All this is now public info.
http://media.gm.com/us/powertrain/en/product_services/2008/08car.htm

Engine power curve:
http://media.gm.com/us/powertrain/en/product_services/2008/HPT%20Library/Ecotec/2008%20LNF/2008_20L_LNF_Cobalt%20SS.pdf

Engine Spec Sheet:
http://media.gm.com/us/powertrain/en/product_services/2008/Spec%20Sheet/Ecotec/08_LNF.xls

Engine Information:
http://media.gm.com/us/powertrain/en/product_services/2008/Whats%20New/Ecotec/08_LNF.doc

Trans Spec Sheet:
http://media.gm.com/us/powertrain/en/product_services/2008/Spec%20Sheet/Transmissions/2008%20Manuals/08_GME_MU3.xls

Transmission Info:
http://media.gm.com/us/powertrain/en/product_services/2008/Whats%20New/Transmissions/2008%20Manual%20Transmission/08_MU3.doc

the torque curve on that motor is sexy!!!

DAMN! torque right off the bat

so comparin s2 graph vs ss/tc graph,seems like the ss/sc is better...turbo hits full power at almost redline,where the ss/sc hits it around 4500

Awsome info this needs to be made a STICKY mods sticky please

so comparin s2 graph vs ss/tc graph,seems like the ss/sc is better...turbo hits full power at almost redline,where the ss/sc hits it around 4500

True
But the TC is making the same power @ 4500rpm as the SC is. So basically the SC is @ max power, while the TC is just getting stronger and stronger higher up the RPM's

True
But the TC is making the same power @ 4500rpm as the SC is. So basically the SC is @ max power, while the TC is just getting stronger and stronger higher up the RPM's

Uh-oh... someone didn't take into account drive train losses and under ratings.... :nono:

A supercharged engine creates more drivetrain loss. It also creates parasitic drag on the engine as it's belt driven and the unit is 50% heavier than a small turbo.. A turbo will always be a better choice, for power, efficiency, economy, you name it. There's a reason sooooo! many 2003-2004 cobra owners are swapping out their superchargers for a turbo or two. I had a SS\SC, did a power adder swap to a turbo and the car woke up big time. And when the SS\SC peaks out in its power band the SS\T just carries on up the rpm band with more power and way!!! more torque.

A supercharged engine creates more drivetrain loss. It also creates parasitic drag on the engine as it's belt driven and the unit is 50% heavier than a small turbo.. A turbo will always be a better choice, for power, efficiency, economy, you name it. There's a reason sooooo! many 2003-2004 cobra owners are swapping out their superchargers for a turbo or two. I had a SS\SC, did a power adder swap to a turbo and the car woke up big time. And when the SS\SC peaks out in its power band the SS\T just carries on up the rpm band with more power and way!!! more torque.

.... um... ok....
You should use the search button before posting that kind of stuff.
It's been beaten to death a million times, and I don't think anyone wants to see this thread go that was.

.... um... ok....
You should use the search button before posting that kind of stuff.
It's been beaten to death a million times, and I don't think anyone wants to see this thread go that was.

ya, beat too damn much. its alreaty ready for roasting cause its tender.


but truth be told, the cobalt ss shouldve been the lnf in the first place, just my 2 cents though.

Owner's Manuals:

2008
http://content.gmownercenter.yahoo.com/docs/manuals/chevrolet/2008_chevrolet_cobalt_owners.pdf

2009
http://content.gmownercenter.yahoo.com/docs/manuals/chevrolet/2009_chevrolet_cobalt_owners.pdf

Do the hp and torque curves seem odd to anybody else? I haven't seen that many, but the ones I have seen are not nearly that straight-lined. If it wasn't something "official" I might be calling bs.

A supercharged engine creates more drivetrain loss. It also creates parasitic drag on the engine as it's belt driven and the unit is 50% heavier than a small turbo.. A turbo will always be a better choice, for power, efficiency, economy, you name it. There's a reason sooooo! many 2003-2004 cobra owners are swapping out their superchargers for a turbo or two. I had a SS\SC, did a power adder swap to a turbo and the car woke up big time. And when the SS\SC peaks out in its power band the SS\T just carries on up the rpm band with more power and way!!! more torque.

the ss/sc carries its power well all the way to 7000 grand .... most ss/sc make peak hp at 6500 rpm. a ss/tc's power starts to fall off right around 5500 rpm or so .... your statement is false. Yes the ss/tc makes more hp & tq stock, but a ss/sc is no slug and most deff. has a great power curve.

not to be a dick.. but ... repost

http://cobaltss.net/forums/showthread.php?t=118908 ;)

it just has the engine info on there but it has a link to where you can find the rest of the stuff

not to be a dick.. but ... repost

http://cobaltss.net/forums/showthread.php?t=118908 ;)

it just has the engine info on there but it has a link to where you can find the rest of the stuff

check again. OP posts is from 2007, link you gave is from 2008

check again. OP posts is from 2007, link you gave is from 2008

ahhh i see

however my link is stickied lol .. didnt realize this was just a bumped up old thread

Zombie Thread, Run!

the torque stays from 1800 or so to almost 6000 thats awesome I love that.

The crossover point should be at 5250 RPM, I think the scaling on the chart for the torque causes the curve to be skewed a little.

I like that torque "curve", it's almost like a diesel.

New member and owner of a SS/TC sedan, some of the links dont work for my computer, was wondering if any1 can help out with specs on the lnf and even more info on the turbo? It sounds stupid to ask but is it even necessary to idel the engine before shut down to prevent turbo damge? I work on semi's for a living and on the heavy duty side we dont need to worry about that crap?

Is this site dead or something?

no u dont have to let it idel before shutdown. since u usually drive nice the last minute or so when u come to where ur going, and also it is water and oil cooled so there isn't any need unless u drive the shit out of it or are at the track then let it idel for a little before shut down to be safe.
turbo is ko4 twinscroll. thats all i know

am i the only one who still looks at our LNF specs?

Uh-oh... someone didn't take into account drive train losses and under ratings.... :nono:



Jeeze people. Who cares who has what. The critics, magazines and people with way more knowledge than most of us have praised the LNF powered Cobalt as being far ahead of the old Supercharged. Lets stop arguing about it. Drive train loss, underrated that....Why can't people just accept progression. The SS was near the bottom of it's class as a Supercharged vehicle, now it virtually leads it's class. END OF STORY!!! lol

nice:lol:

Jeeze people. Who cares who has what. The critics, magazines and people with way more knowledge than most of us have praised the LNF powered Cobalt as being far ahead of the old Supercharged. Lets stop arguing about it. Drive train loss, underrated that....Why can't people just accept progression. The SS was near the bottom of it's class as a Supercharged vehicle, now it virtually leads it's class. END OF STORY!!! lol

Jhyeah zombie thread....btw, the LSJ definitely wasn't at the bottom of its class. just sayin :)

great information! sub'd

Jeeze people. Who cares who has what. The critics, magazines and people with way more knowledge than most of us have praised the LNF powered Cobalt as being far ahead of the old Supercharged. Lets stop arguing about it. Drive train loss, underrated that....Why can't people just accept progression. The SS was near the bottom of it's class as a Supercharged vehicle, now it virtually leads it's class. END OF STORY!!! lol

Way to quote a 2 year old post.... :lol: