant.

Nor Mercedes with their SUV AMG variants, nor Porsche with its Cayenne S or Turbo.

BUT, if people are willing to pay for the power, who are you to prevent them from buying powerful SUVs?

Another car nobody asked for?

To put turbo(s) to the petrol engines are much cheaper engineering development than the efficient and reliable hybrids(for some manufacturers).
BMW much late to develop hybrid.
What is the next step? Parallel turbos for every cylinder? Sequential turbos driven by electric motors? Acustic segment chargers operated with electromechanical oscillators?
I think BMW engineers forget some factors about turbos:
- High NOx emission, because high temperature burning on high pressure.
- Questionable reliability because complexity.
- Special lubrication technology required for turbo(s) in case Stop-Start operation.
- Heavy weight parts.
- Overheat risk.

nice article

People need to seriously shut up about "BMW turbos". BMW most likely sources these turbos from a supplier. Many components in modern cars are sourced from external (international) suppliers. BMW uses ZF transmissions for certain cars, Mercedes uses Delphi injection ports for their diesel engines, Toyota uses a German electronics supplier for their headlights etc.

@outsider: on one hand you argue against the turbo because of "heavy weight parts", on the other hand you prefer the hybrid. Ever thought about the weight of batteries in a sports car??? What are you talking about???