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. (http://www.car-videos.net/tools/speedrpm.asp?Car=Select&Num1=215&Num2=45&Num3=18&AxleRatio=4.05&Ratio1=3.38&Ratio2=1.76&Ratio3=1.18&Ratio4=.89&Ratio5=.70&Ratio6=&Ratio7=&Redline=7000&Increment=500&B1=Recalculate)

(read below the numbers to see why)

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

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

Here is another place that has this calculated.

http://www.cobaltss.net/forums/showthread.php?t=50610&highlight=quaife

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

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) (http://www.chevrolet.com/cobalt/specifications/) 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/product_services/Spec%20Sheets/Transmissions/2006%20Manuals/2006%20F35%20(MU3).pdf

2.2/2.4: 5 Speed Manual Specs
http://media.gm.com/us/powertrain/en/product_services/Spec%20Sheets/Transmissions/2006%20Manuals/2006%20Getrag%20F23Manual%20(M86%20MG3).pdf

2.2/2.4: 4 Speed Auto Specs
http://media.gm.com/us/powertrain/en/product_services/Spec%20Sheets/Transmissions/2006%20Automatics/2006%20Hydra-Matic%204T45%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 :nuts:

Thats calculated for an 8100 rpm redline ;)

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.

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

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 shit load of force to push that thing down.

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?

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 shit

It was straight line.

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

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 shit load of force to push that thing down.

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.

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) (http://www.chevrolet.com/cobalt/specifications/) 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.



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...

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

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

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

Mine maxed at 100 when I wasnt tunes. When my redline was still at 6500 it went to 100.???

Very nice, but this one is more accurate.

Clicky. (http://www.car-videos.net/tools/speedrpm.asp?Car=Select&Num1=215&Num2=45&Num3=18&AxleRatio=4.05&Ratio1=3.38&Ratio2=1.76&Ratio3=1.18&Ratio4=.89&Ratio5=.70&Ratio6=&Ratio7=&Redline=7000&Increment=500&B1=Recalculate)

(read below the numbers to see why)

Perfect!

So with the stock 6500rpm red line, we get this:

Tire Size:
215/45/18

Final Drive Ratio (Axle Ratio of driven wheels):
4.05

Gear Ratios:
1= 3.38
2= 1.76
3= 1.18
4= .89
5= .70

Speed In Gears:
--1---------2----------3----------4----------5---
34.9------67.1------100.0-----132.6-----168.6

0-60 in just 2 gear changes.
1/4 mile run in just 3 gear shifts
(stock SC's turn less than 100mph in the 1/4 and make power right to red line)

Seems Chevy picked the right gears ratios!

wit the 3.0pulley i just got on yesterday(awesome,so happy) 3rd gear at 6500 was maybe like 105, little past 100...

Seems Chevy picked the right gears ratios!
All except first. It should go to about 40-45.

wit the 3.0pulley i just got on yesterday(awesome,so happy) 3rd gear at 6500 was maybe like 105, little past 100...
Hate to tell you this, but changing the pulley will not effect your speed like that. You will get there faster, but you have to change the gear ratios, differential or tire/wheel sizes to change the speed at the same RPM.

i know this...im just stating that im not stock, and what my mph was..

I didnt see this calculator in any posts above and its pretty good as its a slider type. Just inpout all the variables (of course Cobalt ones wont be listed as any defaults so it doesnt matter what make/model or tranny type its showing just change data to the correct ratios for gearing and rearend). I like it cause you can see exactly where you wanna shift to drop down into certain rpms using the slider bar. You computer needs Java installed/enabled for this to work.

The Cobalt has a horrible ratio drop (gm really fugged up their 2-4th ratios in this tranny) from 1st into 2nd gear and 1st must have the hell reved out of it at least 7k or more to drop it down to a decent rpm in 2nd for power, where as the shift into 3rd doesnt need anywhere near a redline shift to drop it down to a decent 4000 rpm, but using more like a 6400 shift.

http://www.geocities.com/z_design_studio/transmission.html

does anyone know the gear ratio's of the NA\ss or where i could find them? im a noooob when it comes to transmissions,hopefully i can learn something

Tempted to slap a RPM and MPH logger and hit the limiter in every gear.

Perfect!

So with the stock 6500rpm red line, we get this:

Tire Size:
215/45/18

Final Drive Ratio (Axle Ratio of driven wheels):
4.05

Gear Ratios:
1= 3.38
2= 1.76
3= 1.18
4= .89
5= .70

Speed In Gears:
--1---------2----------3----------4----------5---
34.9------67.1------100.0-----132.6-----168.6

0-60 in just 2 gear changes.
1/4 mile run in just 3 gear shifts
(stock SC's turn less than 100mph in the 1/4 and make power right to red line)

Seems Chevy picked the right gears ratios!

You meant 0-60 in 1 shift and 1/4 mile in 2 shifts.

my tire sizes are different than whoever posted the last tire size. whats the stock size on these cars

does anyone know the gear ratio's of the NA\ss or where i could find them? im a noooob when it comes to transmissions,hopefully i can learn something

2.4 SS/NA
1: 3.58
2: 2.02
3: 1.35
4: .98
5: .81
R: 3.31

Final: 3.94

Stock Tire size: 205/50 R17

my tire sizes are different than whoever posted the last tire size. whats the stock size on these cars

depends on what model you have. easiest way to find out is to run outside and like at the numbers on your tires :thumb:

shit my car felt GREAT at 150