What's the HP to Weight Ratio of the STOCK 2.4L Cobalt SS? And then whats the HP to Weight Ratio of some of the other cars that seemingly are attracted by the SS "magnet" (ie Mustangs, Chargers, and Japanese imports)?

 

well the car weighs like 2950lbs and stock crank hp is like 172 and whp is like 140-145 so divide it up.

ryan.

 

Uh, you cannot determine this by a random calculation. Different options make a HUGE HUGE HUGE difference in weight. You can easily have two "stock" 2.4 SS's that are 500-700 pounds off from each other, that is a very significant difference. Go to a truck stop or other location with scales and weigh your car with you in it.

Also, you need to dyno your own car. whp also fluctuates greatly model to model. When I dyno'd my SS/SC with just an intake, I got 217whp while another guy in our group with stage 2 only got 10whp more. So it varies. You'll have some cars make a LOT more than expected, while others make less than expected.

The BEST thing to do is find out the specific numbers for your car. If that's not possible, try and find out what the heaviest possible 2.4 would weigh (that'd be with heated leather, pioneer system, sunroof, and 6-CD changer off the top of my head). When trying to guesstimate what another car has, try and assume the highest probable hp number with the lightest weight. Then you'll likely never underestimate anyone.

 

Do it right, do it once. Well put alleycat58.

 

17.1 lb. per hp = cobalt ss 2.4
9.4 lb. per hp = ls2 gto

 

i mean wouldnt that add up is it really hard i dont know if theres like parameters or anything else you have to figure into the equation.

ryan.

 

If you want a rough number to compare your car vs. other companies' then use the number that celicacobalt stated. Although I'm not entirely sure why an ls2 gto would make the list of a comparable car in the Cobalt's class, but whatever.

 

Cobalt ss= 1hp to every 17 lbs of car
Cobalt SS/SC=1hp to every 14.5 lbs of car
GTO = 1 hp to every 9 lbs of car

we would need like 332 hp to be on par w/ the 400 hp GTO If our HP and Torqe curves were similar in Scale assuming transmissions had same % power Loss

 

well just add a turbo and sc and **** and youl be set.

ryan.

 

Sounds expensive

 

i think i'm at about 10 lbs. per hp right now.

 

Sorry but no Cobalt weighs more then 500lbs more then any other.

Unless you have some huge monster sounds system!

My 2dr 5 5 speed weighed 2840/173 =16.4lbs per hp

My 4 dr auto weighs 2925/173= 16.9

 

my 2 door w/ an auto weighs 2882 lol finally got around to checking that door sicker

 

Has anyone noticed that the Chevrolet site now shows the cobalts coupes weight at 2,681 lbs now? It used to be listed as something like 2,991 lbs.(I can't remember exactly). Does anyone know why they changed it?

http://www.chevrolet.com/cobalt/specifications/ (you have to click on the capacites tab)

 

they prolly are ~2700 lbs sock mine has almost every option and weighs 2882 check your door sticker for your cars curb weight its on the drivers side door.

 

turbo and supercharger hmmm

lol yea i'm turboing my supercharger.... wait what?

 

just cause it was wrong. I have made tons of posts trying to correct people that think the Cobalt weighs so much.

GM Canadas site has always had the right info.

 

The U.S. site is pretty conservative compared to the Canadian site. Canada accounts for the added weight as you add features, which is nice.

Weights listed on GM sites. Base Curb weights:

U.S.
Non specific model = 2,681 lbs.(est.)

Canada
LS = 2,730 lbs.
LT = 2,742 lbs.
SS N/A = 2,815 lbs.
SS S/C = 2925

I would think the U.S. estimated number would fall somewhere in the middle of the models sold...somewhere between 2,730 and 2,742.

Using the US estimated weight will give you the best Power/Weight ratio if you want to feel good. Nothing beats weighing it on a scale if you have the opportunity.

 

IRL = 11.3
E55 = 7.22
Mark VII = 4.71

 

I have my own theories and here are the formulas:

*pending pics as we speak*





Most will just stick to the Simple Math. The larger the number you create the better the car is at straight line acceleration.


Through this Math Formula the Cars rank on the following Complex Car Factoid (CCF)

Cobalt SS/NA: 0.357 (357)

Cobalt SS/SC: 0.453 (453)





As you can see this formula needs help on the GF equation. The Equation should actually be X-GF= TQ (Transmission Quotient) or something like that. It's obviously complicated.

 

hold on now, hold on. This is new too me....................... ricers can do math???