Go to www.crateenginedepot.com and click on cobalt performance parts. You can get the kit fro about 625.

 

man i really need to get stage 2 i keep putting it off...

 

So with a 2.85 pulley what gains will i see (whp, wtq) and will i need to have it tuned.

Will there be any problems with my 42lbs injectors with added boost?

sorry about all the questions...New to tuning game.

 

Nate made a 2.85 for me. This works well with the Stage II. He does really nice work.

 

Buck

what gains are you seeing. whp, wtq ect.

Cheers

Nate/Buck

How did you pay for this pulley. I have never used e-bay or paypal. I just set up accounts for both but not sure on the process to pay nate.

thanks

 

i payed cost for the stage 2 with was 570,.....my sister works for chevy

 

Time for a new dealer. I paid ~600 for the kit from Crate Engine Depot, and 200 for the install. 700 in labor is rape, and they should be prosecuted.
800 for the parts is $50 over list, I wouldnt ever show my face in that dealer again for how much they want to rip you a new one.

 

2.85" pulley is perfectly fine. Your Injectors can handle a 2.8" so you have that little safety cushion.

You would want your engine tuned anyways, because if you are running the GM stage2 tune, then you are running on a crappy tune. I have retuned many Stage2's. One went from a Consistant 14.20 sec 1/4 mile all the way down to a 13.80. The Stage 2 tune is limiting still that's why they came out with stage 3 basically.

 

Psykostevo

Why is it limiting on GM stage 2 tune. Could you explain.

Thanks

 

Kaisoboy, my boost seems to be between 17 to 18 psi depending on weather. I'm still on the 42 lb injectors with colder plugs. I don't see any problems of leaning the motor out. Also, take into consideration that I live in the deep south and engine's seem to be able to take more on the lean side due to the climate. I used paypal. Nate set me up with this. Don't really know how much in the power levels, but there is a "seat of the pants" difference in the pull at higher rpm's. Give it a shot.

 

The GM stage 2 tune has a few problems. It knocks like a POS, which pulls your timing. It leaves a couple hundred RPM's unuseable. It is not tuned for intakes if you have one. The AFR under Power Enrichment is lean under most conditions. It does not take into account varying Octane levels for Premium fuel throughout the country (Hence the cause of more knock). The Cranking VE and MAF are not calibrated to the <3.0" pulleys. Most of the time you are running around with only 90% max boost. It does nothing for the fans to help combat engine compartment heat. You have to wait for a good PE until ~4000 RPMs, when the smaller pulleys can throw up 15PSI well below that, making the Lower RPMs lean and resulting in less Torque under WOT.

There are a few other differences, and some of you may disagree with my opinions, but I have successfully tuned the Fastest Cobalts in my State. And AZ is a hard place to get good track times at, despite having National Facilities here. The heat is outrageous in the summer. Most of the time we race in 103* weather at 10pm.

 

for some reason that doesnt seem very believable 103 at 10pm whats your high for the day 135 i bet its 90 at 10 pm maybe 85 but 103 im hard pressed to believe that

 

I'm in dallas and it can be 90-95 at 10 here in the summer... Phoenix is alot hotter too. and I bet they scrape 115 or 120 in the summer there

 

He's not BS'ing. I've been to Lake Havasu City, AZ in August and it doesn't drop below 100*F all night.
Highs during the day were around 115-118.

 

In the summer the Temp NEVER drops below 100 on a normal day, middle of the night or not. And then you go on an Asphalt track where Air Intake 1 Temps are 120+. The car goes into a retarded mode and pulls power at that high of intake temps.

Read 'em and Weep! Here is my Gauge Cluster from a run at about 10:30pm in the end of May 2006. Sorry for the blurry image it was hard to take a picture with my phone while getting ready to shift to 5th.

 

Damn son, wheres that stretch of road at? 140 is pretty damn fast
Yeah, here in dallas, there are nights where it doesnt get under 95*, and we're not in a desert

 

Thanks for all the info Nate, Buck and Psykostevo.

I purchased the 2.85" today. Once I get it I will get a retune. Is the stage 3 tune a good tune and can you get the dealer to reflash or is it better to get a tuner shop to do it.

 

THE PCM must be replaced for the GM Stage 3 tune. And it voids your warranty.