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How The 35 mpg Law By 2020 Will Affect The Cars We Will Drive

538 messages,  Last post on Jul 31, 2008 at 6:28 AM

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#128 of 538
Re: Aftermarket Engines [gagrice] by bumpy
Dec 28, 2007 (11:04 am)
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Replying to: gagrice (Dec 28, 2007 10:44 am)

I'm still trying to figure out how they managed to put two electric motors in the transmission and get it to tow less than the regular slushbox. It should be able to tow 25% more with the addition of the motors. The only thing I can figure is some cooling issue with the motor windings during extended use?
 
Also, the impending release of SAE towing standards is going to knock a lot of the puffery out of the current tow "ratings" anyway.
#129 of 538
Re: Aftermarket Engines [bumpy] by gagrice
Dec 28, 2007 (11:15 am)
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Replying to: bumpy (Dec 28, 2007 11:04 am)

It is the same with the RX400h and Highlander Hybrid. The motors will probably over heat under heavy loads. Not much good off road in heavy snow or mud either.
#130 of 538
Re: Aftermarket Engines [bumpy] by kernick
Dec 28, 2007 (1:16 pm)
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Replying to: bumpy (Dec 28, 2007 10:32 am)

bring the drag coefficient down to 0.275,
 
Since this is about the best of any car, are you suggesting the truck will have a similar body to a Corvette?
 
As for the rest, yes you will see more diesels in trucks (and cars), but I don't think that powertrain you're envisioning is going to work well in sub-zero weather, snowplowing, or pulling trailers uphills. You need an adequate engine in trucks, for those times when the hybrid batteries are depleted, or just several years old and not recharging fully (like new).
#131 of 538
Re: Aftermarket Engines [kernick] by bumpy
Dec 28, 2007 (1:36 pm)
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Replying to: kernick (Dec 28, 2007 1:16 pm)

It's not that difficult. The Mercedes S-class has a drag coefficient of 0.26, the Hyundai Genesis is 0.27, etc. Even the original blocky Lexus LS400 was 0.29.
 
The 2.5L V6 diesel by itself would be something like 220 hp / 350 ft-lb at a nice, low rpm, plenty for a half-ton.
#132 of 538
Re: Aftermarket Engines [kernick] by tpe
Dec 28, 2007 (3:02 pm)
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Replying to: kernick (Dec 28, 2007 10:07 am)

If Chevy could make a truck with 35 mpg that had truck-capabilities don't you think that would give GM the whole market?
 
Why would GM's trucks have to get 35 mpg? This 35 mpg is a fleet average. Obviously the larger vehicles wouldn't meet this and the smaller vehicles would exceed it. The Chevy Tahoe with the two-mode hybrid system is rated at 22 mpg. That's EPA, which is not what the new CAFE numbers are based upon. I don't know what agency's ratings they are using but my understanding is that the numbers are at least 20% higher. So this Chevy Tahoe would be 26 mpg for CAFE purposes. I think that GM could sell quite a few of these and still achieve a 35 mpg fleet average.
 
This Chevy Tahoe can tow 6,000 lbs. I'm guessing that if you look at all Tahoe buyers those that need to tow more than that are a very small subset. 6,000 lbs is a pretty substantial amount.
#133 of 538
Re: This will never happen [smithed] by superglide
Dec 28, 2007 (3:44 pm)
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Replying to: smithed (Dec 26, 2007 7:24 am)

I always have to laugh when I read these posts. I kinda have to assume that 99% of Americans never get out of the USA. I just got back from Europe, where gas is $10 a gallon in the UK. You'll quickly notice that most of the cars on the highways are little 3 door hatchbacks, and that most of the new vehicles sold in Europe are now diesels. You'll also quickly notice that there aren't any behemoth quad cab hemis rolling around. I took a picture of the typical "truck" in Florence. It's a 3 wheel scooter with a cab in front that holds 2 people, and it had a dump truck on the rear. Businesses over there do most everything with little scooter/trucks, and I'm guessing that saves them lots of moolaa.
 
It's also hilarious to see the big macho American male talk about how we can't function without behemoths that can "haul" and "tow". If you look at the percentage of trucks that EVER haul or tow anything, it would be like 5% I'm guessing. Manufacturers could keep building the monsters for those 5%, but the rest of us would figure out how to get the job done economically.
 
It was also interesting to see that Australia and New Zealand have no behemoth trucks either. Most passenger cars have bumper hitches on the rear, and when people need to haul something, they get out their trailers for that once a year haul. Most cars the size of an Accord can easily pull/haul their "caravans" (small RVs).
 
Face it... Americans have been buying big trucks and SUVs because they're the best value for the money, and there isn't anything else to pick from... not because they need to haul and tow. Even now I could go out and buy 20 full size trucks that cost less than my new Tacoma did, but I already know from experience that the Tacoma will cost me less to own because it gets better mileage and has better resale value.
 
Actually much of Europe (especially Italy) is functioning with scooters for transportation. It was hilarious to be sitting on a tour bus stuck in traffic, and watch them zip in and out of traffic while we went NOWHERE. And to answer the safety question... when vehicles can't go more than 30 MPH, it's easy for a scooter to get out of their way.
 
America is just way behind the learning curve. When low sulphur diesel gets here, you're going to see a new wave of smaller vehicles (already available and in use elsewhere in the world) being unloaded at our ports.
 
As soon as a diesel Tacoma (HILUX) gets here, I'll be first in line.
#134 of 538
Re: This will never happen [superglide] by kdhspyder
Dec 28, 2007 (4:13 pm)
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Replying to: superglide (Dec 28, 2007 3:44 pm)

Whether it's Toyota, Nissan, Ford or GM the first to offer a midsized diesel 4c or 6c will have a line around the block day and night. You might have to fight gagrice for the first one.
#135 of 538
Re: This will never happen [kdhspyder] by tpe
Dec 28, 2007 (4:24 pm)
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Replying to: kdhspyder (Dec 28, 2007 4:13 pm)

I do believe that diesels will make a resurgence in the US. What I wonder about is whether or not they'll get a mileage rating based purely on how far they can go on a gallon of fuel. Burning a gallon of diesel fuel does produce more CO2 than burning a gallon of gasoline. So if these higher CAFE standards are being driven in part by a desire to lower CO2 emissions then that needs to be taken into consideration.
#136 of 538
Re: This will never happen [tpe] by kdhspyder
Dec 28, 2007 (4:55 pm)
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Replying to: tpe (Dec 28, 2007 4:24 pm)

I believe that the new CAFE is being driven solely by supply side considerations nothing else. The ancillary benefit of less pollution is for PR benefit. The new CAFE 35 was afterall driven by the Republican Bush administration for at least a year now. No environmentals they, in general.
#137 of 538
Re: This will never happen [kdhspyder] by tpe
Dec 28, 2007 (5:20 pm)
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Replying to: kdhspyder (Dec 28, 2007 4:55 pm)

The new CAFE 35 was afterall driven by the Republican Bush administration for at least a year now. No environmentals they, in general.
 
I'm not sure what you mean by that comment. I'll admit that I supported Bush in 2000. I'm a slow learner but 7 years later he's clearly established himself as an idiot. But in terms of CAFE I don't think he can be attacked. The previous, Clinton, administration certainly didn't do anything to increase CAFE despite the fact that this was the heyday of SUVs where the domestics were actually profitable. IMO, when Bush leaves office his administration will rightfully be criticized for it's foreign policy but when it comes to environmental issues I think they can legitimately claim to be no worse than their predecessors.

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