C7 General Discussion General C7 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

C7 weight, can't they reduce it more?

Old 01-18-2017, 10:07 AM
  #41  
TXshaggy
Drifting
 
TXshaggy's Avatar
 
Member Since: May 2013
Location: Texas Hill Country Texas
Posts: 1,972
Received 1,093 Likes on 608 Posts
Default

Surprised that no one has mentioned how much smaller the C6 was than either the C5/7...
Old 01-18-2017, 10:12 AM
  #42  
Patman
Race Director
 
Patman's Avatar
 
Member Since: May 2001
Location: Guelph, Ontario
Posts: 15,063
Received 1,917 Likes on 1,190 Posts

Default

Originally Posted by Foosh
Yep, weight gain is consumer induced.

It's a classic case of, "we have met the enemy, and it is us." Corvettes won't sell in the necessary numbers without all the modern creature comforts offered by any other modern vehicle these days. Every generation of everything is getting fatter and fatter, with rare exceptions, even when using the lightest materials possible, such as going to aluminum instead of steel.

Perfect example, just look at the small BMWs these days, you'd think a 2 series BMW would be super light given it's small size but an M2 still weighs 3500 pounds! The old BMW 2002s of the late 60s/early 70s were lightweights, in the 2000-2200 pound range! Both cars are roughly the same size, but there is just so much technology added these days. Even the 5.0 Mustangs have gotten portly, my 87 Mustang GT weighed around 3100 pounds but the latest ones are around 3700. At least we can be thankful the Corvette isn't that heavy!
Old 01-18-2017, 11:44 AM
  #43  
Roadrogue
Burning Brakes
 
Roadrogue's Avatar
 
Member Since: Jan 2015
Location: Pittsburgh PA
Posts: 780
Received 93 Likes on 74 Posts
Default

ESE cf wheels with lighter tires is 56 pounds of rotational mass! $8k from Ben at WeaponX. Seems like a good deal to me, but my wife might feel otherwise. I'm surprised more of the rich guys here haven't done this but it seems more power is more popular.

https://www.corvetteforum.com/forums...on-wheels.html

Last edited by Roadrogue; 01-18-2017 at 11:44 AM.
Old 01-18-2017, 12:03 PM
  #44  
Steve_R
Team Owner

Support Corvetteforum!
 
Steve_R's Avatar
 
Member Since: Mar 2012
Location: Anger Island
Posts: 45,940
Received 3,288 Likes on 1,399 Posts
St. Jude Donor '12-'13-'14-'15-'16-'17

Default

The vast majority of C7 buyers - which is GM's target market - don't know or care what it weighs. That's the simple truth.
Old 01-18-2017, 12:16 PM
  #45  
JoesC5
Team Owner
 
JoesC5's Avatar
 
Member Since: Sep 1999
Location: Springfield MO
Posts: 41,733
Received 1,699 Likes on 1,213 Posts

Default

CF wheels cost a bunch. How many are willing to pay the additional MSRP of the car(plus possibly have to replace one that is curbed and not covered by warranty)?

In 1997+, the C5 had an optional Magnesium wheel that was lighter than the base aluminum wheel. $3,000 option and not that many takers, A couple of years later, GM dropped the price to $2,000, but still very few wanted that more expensive option.

GM is better off offering the Corvette with a cheaper aluminum wheel as base(with a lower MSRP) and let the ballers pay for carbon fiber wheels from the aftermarket.

Absolutely no point in running up the cost for ALL buyers just because a few want to save a little weight.

I said the same thing when this forum was discussing adding "racing" seats as standard equipment, to the C7, across the board. I said to keep a cheaper standard seat and offer a more expensive "racing" seat for the few that wanted it. My point was that there was no need to saddle the higher cost of a "racing" seat to those that don't want it, by making it standard across the board.

And that is exactly what GM did.
The following users liked this post:
ptran00 (09-08-2017)
Old 01-18-2017, 12:43 PM
  #46  
Suns_PSD
Le Mans Master
 
Suns_PSD's Avatar
 
Member Since: Oct 2012
Location: Texas
Posts: 8,434
Received 408 Likes on 301 Posts
Default

GM should make a real Z06 with an NA DI 7.0 engine, manual seats with heaters only.

Very light 18" wheels all around with proper non RF tires.
2 piece iron rotors stock.
No AFM, CF torque tube.
A Transmission and rear gears that is geared to top out at about 180 mph, there will be a fuel surcharge on this car. It will be much faster however with proper gearing.
No auto trans.
A track car that can still be driven on the street but that is not so luxurious.
A fixed wing in the back.
The following users liked this post:
juanvaldez (01-18-2017)
Old 01-18-2017, 12:59 PM
  #47  
iclick
Melting Slicks

 
iclick's Avatar
 
Member Since: Mar 2013
Location: Baton Rouge LA
Posts: 3,104
Received 618 Likes on 420 Posts

Default

Originally Posted by Ernest_T
^^^ I agree, the only way to reduce weight is get rid of things like electric windows and seats.
The electric window mechanism may weight less than a manual setup, although manual seats would likely not. Decades ago some with racing aspirations would order a car with electric windows as a weight-saving measure, but I don't know how that would translate on a current model.
Old 01-18-2017, 01:01 PM
  #48  
juanvaldez
Team Owner
 
juanvaldez's Avatar
 
Member Since: Sep 2014
Posts: 26,430
Received 493 Likes on 364 Posts
Default

I wonder how much AC adds?
Old 01-18-2017, 02:43 PM
  #49  
jimmyb
Race Director
 
jimmyb's Avatar
 
Member Since: Jan 2005
Location: NC
Posts: 13,934
Received 4,248 Likes on 2,023 Posts

Default

Originally Posted by Steve_R
The vast majority of C7 buyers - which is GM's target market - don't know or care what it weighs. That's the simple truth.
Exactly. The C6 forum was LITTERED, FOR YEARS, about the crappy quality of the materials (especially those ridiculous seats, with the flop forward backs). The C7 addressed what we OWNERS complained about, there was no doubt (in my mind) the car was going to be heavier than the C6.

I love these guys begging for a lightweight "option delete" car. Literally NO ONE buys these cars (look how long it took to sell all the Z/28's and how heavily they were discounted). Now, if GM wants to make a GT3RS type C7 and do it like Porsche does, i.e.: Announce the quantity to be produced on the front end and pre-sell it, then that makes sense. Then the REAL track guys could get the car they want.

Jimmy
Old 01-18-2017, 03:05 PM
  #50  
Kent1999
Le Mans Master
 
Kent1999's Avatar
 
Member Since: Aug 2000
Location: Las Vegas NV
Posts: 6,483
Received 1,651 Likes on 825 Posts

Default

Originally Posted by Suns_PSD
GM should make a real Z06 with an NA DI 7.0 engine, manual seats with heaters only.

Very light 18" wheels all around with proper non RF tires.
2 piece iron rotors stock.
No AFM, CF torque tube.
A Transmission and rear gears that is geared to top out at about 180 mph, there will be a fuel surcharge on this car. It will be much faster however with proper gearing.
No auto trans.
A track car that can still be driven on the street but that is not so luxurious.
A fixed wing in the back.

I hear you, but there's no market for that, at least none anywhere near the size needed to cover the costs and bad PR.

GM learned its lesson with the C6 Z06/ZR1 -- remember the constant b*tching and whining from people (including many on this forum) that the Z06/ZR1 was NOT available with a removable targa roof, or a convertible, and automatic trans? "If I want it, why can't GM build it?!?!? Waaaaaa!"

Majority want the 'raciest' model for the bragging rights, but insist on every comfort and convenience option known to man included as well, extra weight be damned. "Its a track special, so it's de-contented to make it lighter" falls on deaf ears of the masses. "I can't believe my Z06 Club Sport cost me $90,000 yet doesn't have better cup holders, a better sound system, or finer leather on the seats!!! GM is cheap crap!!" will be the whine. GM doesn't need to spend extra time and money just to see that garbage on its enthusiast webs.

If you want to blame someone for a lack of a 'track special', look no further than here.

Last edited by Kent1999; 01-18-2017 at 03:08 PM.
The following users liked this post:
jimmyb (01-18-2017)
Old 01-18-2017, 03:10 PM
  #51  
raff
Burning Brakes
 
raff's Avatar
 
Member Since: Nov 2011
Location: Valdosta GA
Posts: 1,145
Received 126 Likes on 98 Posts
St. Jude Donor '15-'16-'17-‘18-'19-'20-'21-'22

Default

Originally Posted by juanvaldez
I'm fixin' to build a car that will scorch a Corvette. Little 2.3l (almost) stock Ford motor, no power anything, no radio, no heater, no windshield wipers, no windshield! Basic design goes back to the early '60. The car will be street legal, about 200 hp, 1,100 lbs without driver. It is the Birkin version of the Lotus 7 and comes from Africa. I should have it done by summer.

I think a Z06 has a hp/weight ratio with driver of around 3700/650. Birkin 1280/200 = 6.4.
Not quite -- with the aerodynamics of a brick, your Birkin's top speed might be 120 - 130 mph ??
The following users liked this post:
juanvaldez (01-18-2017)
Old 01-18-2017, 03:21 PM
  #52  
juanvaldez
Team Owner
 
juanvaldez's Avatar
 
Member Since: Sep 2014
Posts: 26,430
Received 493 Likes on 364 Posts
Default

Originally Posted by raff
Not quite -- with the aerodynamics of a brick, your Birkin's top speed might be 120 - 130 mph ??
Yep, it does have the aerodynamic of a brick, tops out around 140.
Old 01-18-2017, 03:38 PM
  #53  
Kent1999
Le Mans Master
 
Kent1999's Avatar
 
Member Since: Aug 2000
Location: Las Vegas NV
Posts: 6,483
Received 1,651 Likes on 825 Posts

Default

Originally Posted by juanvaldez
I'm fixin' to build a car that will scorch a Corvette. Little 2.3l (almost) stock Ford motor, no power anything, no radio, no heater, no windshield wipers, no windshield! Basic design goes back to the early '60. The car will be street legal, about 200 hp, 1,100 lbs without driver. It is the Birkin version of the Lotus 7 and comes from Africa. I should have it done by summer.

I think a Z06 has a hp/weight ratio with driver of around 3700/650. Birkin 1280/200 = 6.4.
Building a car that is faster than a C7 Z06 in 0-60 and 1/4 mile is the easiest thing in the world.

Take any old crappy 1960's era car, gut it, remove doors/trunk/hood/fenders/glass, throw in a blown big block and slicks on the back and you are there, for many many thousands less. It's ugly as home made sin, will get single digit MPG, won't last anywhere near 100,000 miles, will be scared of any corner and won't be fun to drive, but it *will* be fast in a straight line if that is the end-all be-all for you and nothing else matters.

However, building a complete car that has a near 200MPH top speed, low AND high speed handling, comfort, decent mileage, and modern safety features, and you're not going to get anywhere near the C7's level of sophistication for less cost.

If power-to-weight and absolutely no comfort features is your thing, you might consider buying any new japanese liter-class sportbike. 500lbs/150hp = 3.3, all for less than $20,000 including a 1 year warranty.

Not saying the Birkin won't be fun (I don't care for the L7's looks, but they *are* fun), but to make a blanket statement that it will 'scorch the Corvette' is kind of overstating it, wouldn't you agree?
The following users liked this post:
Me Hole (08-23-2020)
Old 01-18-2017, 03:38 PM
  #54  
chas70
Racer
 
chas70's Avatar
 
Member Since: May 2014
Posts: 339
Received 40 Likes on 22 Posts
Default

Keep in mind that the extra weight keeps it glued to the road better
Old 01-18-2017, 03:40 PM
  #55  
TGO
Safety Car
 
TGO's Avatar
 
Member Since: Oct 2013
Location: Staten Island NY
Posts: 3,716
Received 13 Likes on 12 Posts
Default

Originally Posted by LT1 Z51
They had less content (both electronic and safety)

All that extra crash structure, airbags, and wiring makes cars heavy.

This isn't rocket science guys. Little stuff adds up to a lot of weight. One 18 gage wire isn't that heavy, 1000 of them, that's a few pounds.
Thank you captain obvious. We covered that already.
Old 01-18-2017, 03:47 PM
  #56  
chas70
Racer
 
chas70's Avatar
 
Member Since: May 2014
Posts: 339
Received 40 Likes on 22 Posts
Default

Originally Posted by TGO
Thank you captain obvious. We covered that already.
now do you feel better? Jeez
Old 01-18-2017, 03:49 PM
  #57  
DickieDoo
Drifting
 
DickieDoo's Avatar
 
Member Since: Aug 2015
Location: Maple Ontario
Posts: 1,440
Received 181 Likes on 159 Posts
Default

Originally Posted by cheapthrills
Wheels wheels wheels, that's the best place for them to lose weight




Then get the folks at DSC sport to tune the controller for the light weight wheels.. That would be an amazing combo.
Exactly what i said... i would estimate a savings in total of about 125-150 lbs and most of that is off of rotating mass. SO the wheels and tires are the best place to begin and then to the torque tub and AFM. And it can actually be done.

Get notified of new replies

To C7 weight, can't they reduce it more?

Old 01-18-2017, 03:50 PM
  #58  
449er
Race Director
 
449er's Avatar
 
Member Since: Apr 2016
Location: Pittsburgh
Posts: 10,637
Received 4,685 Likes on 2,984 Posts
2023 C6 of the Year Finalist - Unmodified
2022 C6 of the Year Finalist - Unmodified
2021 C6 of the Year Finalist - Unmodified
Default

Originally Posted by juanvaldez
I'm fixin' to build a car that will scorch a Corvette. Little 2.3l (almost) stock Ford motor, no power anything, no radio, no heater, no windshield wipers, no windshield! Basic design goes back to the early '60. The car will be street legal, about 200 hp, 1,100 lbs without driver. It is the Birkin version of the Lotus 7 and comes from Africa. I should have it done by summer.

I think a Z06 has a hp/weight ratio with driver of around 3700/650. Birkin 1280/200 = 6.4.
The car that you describe above would NOT be street legal in Pa; no windshield & no wipers = no inspection sticker
Old 01-18-2017, 03:50 PM
  #59  
DickieDoo
Drifting
 
DickieDoo's Avatar
 
Member Since: Aug 2015
Location: Maple Ontario
Posts: 1,440
Received 181 Likes on 159 Posts
Default

Originally Posted by chas70
Keep in mind that the extra weight keeps it glued to the road better
It's called "road hugging weight" as Pontiac used to call it as i recall !
Old 01-18-2017, 03:52 PM
  #60  
DickieDoo
Drifting
 
DickieDoo's Avatar
 
Member Since: Aug 2015
Location: Maple Ontario
Posts: 1,440
Received 181 Likes on 159 Posts
Default

Originally Posted by raff
Not quite -- with the aerodynamics of a brick, your Birkin's top speed might be 120 - 130 mph ??
I think they call it an Ariel Atom these days...

Thread Tools
Search this Thread
Quick Reply: C7 weight, can't they reduce it more?



All times are GMT -4. The time now is 03:49 PM.