drailSS

i will be geting some pistons. i didnt plan on going crazy. might put like a 75 shot. probally be around 340-370whp. the question is will the stock cams hold up to the nos.

Mikey851

Are you asking if the stock cams will suffice to make good power or are you talking about reliability?

CTORANGESC

I think he is talking about reliability, They will hold up

drailSS

reliability. sorry also i will running 10:1 pistons. but it should make that big of a difference. thanks

NJHK

I don't see why they wouldn't "hold up".

It's not like you're going to break your camshafts or something. It's all about if the camshafts are going to be your "bottleneck" in your valvetrain system as far as bringing air flow (pushing on the valves to allow airflow to enter) in for maximized power.

No, you should be fine.

You're not keeping the M62 are you?

Mikey851

Yeah if you're talking about reliability it's perfectly fine; it's not as if you're going to increase your redline above 7000, and if you would do that then you would need to start looking at valvetrain modification although the cams would still be fine as long as they recieve enough lubrication.

drailSS

yes im keeping the m62 for now untill i plan on going full turbo. but untill then m62 it is. im not planning on raising the rev. over 7000 so everything should be fine. thanks

NJHK

Honestly...

If your ultimate plan is to go full turbo, don't raise the compression...you're just making it tougher for yourself.

Focus all your money and energy in the turbo setup because that's not going to be a extremely cheap and easy change.

Ricklmesa

what type of internals does the cobalt SS/supercharged come with? Gotta come with something if they warrenty a blower lol Im new here and just want to learn a few things about the car.

NJHK

Cast.

It's a decent motor. I don't know what exactly you're looking to know about the car.

Ricklmesa

Like whats the difference between the the 2.4l internals and your 2.0l internals? They don't have different/stronger rods/pistons or anything to hold up with the supercharger? Just a stock motor with a blower with a warrenty? If thats so why don't more people just blow out the bigger motor? Like the evo's and sti's they basically have somewhat of a built motor already for them to warrenty the car with boost. Just want to know what stuff the motor has.

Mikey851

The engine has a forged steel crankshaft and rods. The pistons are Hypereutectic; this is why they are the weak point. Almost all hypereutectic pistons are good until somewhere around 300HP.

Ricklmesa

Ok. Yeah I think the pistons im my car are hypereutectic also.

Onyxd04Redline

You're going turbo and you plan on raising compression? It's time to DROP it alittle for the turbo.

Ricklmesa

Do the colbalts have a BOV stock? One that u can hear outside the car? Or can u modifiy it to have one? Cause I heard one on a cobalt that lives near me and it made me think turbo. Roots style blower usually don't have those yeah?

Ricklmesa

No need to be so harsh man.

Mikey851

Don't worry man. It's just the question you just asked gets asked on a regular basis and there are probably ALOT of threads you could find the answer on even if you just typed "BOV" into the search field.

No we don't have, nor do we need a BOV. If you heard a blow off valve on a Cobalt, then that Cobalt was either turbocharged or procharged (Centrifugal) because they can experience boost surge.

NJHK

2.4L motor is 10.4:1 compression and was designed to be a naturally aspirated motor. GM so far only likes to boost smaller displacement engines...not that a 2.4L is huge but still.

The motor can take a good amount of stress. There really isn't a magical number to tell you or anything but warranty wise (engine), if you try and do anything on your own to make exponential amount of power, your warranty is good as gone.