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Tom Stephens:Our upcoming programs have aggressive mass targets

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Old Aug 27, 2009 | 08:34 PM
  #31  
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Originally Posted by teal98
No

How much smaller and lighter can they make the car while still allowing for a V8, small back seat, and trunk?

Taking 350 pounds out of today's car without compromising anything seems like an impossible order.
Well, the small block pushrod V8 is about as long as a 4 cyl and not that much wider, so I don't think a car has to be THAT big to package one. Remember, they fit fine in FOX Mustangs, and they are SMALL.

That and the original Camaros seem like they are 30% smaller than the new ones.
Old Aug 27, 2009 | 08:55 PM
  #32  
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Originally Posted by formula79
A 4 cylinder Camaro was done..and failed. At minimum..it would have to be a turbo. While lighter is nice..I think it all has to be done in reason. A car like Camaro already has area's like interior that are cheaped out on to bring it in at a value price. I don't want weight to become such a cost hog it takes away from the rest of the car.
That was 1982, a 2015 4 cyl Camaro would put out as much HP as a 5.0L V8 did in 1982. Maybe the last 4 cyl. failed because of its 0-60 was 12 seconds and it did the 1/4mi. in 20 sec. instead of the number of cylinders it had.

Gas back then was also $1.25 which according to an online inflation calculator that is about the same as $2.70 today. That is what we are currently paying and I don't think a 2.4L SIDI Camaro would sell today. But by 2015 gas should be in the $5 range. I think $4+ is the point that a 200HP 4 cyl. Camaro becomes something people would be interested in.
Old Aug 27, 2009 | 09:12 PM
  #33  
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Originally Posted by Z284ever
Maybe you should consider high mass itself a cost hog, instead of the other way around. High mass escalates the cost of everything. Components, powertrain choices, roof crush, EPA certification costs, you name it.
Any idea why the lowly Camaro gets as standard equipment the motor you need to pay EXTRA for in the CTS and LaCrosse?
Nonsense. The lower cost components are the heavy items because they are sufficiently strong on the basis of the cost/weight metric used. Just compare a truck to a Camaro... which is cheaper to produce?

Originally Posted by Z284ever
Any idea why a $30K Camaro comes with fairly exotic Brembos?
To safely retard the car... just like any performance car, it needs a good brake package.
Old Aug 27, 2009 | 10:30 PM
  #34  
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Originally Posted by Z284ever
Putting aside any weight saving materials, (which the 5th gen is actually pretty intensive in), I can imagine the 6th gen being maybe a half foot shorter, a couple inches narrower, not designed to take 600+ ft/lbs of torque, and not based on a hefty, fullsized sedan, designed for the Holden home market.

Lots of mass saving opportunities there.
Designing for 450 instead of 600 lb ft of torque will help. Do you know that the current car is actually designed for 600?

Shorter and narrower could help a bit, depending on how they get there. The CTS gained a couple of hundred pounds when it got wider, but I don't know how much was from the extra width and how much was from a stouter chassis designed to take an LSA.

Hefty and fullsized seem to be encompassed in the shorter and narrower part. Given that a V6 Commodore is lighter than a V6 LaCrosse and not much heavier than a V6 Malibu, which is midsized, I question how hefty the Commodore actually is. I'd say it's pretty much typical.

Sizewise, you're describing something about the size of an IS350 or 335i. Both of those typically come in at 3600. Add 100-150hp and tq, remove a bit of luxury equipment (most of that stuff doesn't really weigh that much). I think 3650 would be a very good result. 3500 just seems like too much to hope for. Just to be clear, I'm talking about a 6.2 liter V8 model. As I've mentioned before, I would expect 4 and 6 cyl models to be more highly optimized for those powertrains than is the case today, so they should be able to come in with a greater reduction. I'd be disappointed if that doesn't turn out to be the case.
Old Aug 27, 2009 | 11:06 PM
  #35  
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Originally Posted by teal98
Designing for 450 instead of 600 lb ft of torque will help. Do you know that the current car is actually designed for 600?
I can't swear on it, but just what I've heard, maybe even more.
Old Aug 28, 2009 | 01:02 AM
  #36  
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Originally Posted by Z284ever
I can't swear on it, but just what I've heard, maybe even more.
600 seemed like a good idea in 2007....
Old Aug 28, 2009 | 01:06 AM
  #37  
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Originally Posted by teal98
600 seemed like a good idea in 2007....
Actually, 600...................in a convertible.
Old Aug 28, 2009 | 03:30 AM
  #38  
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Originally Posted by WERM
Well, the small block pushrod V8 is about as long as a 4 cyl and not that much wider, so I don't think a car has to be THAT big to package one. Remember, they fit fine in FOX Mustangs, and they are SMALL.
Okay. The Fox Mustang does not meet modern crash standards and came with, what, 240hp in the top model (unless you count the '04 model as a Fox)?

A small block has larger bores than 4 cyls and the V8 engine has an offset bank. So it is bigger. Maybe not THAT big, but about that big....
Old Aug 28, 2009 | 09:53 AM
  #39  
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Could the alpha Camaro make due with 17 or 18 inch wheels as opposed to the 20+ inchers that get thrown on just about every performance car coming out these days? Probably more dependent on styling than anything else. Smaller wheels would save some weight and probably help out handling. There is a point of diminishing returns when wheel diameter is increased to excess.
Old Aug 28, 2009 | 10:01 AM
  #40  
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Originally Posted by Sixer-Bird
Could the alpha Camaro make due with 17 or 18 inch wheels as opposed to the 20+ inchers that get thrown on just about every performance car coming out these days? Probably more dependent on styling than anything else. Smaller wheels would save some weight and probably help out handling. There is a point of diminishing returns when wheel diameter is increased to excess.
I can tell you that on the 5th gen, the 20" wheels were more driven by GM Design than by engineering.
Old Aug 28, 2009 | 10:07 AM
  #41  
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Originally Posted by Z284ever
I can tell you that on the 5th gen, the 20" wheels were more driven by GM Design than by engineering.

In 20 years, 20+ inch wheels will be viewed as the tail fins of this generation. It amazes me that they have become so commonplace.
Old Aug 28, 2009 | 10:10 AM
  #42  
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Originally Posted by teal98
remove a bit of luxury equipment (most of that stuff doesn't really weigh that much).
i don't buy that at all. i bet stuff like the seats add a lot of weight.
Old Aug 28, 2009 | 03:22 PM
  #43  
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Originally Posted by 97z28/m6
i don't buy that at all. i bet stuff like the seats add a lot of weight.
I'd bet a 27 way, memory power seat with heat, cooling and massage is pretty hefty.
Old Aug 28, 2009 | 04:19 PM
  #44  
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Originally Posted by 97z28/m6
i don't buy that at all. i bet stuff like the seats add a lot of weight.
Two things:

1. I said "most of that stuff".

2. Betting that "stuff like the seats" they add a lot of weight is not a basis for discussion until we define "a lot of weight" and until you define what stuff you're comparing "like the seats" to.


In any case, it doesn't really matter to the point.
Old Aug 28, 2009 | 04:24 PM
  #45  
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Originally Posted by Z284ever
I'd bet a 27 way, memory power seat with heat, cooling and massage is pretty hefty.
Yeah, and which car that we're talking about has that?



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