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Car Forum / GMC Cars / June 2006Why Does the 3.9 G6 Convertible have 13 less HP the the Coupe?
The 3.9 G6 coupe as 240 hp yet the 3.9 convertible is only rated at 227 hp. Why? What are the differences in these identical engines? I was thinking bout getting the convertible but feel short changed. > The 3.9 G6 coupe as 240 hp yet the 3.9 convertible is only rated at 227 > hp. Why? What are the differences in these identical engines? I was > thinking bout getting the convertible but feel short changed. No one can answer that for you...its unexplainable. Just order your convertable but tell them to put the coupe engine in it. If it is a fact that the HP output is different, my guess is GM is using a different cam to better match the HP to the torque to provide a better performance curve for the heaver convertible. Higher HP at higher RPMs is common with Japanese cars but that is why they lose a lot of the much more desirable torque, at the proper RPM mike >> The 3.9 G6 coupe as 240 hp yet the 3.9 convertible is only rated at 227 >> hp. Why? What are the differences in these identical engines? I was >> thinking bout getting the convertible but feel short changed. >> > No one can answer that for you...its unexplainable. Just order your > convertable but tell them to put the coupe engine in it. > The 3.9 G6 coupe as 240 hp yet the 3.9 convertible is only rated at 227 hp. > Why? What are the differences in these identical engines? I was thinking > bout getting the convertible but feel short changed. Maybe it takes 13HP (at full load) to run the hydraulic pump for the roof. Steve >> The 3.9 G6 coupe as 240 hp yet the 3.9 convertible is only rated at 227 > hp. [quoted text clipped - 4 lines] > > Steve It would take that much when putting the top up at highway speeds. >> The 3.9 G6 coupe as 240 hp yet the 3.9 convertible is only rated at 227 > hp. [quoted text clipped - 4 lines] > > Steve That has nothing to do with engine output, its just an engine accessory like a/c or and altinator that would reduce power at the wheels not the engine itself. > >> The 3.9 G6 coupe as 240 hp yet the 3.9 convertible is only rated at 227 > > hp. [quoted text clipped - 6 lines] > a/c or and altinator that would reduce power at the wheels not the engine > itself. Oh right. Well, maybe they lowered the output because the car is heavier and they wanted the fuel mileage to be par with the non-convertible. Steve >> >> The 3.9 G6 coupe as 240 hp yet the 3.9 convertible is only rated at >> >> 227 [quoted text clipped - 19 lines] >Maybe...if I get one I would have the Computer chip reprogrammed to up the >HP. > >Maybe...if I get one I would have the Computer chip reprogrammed to up the > >HP. Why are we even concerned about 13HP on a sub-$30,000 car? >> >Maybe...if I get one I would have the Computer chip reprogrammed to up > the >> >HP. > > Why are we even concerned about 13HP on a sub-$30,000 car? If your car has 500HP, 13 HP isn't going to make much difference. If it has 240HP, you could probably feel a 13HP difference. > >> >Maybe...if I get one I would have the Computer chip reprogrammed to up > > the [quoted text clipped - 4 lines] > If your car has 500HP, 13 HP isn't going to make much difference. If it has > 240HP, you could probably feel a 13HP difference. True, but doesn't say why you would be concerned with 13HP on a sub-$30,000 car. > > >> >Maybe...if I get one I would have the Computer chip reprogrammed to up > > > the [quoted text clipped - 8 lines] > True, but doesn't say why you would be concerned with 13HP on a sub-$30,000 > car. And why should we be concerned about 13 HP on a $30,000 and up car? Stan > > > >> >Maybe...if I get one I would have the Computer chip reprogrammed to up > > > > the [quoted text clipped - 10 lines] > > And why should we be concerned about 13 HP on a $30,000 and up car? Not saying you should. I just figure the more you spend the more you are concerned about certain things and less about others. I just bought a sub-$30,000 car, I had no idea how much HP it had until a few days after I bought it, but I knew lots about the fuel mileage, safety and reliability. If I was going for a $100k+ vehicle, I would be more concerned about things like paint quality, HP, tires, brakes, etc. Steve "Stan Weiss" <srweiss@erols.com> wrote in message >> True, but doesn't say why you would be concerned with 13HP on a >> sub-$30,000 >> car. > > And why should we be concerned about 13 HP on a $30,000 and up car? > Stan Why should we NOT wonder abut it in any priced car? I'm not interested in buying either model, but I'm curious about the difference. >> > >> >Maybe...if I get one I would have the Computer chip reprogrammed to >> > >> >up [quoted text clipped - 14 lines] > And why should we be concerned about 13 HP on a $30,000 and up car? > Stan Maybe because you want the extra power of 13 horses. What does it matter if the price is about 30k? > > >> >Maybe...if I get one I would have the Computer chip reprogrammed to up > > > the [quoted text clipped - 8 lines] > True, but doesn't say why you would be concerned with 13HP on a sub-$30,000 > car. We just deserve what is due....if the coupe has 240 hp why be punished with only 227hp just because you want a convertible. "Muhammed Steinberger Jr." <Ak554@server.net> wrote in message > We just deserve what is due....if the coupe has 240 hp why be punished > with > only 227hp just because you want a convertible. Punished? There may be a very logical reason once we find out. . I would think the Pontiac dealer should be able to find out though. It does seem strange that they would make a change in cam, compression, or most anything for 13 hp. I also have to wonder if the web page has wrong information where something was not updated. Could be the convertible needs a different exhaust/header layout and causes a power loss. Different timing from the computer for some reason? Note that the SV6 has different ratings on the two models for the 3.5Lengine also. 196 vs. 201 Seems like Pontiac uses a lot of different engines in its line they have at least five displacements and sometimes two versions of each. The Impala uses a 3.5Lwith a 211 hp rating with variable valve timing, yet the Malibu is 201. With all that said, how important is the hp rating? It is not the power, it is what you do with it. So many other factors come into play like wheel size, tire size, gear ratios, etc. >Note that the SV6 has different ratings on the two models for the 3.5Lengine >also. 196 vs. 201 Seems like Pontiac uses a lot of different engines in its >line they have at least five displacements and sometimes two versions of >each. The Impala uses a 3.5Lwith a 211 hp rating with variable valve timing, >yet the Malibu is 201. Sometimes I wonder if the stated ratings aren't just purposefully understated for some models for marketing reasons. No one ever gets in trouble for understating a bit. For example, when the base model Vette and the V8 Fbodies both used the same LS1 engine, the Fbodies were stated as having about 30 less HP or so. Yet gear heads that don't work for GM seem to find that in fact they produce about the same as the Vette (not the Z06). >>>>>> Maybe...if I get one I would have the Computer chip reprogrammed to > up [quoted text clipped - 10 lines] > We just deserve what is due....if the coupe has 240 hp why be punished with > only 227hp just because you want a convertible. My God, will you listen to yourself whine! "We deserve what is due ..." First of all, what is "due" is what is advertised. It may not be what you'd like, but it's what was promised and what is "due." Second, you could easily feel the difference between zero horsepower and 13 horsepower, but I'd be damn surprised if you could feel much difference between 227 and 240. Torque is where you live, not horsepower. Yeah, maybe you COULD find some jackass to reprogram the chip, but he'd likely spoil the emissions package. Third, there's likely a weight penalty for the convertible body, and that could well put the vehicle into a different emissions class, necessitating engine modifications to preserve compliance. >>>>>>> Maybe...if I get one I would have the Computer chip reprogrammed to >> up [quoted text clipped - 24 lines] > emissions class, necessitating engine modifications to preserve > compliance. OK, then why does the convertible also have less torque than the coupe? |
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