I am not familiar with modding and come to you seeking guidance.

Say my goal is 400hp, or at somewhere approaching 400 at the wheels. First off, here are my specs/preferences:

- I have the 2.0 SS/SC
- I'd rather not do Nitrous
- I'd like to keep the supercharger, and pass on any turbo charger

From reading the forums a bit I gather the following items would be a good staring point for adding the hp:

- Intense stage 3 (+65hp)
- Corsa exhaust (+12hp)
- Injen intake (+17hp)
Total (+94hp)

Adding 94 to the 205 stock would leave me at not even 300. What areas should I work on next? Suppose I feel I've already provided enough room in the budget for suspension, clutch, etc upgrades, yet still have room to increase performance. What would you upgrade next?

Maybe you'd be more comfortable if I phrased my question this way: if you had your cobalt paid off, and had a budget of somewhere between $5k and $10k, what would you do with it? (that is assuming you would rather upgrade your cobalt rather than trading it all in for a 30k+ car like an STi or whatnot).

I know this was a long post, and a tedious question, but I greatly appreaciate the help. This site definitely seems to be a very friendly and helpful community!

 

Twin Charge

 

You can't add horsepower numbers like that. The Intense kit shows roughly a 15-17%increase over stock. That is no where near 65 hp. If I had the theoretic budget, I would go turbo. That's how you are going to get to 400.

 

According to the Cobalt Bible there is not a way as of right now to reach those gains with the stock SC. Sorry. Good luck.

 

Again, sorry I'm not super knowledgeable about this stuff, but I'm trying to learn. Thanks for the help! So should I try to procure a higher PSI super or is dumping the super for a turbo a smarter option? Before I spend crazy money on the car, I'm just trying to get a feel for what should be the right direction. Again, your thoughts and opinions are appreciated!

 

dumping super for another super. like kennybell supercharger would be more logical as its a twin screw. but when one becomes available for swap will be the question.

 

M90 swap.

 

I would look to a twin screw S/C, forged pistons with raised compression ratio (10.0:1), cams, valvetrain, head (from what I have read this is a serious restriction), full exhaust, intake, injectors, and I'm sure there is more. First things first, we need someone to crack the ECU to allow tuning.

 

I thought the M90 won't fit in our engine bay?

 

why not just use something for fuel management

 

I take it there are currently no twin screw superchargers available, correct? Has there been any tenative release dates set for one?

 

Probably not until someone can crack the code.

 

If it did it would be very tight. The snout for the pulley is longer also, so the alignment would be off.

 

Whippe twin screw is your only hope. The M62 creates too much heat to push anywhere near 400HP.

 

So the whipple is a custom application, or is one just not yet available for our engine?

 

shoot for 300 hp first... then go for 400

 

Okay heres a general idea, bigger injectors, bigger fuel pump, ported heads, cam gears, blower pulley, header, full exhaust with no cat, forged pistons and you should be able to run enough LBS to get decent HP, if not enough swap out the blower for a twin screw or procharger type unit that functions similar to a turbo.

 

Man my goal is to hit around 380-460whp too but just like a WRX, GSX, SRT-4, Evo, and STi you're going to have to up how much AIR is going into those cylinders and the only way to do it is by upgrading what's putting the air into those cylindersweather it be a Turbo, supercharger, or both! I might be wrong on the STi and Evo but I'm pretty sure they need to upgrade their Turbos to hit 400+ otherwise they're maxing out their Turbos. But you can do cams with the stock stupercharger but I recomend waitting until you upgrade your Supercharger Whipple is what I'm going for.

 

400hp...first off you mostl ikely couldnt do it without a turbo set up...i dont kno what the stock boost is but say its 12psi, with an efficiant turbo you could make more than 205hp stock.. your best bet for 400hp would have been the 2.4eco and turbo that and hope you could make a good tune..i really dont see 400 out of the 2.0 unless a charger swap or a turbo set up...oh and if people are getting knock with the intense package, youll get knock at 400hp so idn what can be done for these cars about that, reflash idn?

 

well.. ill probably be flamed for this but **** it.. 400whp in this car... honestly.. is complete stupidity imo. There really is no need in any aspect for this lil bitty car to have that much power.. thats a deathwish waiting to happen especially if you are using this as a daily driver. There is a line of modding a car that ends at being "fun and streetable" to "stupid and unstreetable".. i have already been through this 1 time with my 88 5.0 stang.. got it at 19 and start modding, before i knew it now 4 years later the car is pushing 650rwhp and its no longer a "fun" car to enjoy on a daily basis because of how careful you have to be of managing the power..
In the cobalt.. i would be happy with 300whp and leave it be

 

Your first goal should be 300, your going to hit around 270WHP-250TQ with those mods. Your not going to hit 400 unless you do nitrous or twincharge it, why not get a diff car if you plan on wanting to hit 400, because i dont see it happening in this car without nitrous or a twincharge

 

Yeah, you will gain like 45-50 hp at most with the Intense kit. Go with the Hahn Twincharged kit. The guy on here that is installing it said it should put out 400hp (what you want).

 

Complete exhaust, header all the way back. Intake. Intense Kit. upgraded internals such as a camshaft,etc.... but you'll most likely need a turbo and some spray

 

The only way you'll get there without nitrous is take off the supercharger and add the Hahn turbo kit.

 

i agree 300 first, do intake, header, exaust, stage 3, 3 inch pulley.