Will the Cobalt SS/SC have a governer? Someone want to find out? Not talking about the rev limiter either. :)

Did the Ion RL have a governer?

someone said 145, but that's just hear-say, no definite answer yet to my knowledge.

From what I heard there is no governer, instead they have Z rated tires that go up to 143 mph. Honestly I have no clue whats on the actual production model, have to wait for someone with an SS S/c to tell ya.

Does my car have a governer?

Nice photoshop!

Well usually most new cars are suppose to have that in their car now, but if you change the ECU or PCM, then that takes care of the issue. The Z rated tires are just there in case you want to take your car that high, but for our cars stock it cuts off at around 149 mph or so.......

Well usually most new cars are suppose to have that in their car now, but if you change the ECU or PCM, then that takes care of the issue. The Z rated tires are just there in case you want to take your car that high, but for our cars stock it cuts off at around 149 mph or so.......

I believe we run outta gear before anything else. I know there is a pic up at the RedlineForums that has someone's speedo at around 130ish and the tach is at 6000ish in 5th gear. So I would assume that if it is limited, it is REAL close to the tranny limit for it.

tires dont matter the Z24 came with H rated tires and topped 108mph

lol, my bald POS tires took me to 115 in mine.... btw, where do i find out about these "-" rated tires?.. i'd just like to read up on it, thats all..

and to answer your question, i say yes, it has to IMO... im guessing in the 140's... :confused:

Almost any tire site/store will have something with all the speed ratings explained. I almost positive the TireRack.com has it posted somewhere.

Almost any tire site/store will have something with all the speed ratings explained. I almost positive the TireRack.com has it posted somewhere.

kool, ill look into it, thanks

I have heard it was a 146

tires dont matter the Z24 came with H rated tires and topped 108mph

Actually it does matter, because why would you want to go over the speed limit for the design of the tire, and risk blowing a tire at that high of speed? If you go and ask any tire shop, if it matters or not on what is rated on the tires, I'm sure that they would tell you how important it is to go by what speed is recomended by the rate. There is a reason why they have rated tires.......

Actually it does matter, because why would you want to go over the speed limit for the design of the tire, and risk blowing a tire at that high of speed? If you go and ask any tire shop, if it matters or not on what is rated on the tires, I'm sure that they would tell you how important it is to go by what speed is recomended by the rate. There is a reason why they have rated tires.......

Yea really man, and having a tire go out because of too much speed is NOTHING like having a flat at 60. The tire basically explodes, taking alot of the fender with it, and I don't even have to tell you what controling the car would be like at 100+ mph with an explosive blow-out.

When I read in the magazines that the Cobalt ss/sc had Z rated I was skeptical. I was lucky enough to go see one at the courtesy Chevrolet dealership in Phoenix Arizona and it didn’t have the “Z” rated ones that they advertised. They are perils but they are “w” rated which is even better compared to this chart I found which could be wrong but here you guys go.
Q = 99 MPH, 160km/h
S = 112 MPH, 180km/h
T = 118 MPH, 190km/h
U = 124 MPH, 200km/h
H = 130 MPH, 210km/h
V = 149 MPH, 240km/h
Z = 149 MPH, 240km/h and over
W = 168 MPH, 270km/h
Y = 186 MPH, 300km/h
-And on a side note my Cobalt ss/sc has still not been ordered and here it is March 9th WTF GM?

My Ion Redline has ZR rated tires. 186 I believe. The ZR rating can be applied to any tire that exceeds 149mph. That's why your chart says Z = 149 MPH, 240km/h and over. In the literature for the car, it states the top speed for the tires is 186, maybe it says 168, I'll try to check at lunch.

The official word from GM is that the Cobalt SS has a 143 MPH Top Speed and it is NOT electronically limited (governed).

Chevrolet is also notorious for under-rating its high performance cars true abilities.

Yeah Z, Ive heard the 143...
Why cant it go any faster?? Is the tranny topped out??? If so then that sux!!!
I've also heard that its drag limited, what does that mean, I don't think I fully understand. Does it just mean the aerodynamics??? Like how it cant go faster cause how much the air/wind pressure pushes against it???

Hopefully after upgrades it will at least hit 150+mph!!!
I just wanna do that for braggin rights... 150+mph in a 4 cyl is just cool to me! :D

Yeah Z, Ive heard the 143...
Why cant it go any faster?? Is the tranny topped out??? If so then that sux!!!
I've also heard that its drag limited, what does that mean, I don't think I fully understand. Does it just mean the aerodynamics??? Like how it cant go faster cause how much the air/wind pressure pushes against it???

Hopefully after upgrades it will at least hit 150+mph!!!
I just wanna do that for braggin rights... 150+mph in a 4 cyl is just cool to me! :D

Somone has a pic of their Redline going 135 with about 600 rpms or so to go on 5th gear. I would guess its gear limited by that, or both. 140+ mph is faster than you're ever going to go on most race tracks, unless it's a plain long oval, and you're never gonna see it on the 1/4 mi track in this car. So short gearing is better to me. If it was geared too tall it would fall out of the supercharger's peak power with every shift.

Drag limited means that the car's horsepower is insufficient to push the car through the air any faster. Easy example, if you're doing 100mph, then you need a certain part of your power push through the wind and keep the same speed up. As the speeds increase, so does the pressure on the car, and the power required to keep steady speed. Let alone the power required to increase speed even more. That's one good reason why SUV's are hard to get going over 100. AVERAGE Suv's that is. Most have such a force to push at 100+ mph that you have to floor it just to keep speed.

Using some simple math and the figures listed below it’s easy to calculate that an RPM limited top speed for the Cobalt SS is just over 154 MPH so with a few mod’s this top speed could be attainable before the rev-limiter activates.

1. Perilli 215/45R-18 Tire have a 812 revolution per mile or a diameter of almost exactly 6.5’
2. Final Drive Ratio of 4.05
3. 5th Gear Ratio of 0.70
4. Redline is 6,500 RPM
5. 5,280 ft per mile.

The only thing that I was not able to calculate in was tire growth at high-speed but with this size tire it should be minimal and most likely allow for only 1-2 more MPH, I am also assuming new tires as this figure will be reduces slightly as the tires wear and overall diameter is reduced.

To get another 11 MPH out of this car should take in the neighborhood of 40-45 more ponies (estimated) based on the cars horsepower-to-weight ratio and coefficient-of-drag.
At high speeds it takes a lot of horsepower gain to get small MPH improvements.

Well thats cool. Im too lazy to do all that math.LOL
It would be awesome to have a 150+mph 4 cyl though!
That would rock!!!

wonder what the 04 srts are rated......hopfully over 160....

ive gone 155 in that thing and it will still pullin, i was just running out of road and i needed to change my pants.... :D

Drag limited means that the car's horsepower is insufficient to push the car through the air any faster. Easy example, if you're doing 100mph, then you need a certain part of your power push through the wind and keep the same speed up. As the speeds increase, so does the pressure on the car, and the power required to keep steady speed. Let alone the power required to increase speed even more. That's one good reason why SUV's are hard to get going over 100. AVERAGE Suv's that is. Most have such a force to push at 100+ mph that you have to floor it just to keep speed.

I/H/E should bump that up. With enough mods, it'll run out of gear.

Is anyone thinking of aftermarket ECUs for the Cobalt? I'm thinking upped rev limiter and more aggressive tuning.

The official word from GM is that the Cobalt SS has a 143 MPH Top Speed and it is NOT electronically limited (governed).

Chevrolet is also notorious for under-rating its high performance cars true abilities.
All I can say is I've had my Red Line 2 needles above 140 MPH and the climb from 130 to 140+ was slow. I'm guessing it took 2 miles from 80 mph to hit the 140+. It was still climbing and not close to redline on the tach but I quit for 2 reasons: 1) there are no numbers above 140 so anything would be a guesss and 2) my exit was coming up and ya never know when a cop is hiding behind a bridge abuttment (sp)

However, on a tank of 87 octane, the ECU caused an engine limit of 127 MPH on my first attenpt to hit the 140 mark.

However, on a tank of 87 octane, the ECU caused an engine limit of 127 MPH on my first attenpt to hit the 140 mark.

hahahaha.. you'd be surprised with the different "attitudes" my car has when it comes to 87 89 91... (here in cali it goes to 91 :( )

87= feels like im towing a boat
89= decent, normal power
91= full power, on steriods

:) lol, it hilarious sometimes.

hahahaha.. you'd be surprised with the different "attitudes" my car has when it comes to 87 89 91... (here in cali it goes to 91 :( )

87= feels like im towing a boat
89= decent, normal power
91= full power, on steriods

:) lol, it hilarious sometimes.
I only ran 3 tanks of 87 before I got "educated". Now it's only a steady diet of shell or bp 93 octane. I won't pay the extra $.10/gal for Sunoco ultra 94, I didn't see any difference between the 93 & 94 when I tried a tank.

All I can say is I've had my Red Line 2 needles above 140 MPH and the climb from 130 to 140+ was slow.

However, on a tank of 87 octane, the ECU caused an engine limit of 127 MPH on my first attenpt to hit the 140 mark.

I think that with most every car (that is not electronically governed) the last few MPH comes very slowly, but from what you have posted the Cobalt SS may be able to touch 150 out of the box if given enough room to stretch its legs.

The reason for the 127 MPH shut down was that the knock sensor triggered the ECU to kill the power due to constant and excessive detonation caused by the low octane fuel.

from what you have posted the Cobalt SS may be able to touch 150 out of the box if given enough room to stretch its legs.

i dunno about 150, i really doubt that.. at least not out-of-the-box...

srt-4's touch 155 correct?.. but then again THEY have MORE hp...

i say 140 and it will get cut off.. that or it might run out of gear

i dunno about 150, i really doubt that.. at least not out-of-the-box...

srt-4's touch 155 correct?.. but then again THEY have MORE hp...

i say 140 and it will get cut off.. that or it might run out of gear


Oh not me, I think it-ud do 150 (if you dropped out of an airplane).

The SRT-4s are electronically limited to 148.
SS might hit 150 with the winds from heaven at its back.

The SRT-4s are electronically limited to 148.
SS might hit 150 with the winds from heaven at its back.

oh ok thanks..

and haha at the last part :D

The SRT-4s are electronically limited to 148.

Incorrect. SRT-4s are limited only by gear. Proven on the Autobahn in Germany with a GPS, 162mph.

Incorrect. SRT-4s are limited only by gear. Proven on the Autobahn in Germany with a GPS, 162mph.

hmm.. i have a video that shows otherwise....

unless they had a LONG time to hold it at those speeds...

the vid show it topping out at 155mph, then they show it with stage 1 reaching 160mph...

162mph going downhill i say!.... ;) juss playin' :D

welcome to the site btw

Maybe with the govenor removed, but my friend Nathan has an SRT-4 and he says it would cut off at 148 before he got his Stage 1. And I've heard that elsewhere as well. BUT I have never been in an SRT-4 goin that fast so I don't know for a solid fact. Just what he said his car would do.

I know for a fact that I've taken my car over 160 mph before (Very scary) and the car was still pulling. Just didn't see any reason to push it more, if my needle won't go past the 160 mark.

I know for a fact that I've taken my car over 160 mph before (Very scary) and the car was still pulling. Just didn't see any reason to push it more, if my needle won't go past the 160 mark.

Was it pulling to the right or to the left?
It could need an alignment which can be "very scary" indeed.

Was it pulling to the right or to the left?
It could need an alignment which can be "very scary" indeed.

Not the kind of pulling I was talking about, but yes, it that was to happen, that would be even more scary.

Not the kind of pulling I was talking about, but yes, it that was to happen, that would be even more scary.

yea, "pulling" to me at 160mph has to be the feeling that you're traveling 2.6ish miles every minute

it wasnt "pulling".. and i doubt it had more gear over 160, seriously, not stock!

Was it pulling to the right or to the left?
It could need an alignment which can be "very scary" indeed.
I actually think he was jokin... and its pretty funny... :D

I actually think he was jokin... and its pretty funny... :D

.....lol, yup

Maybe with the govenor removed, but my friend Nathan has an SRT-4 and he says it would cut off at 148 before he got his Stage 1. And I've heard that elsewhere as well. BUT I have never been in an SRT-4 goin that fast so I don't know for a solid fact. Just what he said his car would do.

check out My club site (www.dodgez.com) and click "videos". we have two videos of our club guys going 155mph (stock) and 160mph (modded) in SRT-4's, as well as our club car (new yorker) kicking the crap out of a Cobra, lol. Good times.

check out My club site (www.dodgez.com) and click "videos". we have two videos of our club guys going 155mph (stock) and 160mph (modded) in SRT-4's, as well as our club car (new yorker) kicking the crap out of a Cobra, lol. Good times.

i knew it was 155mph!

man, where do u find places to take ur car that fast... around my area (flint michigan) cops are Everywhere EVEN IN THE COUNTRY ROADS!!! i got my old Grand prix GT 91' up to 128 and was gonna keep going if i didnt get pulled over on a back road in the the middle of B.F.E (bum F#@$ Egypt ) <-- for those who dont know

man, where do u find places to take ur car that fast... around my area (flint michigan) cops are Everywhere EVEN IN THE COUNTRY ROADS!!! i got my old Grand prix GT 91' up to 128 and was gonna keep going if i didnt get pulled over on a back road in the the middle of B.F.E (bum F#@$ Egypt ) <-- for those who dont know

When your car is fast it doesn't take long to get there :D

Hey now, don't start trolling our boards with your TurboDodge nonsense, hahaha! :p

hmm isnt fast anything thats going faster then everything around it? cuz if thats true then my old car was fast.. -_- !

Well yeah but there is a difference in "fast" and "quick" a bicycle can be fast with the right gears and if it is riding down a slope. My friend has went 62mph (he claims on his road bike) and I also know a guy that got stopped by a cop because he was passing people (cars) in a 30mph zone... on a bike.
Like I said anything can GO fast, but not everything can get there QUICKLY ... unless dropped from an airplane. :D

I had a speedo on my 18 speed huffy mountain bike. had it up to 40mph on a daily basis while "training" my legs for soccer season.

I had a speedo on my 18 speed huffy mountain bike. had it up to 40mph on a daily basis while "training" my legs for soccer season.

Was it governed like the Cobalt?

http://www.tirerack.com/tires/tiretech/general/speed.jsp

Was it governed like the Cobalt?


I think so.... because once I got it up to 44mph and was pumping away at the pedals, one of them fell off, causing me to swerve across the road and almost wreck. :p

From what I heard there is no governer, instead they have Z rated tires that go up to 143 mph. Honestly I have no clue whats on the actual production model, have to wait for someone with an SS S/c to tell ya.

Cobalt SS comes with Pirelli Pzero Roso tires. They are 93 W rated.

Well yeah but there is a difference in "fast" and "quick" a bicycle can be fast with the right gears and if it is riding down a slope. My friend has went 62mph (he claims on his road bike) and I also know a guy that got stopped by a cop because he was passing people (cars) in a 30mph zone... on a bike.
Like I said anything can GO fast, but not everything can get there QUICKLY ... unless dropped from an airplane. :D

Call it what you want... it does 155 stock.

Oh I'll call the SRT-4 BOTH! I rode with Nathan and its a DAMN fast car!!! And QUICK to get there. I was just speakin of all vehicles in general when I said that.