Is something that would be a good mod for my 2.2? Anyone have this specific one or any experiences? Is it crazy hard to install? I'm rather mechanically inclined.

5 ribs - Ecotec Lightweight Crank Pulley - 2.0LNF/2.2/2.4: by Make and Model - Chevrolet - Cobalt - 5 ribs Ecotec Lightweight Crank - Car Performance Parts And Auto Accessories | MRZ Performance

And what about an alternator pulley?
http://mrzperformance.vstore.ca/prod...roducts_id/150

 

bump, anyone?

 

No. crank pullys=bad idea. I'll let someone else explain more in depth.

 

theres many threads on this, lots of people have lots of different opinions..... just sayin'

 

Underdrive pulleys are bad for the Ecotec motors. It all comes down to balance. The stock "pulley" is more than just a pulley... its a harmonic balancer. It dampens and smooths out the harmonics, or vibrations, that the engine produces as it's running. Allowing these harmonics and vibrations to go uncontrolled WILL damage your engine.

All Ecotecs are Internally Balanced (Crank, Rods, Pistons), but the flywheel needs a harmonic balancer on the other end. And the lighter the flywheel, the heavier the other end needs to be. Best to leave it alone or go with the ATI Harmonic Balancer. GM Racing found this out the hard way when they were testing and developing the Cobalt Race Teams.

 

Alright, thanks for the info guys. - Any other mods I could do that are relatively easy? I'm not looking for insane horsepower or taking it to the track, just a little get up and go.

 

i did crank, alt and flywheel and i dont regret it.

 

Maybe not yet...
lulz

and OP, get a exhaust, or a header.

 

Exactly. Its not an overnight process.

 

Did you notice a big improvement? how long have you had it on the car for? how hard was it all to install?

 

I was looking at the Tsudo exhaust. I like the sound it gives the 2.2... It's either that, or just getting a Magnaflow muffler and a resonator delete.

 

except your not supercharged......

 

^ Nah man save up your money and get the real thing. Just my two cents.

Neither is the op.

 

****! well then you guys should be good to go! I don't think it should be a problem because you have less stress on the crank anyhow.

 

False, Lightweight crank pulley's are fine. It's the underdrive pulleys you don't want.

 

Tell that to the dudes who went boom.

 

how can you say this caused it? im sure it wasnt his only mod

 

Ohh okay fine, css wins. It was just my 2 cents, since ive seen a few threads about how this **** **** up. and i have a crank pully here from a year ago, and when i posted something about puttn it on, css went crazy and said NOOO.

 

I've had a lightweight alternator pulley and light weight crank pulley on for over 2 years now. No boom.
I've never heard of these persons who've gone boom either... Proof?

 

you really can't even go by hearsay on this forum anymore because the majority is age is 16-19 and we all know how much knowledge they consist of

-putting **** on incorrectly
-blatantly lying because they think it's cool?
-beating the **** out of their cars

there is only a few members that I take advice from, others I take with a grain of salt..

 

its so true tho, so many people just believe whats thrown around on here, its rediculous what i come across and dont even bother wasting my time bc i know ill get the "your a ricer" comment back that makes no sense lol

 

So I guess i'm leaning back towards a crank pulley/alt pulley! haha anyone have experience with the MRZPerformance ones? are there others that I'm not aware of?

 

False. The stock Harmonic Balancer should only be replaced with ANOTHER Harmonic Balancer.

High RPM's are what will cause the most stress... that's when the most vibrations will be present. If all you ever do is putt around... you probably won't run into any problem soon. There is no time table for when your motor will tear itself apart. But I guarantee you that you ARE damaging your motor. The vibrations WILL harm things.

I get my info on this from an insider. You can either listen to it... or not. Your choice. But he was very instrumental in the development of the Race Teams and the Time Attack Car. They nuked a couple motor in that development... the only thing that changed to prevent the motors from failing was the Harmonic Balancer/lightweight flywheel combo. See my first post in this thread.

 

huge improvement from the flywheel. faster rpm

flywheel and crank has 100000km+
alternator is 80000km.

flywheel is a too hard to me to install
crank is a good job.
alternator is easy. the belt is hard to removed .

 

The only thing that's being changed is the rotational mass. It's still the same size so I guess I don't understand how that could make a difference. The harmonic balancer is still present without the stock pulley.