View Full Version : LSD


Eddie
04-11-2004, 06:25 PM
make an LSD standard on the SS s/c, be one step ahead of the game give it atleast wrx power, ion redline ran 14.7 1/4 road and track tested, lets hope the ss s/c will be low 14 and i mean low like 14.0 :D

RedCavyRS99
04-11-2004, 06:55 PM
wrong forum but sounds good lol

JonyyB
04-11-2004, 08:04 PM
moving...

Eddie
04-11-2004, 09:06 PM
lol my bad i just seen the tips part and i thought something else, he he my bad. just drove in a srt-4 today pretty impressive like how u can take off normal then half way threw first just step on it and spins the tires.

JonyyB
04-11-2004, 09:21 PM
just drove in a srt-4 today

Sweet. I need to go "test drive" one of those suckers lol

Eddie
04-11-2004, 09:30 PM
gm needs to let car and driver or some magazine test drive the ss s/c allready i wanna know 1/4 mile numbers lol, i hope it does 14.5 or lower i'm really hoping. it would be sweet i'd definatly get one if it does 14.3 figure 12 psi srt is 14 or 17 something like that so room for upgrade to be able to handle the srt-4.

RedCavyRS99
04-11-2004, 09:36 PM
The SS is gonna be a fun car one way or another

zstyle
04-17-2004, 11:11 PM
ion redline ran 14.7 1/4 road and track tested

Road and Track ran a 14.7 with it??? Is that in the newest issue or what? SCC could only get 15.3 out of it, mainly because they only ran a 7.1 to 60. I hope that the 14.7 is true, thats more of what I was looking forward to out of the S/C than the 15.3.

SilverCSS
09-15-2004, 05:46 AM
ion redline ran 14.7 1/4 road and track tested

Road and Track ran a 14.7 with it??? Is that in the newest issue or what? SCC could only get 15.3 out of it, mainly because they only ran a 7.1 to 60. I hope that the 14.7 is true, thats more of what I was looking forward to out of the S/C than the 15.3.

With LSD, and 205hp...I think we'll see around 14.7. Without..I'd still say 14.9 or a bit less. It really depends on the driver, but the better the grip, the faster through the 1/4 mile, obviously. :D

zstyle
09-17-2004, 10:17 PM
Car and Driver ran a 14.7 with the Redline this month, and a 0-60 of 6.1. Pretty good, seeing as these numbers were without the LSD. I'd imagine an LSD would trim at least a couple of tenths off those times, is that close?

SilverCSS
09-20-2004, 12:36 AM
Car and Driver ran a 14.7 with the Redline this month, and a 0-60 of 6.1. Pretty good, seeing as these numbers were without the LSD. I'd imagine an LSD would trim at least a couple of tenths off those times, is that close?

With a good driver (good launch assisted by the LSD), yeah. I'd say a 14.5 is possible. Plus, the Cobalt has an additional 5hp. Someone should check up on the dimensions/weight/etc. of the Redline. I would, but I need to go eat. :D If no one has by the time I wake up tomorrow, I'll get on it. Weight plays a significant role, as we know.

Arrowslinger
09-20-2004, 08:40 AM
O4 Redline

http://www.carslots.com/automotive-article-1665.html

Base Price $ 20,385
Price As Tested $ 21,320
Engine Type supercharged and intercooled
dual overhead cam inline 4-cylinder
Engine Size 2.0 liters / 122 cu. in.
Horsepower 205 @ 5600 rpm
Torque (lb-ft) 200 @ 4400 rpm
Transmission 5-speed manual
Wheelbase / Length 103.2 in. / 185 in.
Curb Weight 2590 lbs.
Pounds Per Horsepower 13.0
Fuel Capacity 13.2 gal.
Fuel Requirement 91 octane unleaded premium gasoline
Tires P215/45 ZR17 Dunlop SP Sport 9000
Brakes, front/rear vented disc / solid disc, antilock standard
Suspension, front/rear independent MacPherson strut /
semi-independent torsion beam axle
Drivetrain front engine, front-wheel drive

PERFORMANCE
EPA Fuel Economy - miles per gallon
city / highway / observed 23 / 29 / 25
0 to 60 mph est. 7 sec

zstyle
09-20-2004, 12:49 PM
2590 lbs. is wayyyy too light for that car. All other figures I've seen were in the 2900lb area.

Arrowslinger
09-20-2004, 01:32 PM
2590 lbs. is wayyyy too light for that car. All other figures I've seen were in the 2900lb area.

You are right:

http://media.gmcanada.com/division/canada/english/products/saturn/ion_index.html

Curb weight (lb / kg): 2930 / 1329

Co-Bolting
09-22-2004, 11:40 AM
How heavy is the cobalt?

RedCavyRS99
09-22-2004, 06:48 PM
there are so many different weight numbers being thrown around who really knows what it will weigh

Co-Bolting
09-22-2004, 07:39 PM
does anyone have an idea if it will be heavier then the RL or as heavy as the Rallyart (2900) :?:

RedCavyRS99
09-22-2004, 08:13 PM
prolly more then the RL since its not going to have plastic panels

Co-Bolting
09-23-2004, 11:18 AM
^^^ Amen for that. Its like the new neon. Fun car to drive, but the inside sucks. Its so plan and like the old neons. I think they should have spiced the inside up a bit.

zstyle
09-23-2004, 10:28 PM
Yeah I sat in a Redline the other day (didn't drive, stupid guys were too busy) and the interior kinda sucks. The seats are nice, but the center stack and center guages are crappy. The shifter isn't really short... the throws on my 94 Cav arent much longer. The engine looks great though, looks as if it has close to a CAI from the factory.

avro206
09-24-2004, 08:36 PM
Lighter then redline. Doesn't have to quad coupe configuration.

zstyle
10-01-2004, 02:48 AM
It's not a space-frame or plastic panelled though... although I don't know if those two things make a big difference. The Cobalt's interior is much nice though, and may be heavier for that. You'd think the two should be fairly close though.

SS32687
10-04-2004, 11:15 AM
i bet u guys can beat 14.0 sec IF u put like small horsepower instead of upgrade supercharger or turbo kits 8)

saturnd00d
10-18-2004, 12:43 PM
Apparantly the SS will weigh slightly more than the redline, by about 50-90 lbs. but like someone else mentioned, so many weight number are being thrown around to really tell. With an LSD, the car should be able to hit 14.3-14.5 no problem. AEM is currently either in the design or testing stage for a CAI for the ION redline, so that is good news for the SS peeps as well. News is floating aorund that DC sports (bought out by AEM) is currently designing a header for the redline as well which should work for the SS no problem. Once the SS comes out and the market for the delta cars expands, parts should be coming out like crazy. Right now because it's only the ION and the redline, no parts manufacturers are coming out with stuff because of it being such a small market. A little more time, and we'll be able to hang with SRT-4's no problem.

Eddie
10-18-2004, 01:19 PM
have u seen what the car is trapping in the 1/4 mile? 97,98 mph, and only a 14.7, those speeds are good for a low 14 lowr than 14.5, that means traction is an issue, or gearing might suck, but i think traction. if an lsd was installed to handle the traction issues that 97-98 mph, should equal 14.5 or better. please gm install a freakin quaife lsd in the cobalt ss before release. be smart dont be a retard.

Eddie
10-28-2004, 12:58 AM
well looks like its becoming a reality, saturn performance devision is making an lsd option of the 05 red line, thats sweet. i'm lovin it.

JPK
10-28-2004, 01:35 AM
well looks like its becoming a reality, saturn performance devision is making an lsd option of the 05 red line, thats sweet. i'm lovin it.


I just bought an '04.

Hopefully they'll give me a good deal to install an LSD on it.

Eddie
10-28-2004, 03:00 PM
yeah that would be sweet if they give u a deal. maybe incorporate it in to your payment plan.

if you drag, you should definatly do a before and after 1/4 run see your times before and after the lsd install. that would be awsome.

Vita
10-29-2004, 11:35 AM
i'm hoping that with an LSD, we can get MUCH closer to 13's! considering the 14.5 recently run was with a launch of 1500rpms! if we could launch a little higher, with a 2.0 60' time, i think we'll be seeing at least 14.2

zstyle
11-01-2004, 08:44 PM
I agree. These cars have good factory tires, they just get shredded with an open diff. An LSD will help the hole shot considerably IMHO. As someone said, the trap speeds are high, so once the traction issue is dealt with these cars should really get good numbers.

Eddie
11-02-2004, 12:17 AM
yeah i mentioned traps being high and those mph numbers where good for low 14's 1/4 times. and w/ a lsd i think 14.3 is possible, 14.5 is allready wrx times which is respectable, add that lsd and you'll be hunting srt-4's

SilverCSS
11-02-2004, 01:00 AM
yeah i mentioned traps being high and those mph numbers where good for low 14's 1/4 times. and w/ a lsd i think 14.3 is possible, 14.5 is allready wrx times which is respectable, add that lsd and you'll be hunting srt-4's

I don't know about hunting. =) 2003 SRT-4's (minus LSD) were running around 13.9 (with a good driver). The 2004+ have LSD + stage one. I've heard of them running 13.7 or better (again, with a good driver). I do feel, however, a lightly modded Cobalt SS...say, intake, exhaust and perhaps some ECU mods (redline or fuel mapping) would easily drop the SS into SRT-4 territory, or...better.

Eddie
11-02-2004, 01:25 AM
i agree, now if gm makes that option for 270hp than that would be srt-4 hunter. please gm make that a freaken option.

SilverCSS
11-03-2004, 03:50 AM
i agree, now if gm makes that option for 270hp than that would be srt-4 hunter. please gm make that a freaken option.

As much as I hate to say it, I don't think it will be an option. At least not for the 2005 model. If sales go well, and the general response to the Cobalt SS is favorable in GM's opinion, I wouldn't be surprised to see something similar in the 2006 models. But..one can hope. :)

Vita
11-03-2004, 01:13 PM
i agree, now if gm makes that option for 270hp than that would be srt-4 hunter. please gm make that a freaken option.

As much as I hate to say it, I don't think it will be an option. At least not for the 2005 model. If sales go well, and the general response to the Cobalt SS is favorable in GM's opinion, I wouldn't be surprised to see something similar in the 2006 models. But..one can hope. :)

i believe you are correct sir, or they will offer it as an upgrade that voids warranty late in the '05 my

Eddie
11-03-2004, 03:28 PM
its kinda hard for something from gm to void the warranty, its a gm performance part so they kind of have to keep the warranty.

giovanhalen
12-19-2004, 05:36 AM
If the lsd you are referring to is limited slip differrential, your times aren't likely to be any better with it, unless you are using tires that have no grip. A set of slicks or drag radials aren't likely to be breaking loose with 200hp, even without lsd.

SCdyne
12-19-2004, 11:16 AM
Apparantly the SS will weigh slightly more than the redline, by about 50-90 lbs. but like someone else mentioned, so many weight number are being thrown around to really tell. With an LSD, the car should be able to hit 14.3-14.5 no problem. AEM is currently either in the design or testing stage for a CAI for the ION redline, so that is good news for the SS peeps as well. News is floating aorund that DC sports (bought out by AEM) is currently designing a header for the redline as well which should work for the SS no problem. Once the SS comes out and the market for the delta cars expands, parts should be coming out like crazy. Right now because it's only the ION and the redline, no parts manufacturers are coming out with stuff because of it being such a small market. A little more time, and we'll be able to hang with SRT-4's no problem.

Header is already available, check the redline forums for details.. or my site.
I just don't want to say it's for the SS until I have installed and tested it for fit.

Blk01GTP
12-19-2004, 06:54 PM
SRT4>SS

Stage 2 SRT4's are trapping around 108 in the quarter mile.

Going to take a few major boltons to hit 108 in an SS

SilverCSS
12-19-2004, 09:08 PM
SRT4>SS

Stage 2 SRT4's are trapping around 108 in the quarter mile.

Going to take a few major boltons to hit 108 in an SS

As I recall, the SEMA SS had 270hp. I'm sure that's more than enough to trap 108, considering the 04+ SRT-4's with LSD and Stage 1 included are rated at 230. And from what I remember, there wasn't anything too major about the modifications.

What do you think it'd take to get an SS into 'SRT territory'?

Blk01GTP
12-19-2004, 09:24 PM
As I recall, the SEMA SS had 270hp. I'm sure that's more than enough to trap 108, considering the 04+ SRT-4's with LSD and Stage 1 included are rated at 230. And from what I remember, there wasn't anything too major about the modifications.

What do you think it'd take to get an SS into 'SRT territory'?


Rated at 230? Stage 1's put down over 230 to the wheels. Stage 2's are putting down 260 horsepower and 290+lbs of torque to the wheels.

The SS is going to need a bigger blower and it's ECU hacked to contend with those numbers.

Nivo88T
12-19-2004, 10:27 PM
after proper break in, hope that the car gets into the 98-101mph territory stock.our SRT4 got 13.91 stock at 101 mph and a 2.01 60 ft.

the best now with the larger turbo is 12.39@121.41mph. That was with a 2.1 60ft. There is more left in it with LSD and slicks. 11.5x's shouldn't be a problem.

Hopefully the Cobalt SS can duplicate this if i decide to go with one.

SilverCSS
12-19-2004, 11:20 PM
Rated at 230? Stage 1's put down over 230 to the wheels. Stage 2's are putting down 260 horsepower and 290+lbs of torque to the wheels.

The SS is going to need a bigger blower and it's ECU hacked to contend with those numbers.

Would you happen to have any dynos proving that? I'd be interested in seeing some. - I know the SRT-4's were under-rated. The 2003's were rated at 215-220 crank, but were in actuality, putting down 215-220whp. I saw plenty of proof to support that. I'm not saying it's impossible, but you also have to consider the fact that the Ecotec platform is a proven engine. It may take a bit extra to see the same or similar gains as an SRT-4. But if that's the case, it's only due to the fact that Dodge is putting them out with more factory power.

Nivo88T
12-19-2004, 11:48 PM
Would you happen to have any dynos proving that? I'd be interested in seeing some. - I know the SRT-4's were under-rated. The 2003's were rated at 215-220 crank, but were in actuality, putting down 215-220whp. I saw plenty of proof to support that. I'm not saying it's impossible, but you also have to consider the fact that the Ecotec platform is a proven engine. It may take a bit extra to see the same or similar gains as an SRT-4. But if that's the case, it's only due to the fact that Dodge is putting them out with more factory power.
our car made 215/246 stock.

with a $150 wastegate actuator our car put out 241/254.

our best dynojet numbers were in the 264-269whp range with the stock turbo and intercooler. we still were able to attain 110.99 traps with this tiny turbo, stage 1, 3" turbo back and intake system. actually now there are a few SRT4's with stock turbos trapping 110-114mph. Hard to beat that.

Hopefully the performance shines on the ecotec 2.0. would have been nice if it were a 2.4L S/C though :)

SilverCSS
12-20-2004, 12:35 AM
our car made 215/246 stock.

with a $150 wastegate actuator our car put out 241/254.

our best dynojet numbers were in the 264-269whp range with the stock turbo and intercooler. we still were able to attain 110.99 traps with this tiny turbo, stage 1, 3" turbo back and intake system. actually now there are a few SRT4's with stock turbos trapping 110-114mph. Hard to beat that.

Hopefully the performance shines on the ecotec 2.0. would have been nice if it were a 2.4L S/C though :)

You may have the SS beat performance wise for stock capabilities (for now, perhaps that'll change later). I never denied that...but, what about quality? I've sat in a few SRT's..driven a couple...and I wasn't very impressed. The seats were also very uncomfortable...and the interiors very plain. What I've seen of the SS interior and such, it looks worlds better.

Anyway, not trying to start a war. I don't deny the obvious performance capabilities of the SRT..but, as this is a Cobalt forum, most members are bound to be a bit bias. ;) Time will tell.

zstyle
12-20-2004, 01:40 AM
Rated at 230? Stage 1's put down over 230 to the wheels. Stage 2's are putting down 260 horsepower and 290+lbs of torque to the wheels.

The SS is going to need a bigger blower and it's ECU hacked to contend with those numbers.

Yes, and the 2.0L SC in the Cobalt SS has put down 210hp to the the wheels stock in the ION Redline. SCDyne performance has built a header guaranteeing a 10% increase in wheel hp, bringing the 2.0L SC to 230 to the wheels. This is before working on intake and exhaust. The 2.0L SC also is still building power at redline, and if the ECU can be reflashed to increase redline we should see a great increase in power.

In essence, I believe this was all that was done to produce the 270hp Cobalt at SEMA. I/H/E and reflash to raise the revlimiter. Stock S/C, stock IC, stock internals, bolt-ons only other than the reflash.

And as Silver said, I still believe the SRT-4 is a better straightline performance car as far as we've seen. But the Cobalt has a lot of potential, and IMHO is a more well-rounded and premium small car.

Nivo88T
12-20-2004, 02:10 AM
You may have the SS beat performance wise for stock capabilities (for now, perhaps that'll change later). I never denied that...but, what about quality? I've sat in a few SRT's..driven a couple...and I wasn't very impressed. The seats were also very uncomfortable...and the interiors very plain. What I've seen of the SS interior and such, it looks worlds better.

Anyway, not trying to start a war. I don't deny the obvious performance capabilities of the SRT..but, as this is a Cobalt forum, most members are bound to be a bit bias. ;) Time will tell.
things are hard to tell when the real car is not out yet.
I like the SRT4 since i have worked with it and was able to extract 413whp at 24psi with room left in fuel and boost. Our SRT4 sit just out side.

I am here just as you are. we are looking forward to the release of the Cobalt SS.
I actually like the support in the SRT4 seats. Quality isn't as bad as one thinks either, there are somethings i can pick on coming from a Japanese car buying/modifying background. so far we have had:

196 passes down the track
148 dyno pulls
51,000 miles

And thus far on the stock internals, only thing that has broken was our drivers side axle. well it's not broken yet but it's on its way out.

I am here to read and know more about the Cobalt. I am not into 4DR cars. we already have an SRT4 that we have to play with but it's hers. I am looking for a "NEW" car.
I am weighing my options and I keep my eyes open for my next thing to build up.

I am not done with our SRT4 either....

Vita
12-20-2004, 10:15 AM
196 passes down the track
148 dyno pulls
51,000 miles

And thus far on the stock internals

that's great, hopefully the 2.0 will be as bullet-proof as the 2.4 in the SRT, should be, but we'll see!

also, the computer seems to limit boost to the 12 or so PSI, when the headers Adam produced were on the dyno, he said the boost pressures stayed the same, which is why the power increases were so great (boost should come down with freed-up exhaust). so with the headers, a 3" exhaust, free flowing muffler and intake work, i bet we start to see some serious numbers on the dyno from these cars. hopefully by opening up that much, we'll really see the potential of the m62 in action, as it is the most efficient version yet.

also, i'm hoping it can keep up with the I/H/E and still put out the 12psi once all that is done, then we'll really know that these cars are detuned from the factory!

Eddie
12-20-2004, 12:53 PM
call me wierd but i like the interior of the srt-4. its simple not wow amazing but simple and simple sells. just like the cavalier, not the best interior but its simple easy to get used to and fairly comfortable, srt-4 seats are comforable.

zstyle
12-20-2004, 01:30 PM
call me wierd but i like the interior of the srt-4. its simple not wow amazing but simple and simple sells. just like the cavalier, not the best interior but its simple easy to get used to and fairly comfortable, srt-4 seats are comforable.

Ugh, I hate the Cavalier/Sunfire interior, and I sell the things! I actually think that the interiors in the 3rd gen j are worse than my 2nd gen. Not that my car is anything to write home about. :rolleyes:

Blk01GTP
12-20-2004, 04:10 PM
hopefully by opening up that much, we'll really see the potential of the m62 in action, as it is the most efficient version yet.

Eaton and Efficient should not be used in the same sentence. If a M90 was swapped into the 62's place.. You could make more power with Less Pounds of Boost.

Vita
12-20-2004, 05:31 PM
Eaton and Efficient should not be used in the same sentence. If a M90 was swapped into the 62's place.. You could make more power with Less Pounds of Boost.

true, but i'll take a Gen V m62 over an earlier generation m90, but give me a Gen V m90 and i'll call it a day (the 5th gen m90 is more efficient than a P&P 4th), not to mention their new front inlet design that hasn't even been used in any application yet


scratch that, just give me a 2300ax and i'll be happy with that... it's kind of pointless to swap out to a used m90 anyways

Nivo88T
12-20-2004, 06:41 PM
I like the interior of the cobalt, some say it's too european. just like alot of the Camaro/trans am guys don't like the foreign interior design of the GTO.

Vita
12-21-2004, 09:54 AM
I like the interior of the cobalt, some say it's too european. just like alot of the Camaro/trans am guys don't like the foreign interior design of the GTO.

thats recockulous! so american cars are starting to get nicer and people complain! the GTO has a real nice interior, and the cobalt seems to be the same, hopefully GM will stick with it and upgrade the whole lineup, it would definitely bring sales back from the imports

SilverCSS
12-21-2004, 12:54 PM
Part of the appeal, to me at least, of the Cobalt is the more European style interior. My friend has a 2001 Audi 1.8t Quattro..and comparing his interior, with the pictures of the Cobalt...even he admits the Cobalt's interior looks amazing (for an American car). Add the Ecotec on top of that, and I'm sold. There's no real sense in trying to debat what the SS can and can't do. Fact is, the car ain't out yet. :) We have projections (based off the RL)..but, no one will know for sure until the day someone starts tuning. Until then, we can keep fantasizing and drooling.

redd214
12-21-2004, 02:41 PM
and just wait till people start playing with the cams...... :bow:

Vita
12-21-2004, 04:18 PM
and just wait till people start playing with the cams...... :bow:

and twin screw blowers...

SilverCSS
12-21-2004, 04:47 PM
And wings! :bow: :bow:

Blk01GTP
12-21-2004, 05:48 PM
The biggest Limiting Factor now is the ECU limiting boost. Crack the ECU and the door is open for smaller pulley's and such.

Vita
12-22-2004, 09:45 AM
The biggest Limiting Factor now is the ECU limiting boost. Crack the ECU and the door is open for smaller pulley's and such.


ahhh, so i'd like to say something on that. right now i'm not sure, BUT when the headers were developed for the RL, they noticed that the boost levels stayed the same, but gained an unexpected amount of power. i have a theory on this, and i made a lengthly post on redlineforums, but my theory is that since/if the computer limits boost, opening up the exhaust will drop the boost down, but since the computer wants to limit it to the 12.5 or so PSI, when you open the exhaust, lowering boost, the computer doesn't limit it until it gets back up there. i don't think messing with the computer needs to be done until intake/exhaust are both opened up FULLY. then cooling issues should be addressed, as i believe you have stated previously on these forums, then a pulley swap and PCM re-tune, or just re-tune, and we should be where the 270hp cobalt was at (and they didn't change the headers) possibly with only the use of an SAFC

Blk01GTP
12-22-2004, 12:59 PM
i have a theory on this, and i made a lengthly post on redlineforums, but my theory is that since/if the computer limits boost, opening up the exhaust will drop the boost down, but since the computer wants to limit it to the 12.5 or so PSI, when you open the exhaust, lowering boost, the computer doesn't limit it until it gets back up there.


Exactly. You will actually decrease the amount of boost pressure when you open up the exhaust. What i'm saying is that the ECU needs to be hacked to increase boost Past 12.5 Psi. As we all know.. The M62 is Maxed as it is from the factory. Adding a smaller pulley is only going to add more low end torque and not add much top end horsepower.

Also.. What does the Redline guy's A/F look like? Is it VERY rich? Can gain some power leaning it out.

Vita
12-22-2004, 01:17 PM
not sure on the A/F, but i know the blower is spinning at close to it's max rpms

i don't even think we'll have to switch pulleys, maybe just up the boost limit and open things up! i'm loving this car more and more by the minute

SilverCSS
12-22-2004, 02:54 PM
Exactly. You will actually decrease the amount of boost pressure when you open up the exhaust. What i'm saying is that the ECU needs to be hacked to increase boost Past 12.5 Psi. As we all know.. The M62 is Maxed as it is from the factory. Adding a smaller pulley is only going to add more low end torque and not add much top end horsepower.

Also.. What does the Redline guy's A/F look like? Is it VERY rich? Can gain some power leaning it out.

Maxed from factory? If it were an m45, I'd agree..but an m62 should be able to handle up to 20psi just fine. That's been my understanding and experience, as far as what I've seen and read. Any reason for feeling 12.5psi is max on the m62?

Vita
12-22-2004, 04:41 PM
the problem isn't max boost, it's max RPM

if you have an extremely restrictive engine, i'm sure the m62 can push 20 psi, it's just the engine handling it. you can check out eatons website for the graphs on it, but with a pulley ration of 1.85:1, it's spinning at ~12000 rpms, the charts stop at ~14000

as stated before, opening up exhaust reduces boost, but when a set of headers were test fit and dyno'd on the Redline, boost levels remained the same confirming (hopefully) that boost is limited to an extent. theoretically boost should drop with a set of headers that net ~25-30hp to the wheels, but it didn't. that means the more we can open up the engine, the more the computer will let in!

i'm sure the pulley on the redline/cobalt is good for more than 12.5psi, it's just that the computer won't let it, so that's all you see, but by opeing up more of the system, you unleash the potential of those limits. if we could get the computer to stop limiting the boost, i'm sure we'd see more than 12psi STOCK

i'm actually interested in what RPM we start to see that same 12psi, and if it comes on early in the RPM, it seems to me like we get full boost by 4kRPMs

Dman
12-22-2004, 04:50 PM
thats what im wondering...when that 12pis starts becoming constant because of the computer...man i cant wait to see the mods possible for this thing...this is gonna be interesting...

SilverCSS
12-22-2004, 05:42 PM
Which leads into another series of questions. The first of which would be: What's the stock valvetrain like? If we're talking cracking the ECU here, why not crack it to raise the redline? I'd be curious to know what it could handle..and if it needs a bit of reinforcing, what could be done about that (GM performance VT kits, or aftermarket, etc.) In theory, with all that you're saying and we've seen/know...opening up the engine (I/H/E), then cracking the ECU to raise boost and redline, perhaps...man. That'd be pretty damn nice.

Blk01GTP
12-22-2004, 07:08 PM
Which leads into another series of questions. The first of which would be: What's the stock valvetrain like? If we're talking cracking the ECU here, why not crack it to raise the redline? I'd be curious to know what it could handle..and if it needs a bit of reinforcing, what could be done about that (GM performance VT kits, or aftermarket, etc.) In theory, with all that you're saying and we've seen/know...opening up the engine (I/H/E), then cracking the ECU to raise boost and redline, perhaps...man. That'd be pretty damn nice.

I don't know how high the stock valvetrain would handle 7000+ rpm but you also have to worry about the stock Connecting Rods and such.

If you crack the ECU and allow the engine to rev to 7500... You will increase boost pressure on the top end.

chairezdaniel
12-29-2004, 08:00 PM
you guys need to read the motortrend review about the SS very good review and has the 1/4 time and 0-60

http://www.cobaltss.net/forums/showthread.php?t=827

osmose
12-30-2004, 01:12 PM
I don't know how high the stock valvetrain would handle 7000+ rpm but you also have to worry about the stock Connecting Rods and such.

If you crack the ECU and allow the engine to rev to 7500... You will increase boost pressure on the top end.

I belive the connecting rods on the LSJ are forged , combined with the short stroke of the 2.0L the rods will be fine, you will be able to hit 8000 RPM.

If anyone wants to do some searching to find the max tensile load, and max compressive load of the con rods i could calcualte the max hypothetical RPM before the rods snap.

Just a question but why it this discussion under the post title of LSD.

Turboaddict
01-01-2005, 07:39 PM
to reply to the m62 power limit think about this.
1994 pontiac bonneville ssei has a 3.8L with the m62 and it produces 225hp it revs to 5.5-6k
they add pulleys to them to make around 11psi with no intercooler. now 11psi on a 3.8L engine and the cobalt is only 2.0L is has the possibility to make alot more power.
also note that thats a 1994 model m62 they may have made it more efficient since then.





Nicolas

zstyle
01-06-2005, 10:06 PM
I don't know how high the stock valvetrain would handle 7000+ rpm but you also have to worry about the stock Connecting Rods and such.

If you crack the ECU and allow the engine to rev to 7500... You will increase boost pressure on the top end.

The Cobalt SS 272 at SEMA apparently made peak hp at 7000RPMs. That was with stock internals and valvetrain.

giovanhalen
01-11-2005, 10:36 PM
According to GM the ecotec's connecting rods broke at 285hp @ 4400rpm on the dyno.

Mekanic
01-12-2005, 01:13 AM
Don't know if this was said yet.

But I went to buy a Redline today (didn't...glad too) and I was talking to the managers and stuff at the dealership. I asked about this elusive performance package.

He said "YES, Its called the Competition package, it will come with a boost gause, tach, LSD, and colored wheels" I asked how much "about 1450" he replied. When, I asked " we will be able to order them mid February"

The LSD is not an illusion it will be here in a month. I also asked, this is NOT going to be a dealer installed option, it is a factory option. Sorry anyone who bought one and wants one :(

BUT you can get them from Quaef (sp?) that bolts in. :)

T type Z
01-12-2005, 10:25 AM
According to GM the ecotec's connecting rods broke at 285hp @ 4400rpm on the dyno.


im pretty sure that was the connecting rods from the 2.2L.

Vita
01-12-2005, 01:15 PM
im pretty sure that was the connecting rods from the 2.2L.

it was, we have ugraded rods in the 2.0, among other things

BlackCobaltSS
01-13-2005, 11:54 PM
Ok im just really really confused, the magazines contradict each other and there were a few straight answers on here but i just want to be blunt about it. i ordered a 05 cobalt ss s/c on tuesday, its being finalized tommorrow but i need to know, and please be blunt, is the LSD available at this time, or do i have to wait months and months to get the damn thing...just be blunt dont give some extended explanation please, if i cant get the LSD then i dont even want the car, cuse i'll be pissed when it comes out in like 3 months with a damn LSD. thanks for any help you have to offer.

KYLEWINK

titaniumss
01-14-2005, 01:15 AM
Its said that the option will be available in February, which no one will even get a SS untrilo then anyways so just tell your dealer to wait for the option code to be open and then order it as soon as it comes up, thats what i did.

BlackCobaltSS
01-14-2005, 01:55 AM
Its said that the option will be available in February, which no one will even get a SS untrilo then anyways so just tell your dealer to wait for the option code to be open and then order it as soon as it comes up, thats what i did.


thank you very very much for your reply, i was so depressed thinking it wouldnt come till sometime in march, im "re"excited about this car, i fell so deeply in love with it at the LA Autoshow that i ordered it less than 24 hours later, tommorrow im supposed to go down to finalize everything so i guess i'll just talk to the fleet manager and set something up, again, thank you.

Mekanic
01-14-2005, 03:17 AM
Or you can get a normal SS and get a LSD from Quaef (sp?) for it :D

Zefhix
01-14-2005, 04:24 PM
Actually, I got it all straightened out
http://www.cobaltss.net/forums/showthread.php?t=933