IHI turbos on the BMW
10-15-2007, 07:40 PM
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IHI turbos on the BMW
Funny that the Germans still need Japan help in the force induction arena.
TECH HIGHLIGHT: TWIN-TURBO SIX
0610_bmw_335i_motor.jpgBMW’s first U.S.-market gasoline turbo, a 3.0-liter blown six-cylinder, has two small IHI turbochargers that each pressurize three cylinders with a maximum of about nine psi of boost. Direct fuel injection, a first for a BMW gasoline turbo engine, helps to cool the intake charge and allows a high 10.5:1 compression ratio. The block is made from aluminum, not magnesium and aluminum as used in BMW’s naturally aspirated straight-sixes. Horsepower is 300 at 5600 rpm, and the peak torque of 300 pound-feet arrives at just 1400 rpm and hangs on until 5000 revs. We’ve driven the 335i, and if there’s any turbo lag, it’s infinitesimal.
TECH HIGHLIGHT: TWIN-TURBO SIX
0610_bmw_335i_motor.jpgBMW’s first U.S.-market gasoline turbo, a 3.0-liter blown six-cylinder, has two small IHI turbochargers that each pressurize three cylinders with a maximum of about nine psi of boost. Direct fuel injection, a first for a BMW gasoline turbo engine, helps to cool the intake charge and allows a high 10.5:1 compression ratio. The block is made from aluminum, not magnesium and aluminum as used in BMW’s naturally aspirated straight-sixes. Horsepower is 300 at 5600 rpm, and the peak torque of 300 pound-feet arrives at just 1400 rpm and hangs on until 5000 revs. We’ve driven the 335i, and if there’s any turbo lag, it’s infinitesimal.
