The Caliber SRT4's engine would never be confused with a Honda, but it's reasonably smooth and plenty powerful, even before
the turbocharger kicks in.
Boost: What happens when your supercharger or
turbocharger kicks in.
It uses the supercharger to fill in the bottom end of the power range to give the engine a big, naturally - aspirated feel, while
the turbocharger kicks in when the airflow builds up.
Above 37 mph (44 mph in E-Mode), when the battery level is low, or the driver requires more throttle power,
the turbocharger kicks - in to give an extra boost.
This lowers the compression ratio to 8.1, but because
the turbocharger kicks in at the same time, the engine's power output increases.
Tap the shifter paddle, there's a satisfying blip as second gear engages, more thrust, still more thrust as
the turbocharger kicks in, and before you know it, you've topped out at 40 mph in the parking lot of BMW's New Jersey headquarters and with a German engineer riding shotgun.
But the engine does grunt when you push it especially when
the turbocharger kicks in.
Much like the rest of the Drive - E engine range (which are all four - cylinders) a supercharger is used to give boost when accelerating, while
the turbocharger kicks in when the airflow builds up at higher speeds.
Now, a 2.0 - liter four with a wastegate
turbocharger kicks up 300 horses and 280 lb - ft, the latter a 31 - percent bump.
The turbochargers kick in at higher speeds.
Turbochargers kick in on demand to provide a surge of responsive power when needed.
Not exact matches
Things
kick off with the SL 400, which makes use of a 2996cc V6 with twin
turbochargers for a 362bhp power output (from 5500 - 6000rpm), and 369 lb ft of torque between 2000 and 4200rpm.
The
turbocharger in this 335i seems more prominent than in other BMWs I've recently driven — you can hear the whoosh and feel the boost
kick in more strongly.
Throttle response is not as linear as in a normally aspirated engine — you can definitely feel the rush of the
turbocharger — but max torque comes on at a low, 1650 rpm, so it's not like you're waiting around for the turbo to
kick in.
When the electric motors
kick in, power delivery comes on as if from a
turbocharger, roundly but forcefully.
The
turbocharger, a pump in the exhaust system that blasts more fuel into the cylinders,
kicks in seamlessly.
Indeed, with a little step in the powerband around 4,000 rpm when the
turbocharger gets serious about force - feeding the little four - banger, there's just enough of a
kick in the pants to give the little sedan a little vim.
Thanks to the
turbocharger, even 138 horses feels like much more when the turbo
kicks in, resulting in 148 lb.
It's almost as if a
turbocharger were suddenly
kicking in.
Using BMW's TwinPower twin - scroll
turbocharger, the gasoline engine
kicks out 252 horsepower and 258 pound - feet of torque.
The DZire's engine revs faster and is more sportier as the Zest even with a
turbocharger doesn't have that
kick in the pants feel.