2buickbob Posted February 10, 2009 Report Share Posted February 10, 2009 Hey folks, I bought a new LaCrosse last year and it has the 3800 V6. It's my first sedan, as I've always had a GM mid-size coupe (2 Cutlasses and 1 Regal). I came real close to buying a Monte Carlo LT with the 3.5 V6 VVT engine as I was shopping for the LaCrosse. I didn't do it because of the recent changeover in the engine and the addition of VVT. I understand it is mostly hydraulically driven by oil pressure. I've been told that this engine, in the many Impalas (and MCs) it's in, has NOT come back into the service department for work. You also see them in governmental fleets and taxi service in Las Vegas. Any personal experiences with the 3.5 and 3.9 Chevy VVTs? Any opinions? Quote Link to comment Share on other sites More sharing options...
swift13 Posted February 12, 2009 Report Share Posted February 12, 2009 no experience with the gm vvt but my caliber is vvt. i got no complaints about the car and the engine seems to take whatever i give it. whts good is the cvtII trans (no shift shock) off the line it is just a constant gain and you feel like your going alot slower then you really are. not sure if this helped any but thats my 2 cents Quote Link to comment Share on other sites More sharing options...
3pt1lumina Posted February 12, 2009 Report Share Posted February 12, 2009 I drive cars with these engines at work all of the time, and they run real nice, are powerful and don't ever see them come in for service (other than the usual oil changes). Quote Link to comment Share on other sites More sharing options...
5speedz34 Posted February 12, 2009 Report Share Posted February 12, 2009 no experience with the gm vvt but my caliber is vvt. i got no complaints about the car and the engine seems to take whatever i give it. whts good is the cvtII trans (no shift shock) off the line it is just a constant gain and you feel like your going alot slower then you really are. not sure if this helped any but thats my 2 cents GM doesn't have any CVT transmissions in their Colbalts. Quote Link to comment Share on other sites More sharing options...
Night Fury Posted February 12, 2009 Report Share Posted February 12, 2009 no experience with the gm vvt but my caliber is vvt. i got no complaints about the car and the engine seems to take whatever i give it. whts good is the cvtII trans (no shift shock) off the line it is just a constant gain and you feel like your going alot slower then you really are. not sure if this helped any but thats my 2 cents GM doesn't have any CVT transmissions in their Colbalts. Cobalt =/= Caliber Quote Link to comment Share on other sites More sharing options...
5speedz34 Posted February 12, 2009 Report Share Posted February 12, 2009 Stupid ass cars. Quote Link to comment Share on other sites More sharing options...
swift13 Posted February 12, 2009 Report Share Posted February 12, 2009 GM doesn't have any CVT transmissions in their Colbalts. i wasnt implying that a cobalt had a cvt trans just that it is nice to have. i have one in my caliber and i like the feel. the wife drives it but when i have to i dont mind. im not a big fan of small cars but what am i to do Quote Link to comment Share on other sites More sharing options...
2buickbob Posted February 24, 2009 Author Report Share Posted February 24, 2009 no experience with the gm vvt but my caliber is vvt. i got no complaints about the car and the engine seems to take whatever i give it. whts good is the cvtII trans (no shift shock) off the line it is just a constant gain and you feel like your going alot slower then you really are. not sure if this helped any but thats my 2 cents GM doesn't have any CVT transmissions in their Colbalts. Correct. No CVT in GM small cars...yet...it's VVT I was talking about...the variable camshaft system on some GM engines. Quote Link to comment Share on other sites More sharing options...
swift13 Posted February 24, 2009 Report Share Posted February 24, 2009 yeah my original statement was about the vvt but not for GM sorry for the confusion Quote Link to comment Share on other sites More sharing options...
Nofear048 Posted February 24, 2009 Report Share Posted February 24, 2009 The LZ8 3900 has the same Variable Cam Timing technology as the LZ9. The 2007 model year introduces the Active Fuel Management system (formerly known as Displacement on Demand), which can turn off a bank of cylinders under a light load for increased fuel economy. Output is slightly lower than the LZ9 at 233 hp (174 kW) and 240 ft·lbf (332 N·m). Which have in my chevy impala Quote Link to comment Share on other sites More sharing options...
2buickbob Posted February 24, 2009 Author Report Share Posted February 24, 2009 The LZ8 3900 has the same Variable Cam Timing technology as the LZ9. The 2007 model year introduces the Active Fuel Management system (formerly known as Displacement on Demand), which can turn off a bank of cylinders under a light load for increased fuel economy. Output is slightly lower than the LZ9 at 233 hp (174 kW) and 240 ft·lbf (332 N·m). Which have in my chevy impala That combination, found only on the 3900 and not the 3500, really scared me (VVT and AFM), possibly because I'm old enough to remember V8-6-4 in 80s Cadillacs, which were right up there in headaches with the initial 350 V8 unmodified Olds diesel engine. The 3900, with over 240 horses, is gutsy. However, the 3500, constantly returning 32 or 33 highway mpg in the Impala/Monte Carlo rentals I've had, really interested me. Quote Link to comment Share on other sites More sharing options...
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