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Chevy just officially showed the new Chevy HHR (PT Cruiser competitor) based off the Cobalt platform. There are two versions, LS and LT. The LS uses the 2.2L ECOTEC, but the 1LT and 2LT have the 2.4L VVT as an option and base. The official GM Media press release gives some information about the engine however.
Engines: Ecotec 2.2L I-4
Displacement (cu in / cc): 134 / 2189
Compression ratio: 10:1
Horsepower (hp / kw @ rpm): 140 / 104 @ 5400
Torque (lb-ft / Nm @ rpm): 150 / 207 @ 4000
Maximum engine speed (rpm): 6500
Engines: Ecotec 2.4L I-4
Displacement (cu in / cc): 145.5 / 2384
Compression ratio: 10.5:1
Horsepower (hp / kw @ rpm): 170 / 127 @ 6000
Torque (lb-ft / Nm @ rpm): 170 / 235 @ 4400
Maximum engine speed (rpm): 6500
I've highlighted the information that I found fairly interesting. I've added the 2.2L non VVT ECOTEC for comparison too. Also the older Twin-Cam 2.4L engine ran at 9.5:1 compression making 150HP. Until now we didn't know the new engines compression ratio, or at what RPM the HP and Torque was available.
From this information you can see where the power increase has come from. The extra 0.2L and the 0.5:1 compression increase, plus VVT moved the ECOTEC from the 140HP/150 lb-ft to the 170HP/170 lb-ft range. However the 2.4L engine has to go higher into the revs to get this power too though.
With a stock compression ratio of 10.5:1 I'm betting we're not going to end up getting a GM Performance Parts Supercharger addon kit
Engines: Ecotec 2.2L I-4
Displacement (cu in / cc): 134 / 2189
Compression ratio: 10:1
Horsepower (hp / kw @ rpm): 140 / 104 @ 5400
Torque (lb-ft / Nm @ rpm): 150 / 207 @ 4000
Maximum engine speed (rpm): 6500
Engines: Ecotec 2.4L I-4
Displacement (cu in / cc): 145.5 / 2384
Compression ratio: 10.5:1
Horsepower (hp / kw @ rpm): 170 / 127 @ 6000
Torque (lb-ft / Nm @ rpm): 170 / 235 @ 4400
Maximum engine speed (rpm): 6500
I've highlighted the information that I found fairly interesting. I've added the 2.2L non VVT ECOTEC for comparison too. Also the older Twin-Cam 2.4L engine ran at 9.5:1 compression making 150HP. Until now we didn't know the new engines compression ratio, or at what RPM the HP and Torque was available.
From this information you can see where the power increase has come from. The extra 0.2L and the 0.5:1 compression increase, plus VVT moved the ECOTEC from the 140HP/150 lb-ft to the 170HP/170 lb-ft range. However the 2.4L engine has to go higher into the revs to get this power too though.
With a stock compression ratio of 10.5:1 I'm betting we're not going to end up getting a GM Performance Parts Supercharger addon kit