Print 68 comment(s) - last by Maiyr.. on Jan 19 at 5:54 PM

  (Source: The Car Connection)

  (Source: The Car Connection)

  (Source: The Car Connection)
Cadillac's Converj adds some spice to the Volt platform

The Chevrolet Volt has been the talk of the town at General Motors for the past two years. The vehicle was first unveiled as a concept two years ago at the Detroit Auto Show. After over a year and a half of development, GM finally unveiled the production Volt to an anxious public.

The Volt, which is likely to be priced north of $40,000 before applicable government tax credits, can travel forty miles on battery power alone. After the initial 40-mile battery range is depleted, the car turns on its gasoline engine/generator to boost the total driving range to 360 miles.

GM is now looking to spread the wealth by giving one of its more upscale brands a vehicle based on the already impressive Volt platform. The lucky recipient this time around is Cadillac and the car is called the Converj. The Converj uses the same powertrain as the Volt, so the performance and economy ratings of the vehicles should be identical -- the Converj, however, does have a much more attractive exterior design.

Whereas the production Volt is considered by most to be rather plebian in design, the Converj is definitely more dynamic with its low-slung shape. The two-door, four-seat coupe seems to borrow from both the Cadillac Cien Concept from seven years ago and the Cadillac CTS Coupe Concept which was unveiled last year.

This is how Cadillac describes the design of the Converj:

Cadillac’s extended-range electric vehicle (E-REV) concept has a new body style that is an evolution of the brand’s traditional Art and Science design theme. An aggressive, forward-leaning arc profile is the foundation for the sporting stance. And more than a Cadillac in form, Converj is also intended to be a Cadillac in substance, with the premium materials, technology and driving dynamics that are hallmarks of the brand.

In keeping with the concept nature of the vehicle, the Converj features large 21" wheels in the front and slightly larger 22" wheels in the back. An all-glass roof is littered with solar panels which help to power the vehicle's many accessories, while OLEDs are used to light the Converj's instrument panel. The Converj also makes use of LED headlights.

"Vertical lamps are Cadillac signatures and the Converj builds on the brand’s light pipe technology with bolder light emitting diode (LED) and high-intensity discharge elements front and rear," adds Cadillac global design director Clay Dean. "There is also a unique daylight light ‘spear’ at the top of the headlamps."

"It’s a logical extension of our plan to reinvent the automobile," said GM's Bob Lutz. "It clearly shows what a Cadillac electric vehicle could look like, and clearly indicates that global luxury customers can have a car that has both strong design and electric propulsion with a total range of hundreds of anxiety-free miles."

It remains to be seen whether a vehicle like the Converj will end up being in the Cadillac family, but one thing is certain -- if the vehicle does make it to production, it will be priced much higher than the $40,000+ cost of entry for the Volt.

Comments     Threshold

This article is over a month old, voting and posting comments is disabled

RE: 22's in the rear, heh
By FITCamaro on 1/11/2009 9:58:24 PM , Rating: 2
Putting big wheels on a car doesn't necessarily equal lower mpg. Putting them on a car that they weren't ever meant to be on yes. A car that is capable of handling them, no.

I'd be more worried about your brakes working.

RE: 22's in the rear, heh
By theapparition on 1/12/2009 9:36:48 AM , Rating: 2
Sorry, but it absolutely does make a difference. Increasing the rotational mass and unsprung weight has the unfortunate effect of reducing economy. Even if it is a small difference.

Many throw "cheap" big wheels with tons of chrome that end up weighing twice what the stock wheels weigh.

That's one of the reasons I only run super light wheels from CCW.

RE: 22's in the rear, heh
By FITCamaro on 1/12/2009 11:04:08 AM , Rating: 3
Remember though that larger wheels have to be turned less times to go as far. It would affect city mileage more than highway. Of course that also depends on the design of the wheel.

Yes many buy extremely heavy wheels. But when interested in performance, you might be able to buy a larger wheel thats still lighter than the stock one.

RE: 22's in the rear, heh
By theapparition on 1/12/2009 1:32:04 PM , Rating: 2
Remember though that larger wheels have to be turned less times to go as far.


That only works if the tire diameter is changed, which in most cases isn't. Generally, when people upsize wheels, they use lower profile tires to keep overall diameter the same. You never want to drastically change diameter of the overall tire.

Unless your seriously talking about "Donks", in which case I'll lose complete respect for you as a car guy.

But when interested in performance, you might be able to buy a larger wheel thats still lighter than the stock one.

That's why I specifically mentioned CCW. Larger diameter wheel rim (and wider) yet lighter than the forged stock rims.
BTW, you're completely screwed when it comes to GTO wheel options. They use a 5 x 120mm bolt pattern (same as BMW), but have wierd offsets that makes finding a cheap upgrade virtually impossible. CCW or some of the other high quality brands (HRE, iForged) sell great designs, but be prepared to fork over $$$$.

RE: 22's in the rear, heh
By Jimbo1234 on 1/12/2009 1:53:22 PM , Rating: 2
Correct. This is the idea, but in reverse, with snow tires. You drop the rim size (only a bit, see below) and increase the tire sidewall. The taller sidewall flexes more during cornering, but also reduced the rim damage when you hit a pothole under the slush.

Rims on cars are getting larger and larger every year it seems. However, larger rims are required for larger brakes. And why do we need larger brakes? Well, because cars are getting fatter and fatter.

RE: 22's in the rear, heh
By Jimbo1234 on 1/12/2009 1:54:24 PM , Rating: 2
...reduces... Damn it, where's the edit button?

RE: 22's in the rear, heh
By othercents on 1/12/2009 3:55:47 PM , Rating: 2
Well, because PEOPLE are getting fatter and fatter.

Sorry I had to make a correction for you. :D

Anyways you are both right for the most part. The diameter of my tire/wheel is way less than 22, but that doesn't mean I have better fuel mileage. Also you can get 22s with rubber to weigh less than 10s with rubber at the same diameter.

Larger diameter tire/wheel combo produces better fuel mileage than smaller tire/wheel combo for freeway driving. Heavy large diameter rims produces worse fuel mileage when driving short distances. Electric vehicles also have more torque than gas ones which will offset most of the fuel mileage issue. On average for stop and go traffic the unsprung weight won't make as much of a difference.

The moral of the story. The engineer knows best and if you want it changed go apply for an engineering job. :D

RE: 22's in the rear, heh
By Jimbo1234 on 1/13/2009 3:05:25 PM , Rating: 2
I had the engineering job when I worked for a mining truck OEM. I quit after I got tired of the ISO 9001 BS.

"DailyTech is the best kept secret on the Internet." -- Larry Barber
Related Articles
GM's New Electric Concept Car
January 7, 2007, 4:55 PM

Copyright 2016 DailyTech LLC. - RSS Feed | Advertise | About Us | Ethics | FAQ | Terms, Conditions & Privacy Information | Kristopher Kubicki