Amazing, Chevy builds a 330 HP engine with 28mpg Options

[Hawktel]

So the new Impalla that chevy has released has a option for a 330 HP V8 with 28 highway fuel consumption.

Thats amazing. Just amazing. I wonder how far fuel efficency can be pushed?

[Elliot_Cannon]

28 miles per gallon at what speed? 55? 60?
Elliot

[Hammy]

Had to be a typo (IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif)
How is that possible? (IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif)

[Hammy]

From Chevy site

QUOTE

...That’s because only four of the eight cylinders are activated during some driving conditions to increase your fuel economy – up to an estimated MPG 28 highway.1 When you need full power, the other four cylinders are reactivated.

I know another car had this feature before... I forget which one. I'm pretty sure it was German. I'm thinking Mercedes? (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif)

[Twystd1]

My bro has a 2003 Vette with the z06 package and about 400 ponies to play with.

he typically gets about 30 MPG from LA to vegas...

IF he is mellow and stays between 70 and 80 MPH. And keeps it in 6th.

These are REAL numbers. Cause I was with him..!!!!!!!!!

Then again.. if he stands on it and gets into a race for a 100 or so miles.. The MPG goes down to ZIP...........

Twystd1

[DonTraver]

Cadilac's (sp)

[TravisNeff]

Ayup, my Dad has a the last year WS6 Trans Am with a 6 speed. Drove from Seattle to Phoenix and got very high 20's. Damn thing in 6th gear at 80MPH - the car is just barely braking idle

[redshift]

Simple: The stated EPA milage is an F'ING LIE.

Just read a report, stated can be as much as 35% higher than actual, depending on condition, and the hybrids were the worst liars. (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)



M

[sean_v8_914]

I just drove a new Vette on a mini AX style track this thursday. 400 HP and 28 MPG, no gas guzzler tax. since wind resistence is non linear and the Vette has a small frontal cross section, 28-30 mpg is beleivable. it also has that feature that shuts down cylinders based on demand.

at 3150lbs, it's slower than my 914 (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) hadta brag (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)

[Hammy]

How does the vette handle?

[TimT]

Im sure the vette handles pretty well..

the assholes on pelican trashed a guy for posting about the new corvette.

I think as mentioned above, that cadillac had an engine that would lose cylinders to run more efficiently

It was badged 8-6-4 or something, it didnt work that well

[Gint]

QUOTE (TimT @ Sep 18 2005, 05:42 AM)

Im sure the vette handles pretty well.. the assholes on pelican trashed a guy for posting about the new corvette. I think as mentioned above, that cadillac had an engine that would lose cylinders to run more efficiently It was badged 8-6-4 or something, it didnt work that well

That was it. The Cadillac V8-6-4. I knew a lady that had one back in the day. The technology of the time couldn't make it work extremely well. There are now several manufacturers doing cylinder shutdown technology. I'm sure today it works better than it did in the early 80's. What the hell eh? Whatever works.

Personally, I'd love a new Vette and I don't care what anybody has to say about it. At least it's not a Miata. (IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)

[Dr Evil]

I believe it is called "variable displacement." My friend was telling me that the original design had issues with the pistons, crank, and rods getting goofed up when someone would want more power and they were switching from 4cyl to 8cyl. Supposedly, the new design has features that protect the engine from this.

[seanery]

Chrysler has been doing the multiple displacement thing for a couple years with the Hemi in it's cars and now trucks. It's a 4 cylinder then an 8 when needed.

[Pugbug]

They are all liars!...This from Consumers Reports.

Fuel economy
Why you're not getting the mpg you expect

For years, automakers have been criticized for producing vehicles that get so-so gas mileage. But as gas prices climb and consumers seek more miles per gallon, it turns out that fuel economy is much worse than it appears--50 percent less on some models, a new Consumer Reports analysis reveals.
Drivers who track their own fuel economy have long known that their results seldom match the gas mileage claimed by the Environmental Protection Agency on new-car stickers. Our study, based on years of real-world road tests over thousands of miles, quantifies the problem across a wide swath of makes and models.

We compared the claimed EPA fuel economy with the mileage per gallon we measured for 303 cars and trucks for model-years 2000 to 2006. Our selection represents a good cross-section of mainstream, high-volume vehicles. We looked at city, highway, and overall mpg.

Highlights of our study:

• Shortfalls in mpg occurred in 90 percent of vehicles we tested and included most makes and models.

• The largest discrepancy between claimed and actual mpg involved city driving. Some models we tested fell short of claimed city mpg by 35 to 50 percent.

• Hybrids, whose selling point is fuel thriftiness, had some of the biggest disparities, with fuel economy averaging 19 mpg below the EPA city rating.

• The EPA ratings are the result of 1970s-era test assumptions that don't account for how people drive today. Automakers also test prototype vehicles that can yield better mileage than a consumer could get.

• Despite federal certification, it appears that U.S. vehicle fleets, all cars and light trucks produced in one model year, don't meet government fuel-economy standards. For example, fleet mpg for 2003-model-year vehicles we studied was overstated by 30 percent.

[redshift]

Stop-and-Go numbers in my city, are higher than 90% of other citys, because my city MAKES YOU STOP at EVERY light..

It's a rip off.


M

[Allan]

QUOTE (TimT @ Sep 18 2005, 04:42 AM)

It was badged 8-6-4 or something, it didnt work that well

Mid '70's Eldorado I think. I had a friend that had one.

It sucked...

I'm sure the technology is better now though. (IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif)

[bd1308]

how does the system work? are the fuel injectors shut off, both injectors and plugs....
are cylinders shut off in diagonal order, or a different order depending on firing order and setup....

[bd1308]

QUOTE (redshift @ Sep 18 2005, 12:24 PM)

Stop-and-Go numbers in my city, are higher than 90% of other citys, because my city MAKES YOU STOP at EVERY light.. It's a rip off. M

here, the lights are only suggestion....

red means stop if you want
yellow means hello
and green means go really fast through the light.

[snflupigus]

Imagine, displacement on demand, variable compression, and variable valve timing all in one, then add lithium ion regen braking hybrid with a tiny fuel cell just in case you run out of gas!!!! 1000mpg LOL!!!

(IMG:http://www.914world.com/bbs2/html/emoticons/screwy.gif)

http://www.saabnet.com/tsn/press/000318.html

I've got a much better idea.... spend some money to make gas F'n CHEAPER AGAIN by building some damn refineries in the US and find an environmentally friendly way tapping Alaska!!!! (which i will argue COULD be done). I also argue that the increased productivity and freedom of travel and shipping in the US would increase GDP and tax revenue and that increase could go right back into the whole environmentally friendly ideas.

[waiting for all the hippy tree huggers to now attack me]

LOL