i took some info from a member here added it to an old website i had and figured id post it up here to help out other people

gear ratios cobalt ss/sc 5 speed

first ........... 3.38
second .......... 1.76
third ........... 1.18
forth ........... 0.89
fifth ........... 0.7

reverse ......... 3.17

final ........... 4.05

plug those into this calculator
http://www.f-body.org/gears/

and you get this at 7000rpms....
1st gear top speed 39mph
2nd gear top speed 75mph
3rd gear top speed 112mph
4th gear top speed 148mph
5th gear top speed 188mph

all assuming you have the power to get there. have fun with the web site you can change tire size and rpm to help get an idea of certain speeds at each rpm level

 

so the cobalt ss/sc has 4.05 gears

 

Very nice, but this one is more accurate.

Clicky.

(read below the numbers to see why)

 

that doesn't sound right at all by a good 10-20 km's/h

 

Here is another place that has this calculated.

https://www.cobaltss.net/forums/show...ghlight=quaife

 

Those numbers are WAY off. What tire size did you use.

 

Off chevy.com;

SS Supercharged- specific five-speed manual with overdrive
MM5

Gear ratios
First Gear 4.05 (29.5, S2 32.3)(f-body site S2 33)MPH
Second Gear 2.02 (59.1, S2 64.7)(f-body site S2 67)MPH
Third Gear 1.35 (88.5, S2 96.8)(f-body site S2 100)MPH
Fourth Gear .98 (121.9, S2 133.3)(f-body site S2 138)MPH
Fifth Gear .69 (173.1, S2 189.4)(f-body site S2 196)MPH
Reverse 3.31
Final drive ratio 3.94
(the f-body site speeds seem more accurate to me based on my bro's SS/SC, though he does have 225/40/18's)

This is just copy pasted from the chevy site (click Transmission on the far right) to show the difference in ratios between the different trims.

Type Hydra-Matic four-speed automatic with overdrive
Five-speed manual with overdrive
SS Supercharged- specific five-speed manual with overdrive
RPO MN4 MM5 MM5
Gear ratios
First gear
2.96
3.58
4.05
Second gear
1.62
2.02
2.02
Third gear
1.00
1.35
1.35
Fourth gear
0.68
0.98
0.98
Fifth gear
—
0.81
0.69
Reverse
2.14
3.31
3.31
Final drive ratios
3.63
3.94
3.94

I don't know if the 07's have different gear ratios or if the sites wrong or what, just thought I'd share.

 

^^^ Techs have stated the Chevy site is wrong. Here is the accurate numbers direct from GM in pdf format.

2.0: 5 Speed Manual Specs
http://media.gm.com/us/powertrain/en...35%20(MU3).pdf

2.2/2.4: 5 Speed Manual Specs
http://media.gm.com/us/powertrain/en...M86%20MG3).pdf

2.2/2.4: 4 Speed Auto Specs
http://media.gm.com/us/powertrain/en...45%20(MN5).pdf

 

i used the correct numbers and i used the calculaor and my tires size on my car... it does not account for tire stretching at speed or hp or wind resistance... put your car on a dyno and run it all the way to redline and see.... technically you would have you measure your car exactly and then see for yourself, because honestly there are too many variables. but hey its fun to do things like this and see what could possibly be what the car can do.

 

OMG!!! I did the calculations for what my setup will be like in each gear!

1st gear = 45 mph
2nd gear = 87 mph
3rd gear = 129 mph
4th gear = 171 mph
5th gear = 218 MPH

Thats calculated for an 8100 rpm redline

 

At extreme speeds the tires wouldn't stretch so much as flatten out because of the massive down force on the car. Why do you think the owners manual says to raise the tire pressure to 35psi for extended driving over 100mph.

 

thats funny cause my tires say deflate to no more than 30psi when driving over 100mph. i guess diff tires react differently.

honestly do you think this car makes any downforce with that silly wing or is it just for show?

 

None of these are correct, assuming 7000rpm redline
1 - 37
2 - 73
3 - 107
4- 143
5- 182

and no the stock wing is just ugly, it serves no functional purpose

 

Hmm, thats wierd, cause when I looked in the rear view at a 145 mph the wing was bowing down as if being pushed downward by some strange magical force. I pushed on my wing, and it takes a **** load of force to push that thing down.

 

I don't think so. I would talk to a tire professional about that before attempting.

 

mine flaps in the breeze at 60mph, other than getting in my way of my rear view its not really serving a point

Assuming you even have a valid point about the rear wing and it is making downforce, guess what happens to the front when you add rear downforce?

You get front end lift even worse than what you would without it, so unless you have increased your front downforce its pointless to add it in the rear because your taking away the aerodynamic balance of the car, also having higher rear downforce than front will increase understeer which is common in a front drive car anyway

So if you want to add downforce somewhere do it in the front

 

Since GM did testing a at Nuremberg with the SS/SC, I would assume that they balanced the aero package pretty good. My car felt very stable at 125mph with the stock high rise spoiler.

 

were you turning at 125mph or were you going straight?

the front air dam in these cars isnt worth a damn, flimsy ****

 

It was straight line.

The rear spoiler is pretty flimsy also, but I have heard it does make a difference.

 

LMFAOOOOOOOOOOO

the aerodynamics are actually really well done to keep our car on the ground for the paperweight it is. Try driving any other 2500 lbs car at 125+ im sure you'll see the point....especially around a curve.

 

The 2007 with the recarro package has 4.04 gears...

1st=30
2nd=60
3rd=100
4th=132

and i dont know what 5th gear is.. never redlined 5th.. all the other ones are my experience in my car...

 

Ive taken a turn at 120 in this car and I was planted to the ground! "No understeering because of the wing" come on. These car handle quite well at those speeds. And even tho you think the wing is ugly, it does serve a purpose. The car is aerodynamically stable, any "front end" lift you may have at those speeds are compensated by the front end down force you already have with the cars aerodynamic design.
When they plant a wing on the car they dont just say "ok" now thats the supercharged cobalts wing. They do studies and wind tunnel tests on the it to make sure that kind of thing doesnt happen.

 

no, what they say is "this looks like a good wing for a tuner car." it flows with the color matched seats, big wheels, lip kit and blower.

your guys' gear ratios dont' look that different from mine until you get to 3rd-5th gear. now i don't understand why they say f23's have longer gears??

 

The only people who have problems with true form and function wings, such as the ss/sc, evo or sti, are the big old domestic guys that think the mullet is a gift from god.

 

how are ppl sayin 3rd gear maxes at 100mph, thats way off, i think it got to like 112-113 or so when i was racing my buddies