go to the library. internet is free there and faster.

 

I'm going to be adding a kit similar to the stage 2, just not gm part/tune. My question is how well does the stage 2 run without added any cooling mods? (front mount heat exchanger,dual pass, meth kit? etc.) I was planning on getting the ZZP S3 H/E probably in a few months or so to help with cooling, but should it run fine without it for time being? Should have the stage 2 kit installed by end of month.

 

Without a tune it will run insanely rich if all your getting are the parts. gm stage 2 includes a reflash and since its original debut it has had at least 2 revisions one right away and one about a year after release.

once tuned it will run just fine without cooling mods I was one of the first to get stage 2 installed and still have it installed without any add on cooling mods

 

What exactly is done in the reflash with the stage 1 kit? and cost?
How much power can I expect?
What size is the stock pully?

 

Everyone is going to tell you to not even waste your time with the GM Stage 1. All you get is bigger injectors and a reflash. If you are out of warranty dont even bother with GM stage kits. Unless you want to keep your car for more than 150kmi then just get the S2.

 

or just actually read the thread and you can find every one of those answers.

 

The reflash is one which allows the car to compensate for the larger injectors and basically a performance tune. It is still rich when done in a stage one configuration as the reflash considers the need for an upgrade of the pulley system. Even in stage 2 the car is still a bit rich so many have upgrade their pulley system further.

 

what do you need to have for 2.9" on stage 2 safety?? tune? spark plug? cooling mod??

 

There is tons of information on this site about a 2.9" pulley & GM Stage 2. In all reality it is not a good idea, because you obtain very high IPW/IDC. Although others will argue that it is perfectly safe

 

i dont know if that statement is fully true im running my 2.9 on gmst2 injectors and havent had a problem yet

 

Well, it is true, but by the looks of your signature you are running a "custom" GM Stage tune. That def. helps. Running a 2.9 on a straight GM Stage tune will send your injectors IPW/IDC's throught the roof. Hell, with my GM Stage 3 pulley (2.99) on the GM Stage 3 tune, I'm seeing 18-19ms at 6750-7000rpm & 21ms at 7250rpm. Those PW say my injectors are maxed out well passed their limits. I can only imagine what a 2.9 would do, but then again a lot depends on where you live. Dif. elevations will have dif. effects on your car.

 

from what i have heard that gm stage tune is rich enough u can run 2.9 good but he says in his question if he should get a tune....so yes if he gets a custom tune he shouldnt have no issue

 

ok get a hptune its a good idea and waht you put for cooling mod and spark plug???

 

This is is the excuse many people on this site have to make them feel better about running a 2.9 on a GM Stage Tune. I'm telling you it's not a good idea, and most tuners/ people that log theirs cars will back me up. I guarentee most people that are running a 2.9 on a non modified GM Stage Tune have IPW/IDC's that are off the charts. It doesnt matter if the tune is "Rich". You are still going to over work your injectors. I bet you didn't know that there are diff. versions of the GM Stage Tune. Some are leaner than others. When I had the GM Stage Tune, I had the late 07' revision, and the A/F ratio was 10.8. That's still rich, but leaner than some of the earlier versions of the tune.

Stoon: You have a custom tune, or customized GM Stage Tune. That's why your car is ok, but for someone else without a modified GM Stage Tune, the 2.9 is not a good idea.

To the people that don't believe me, or to the people that say it's safe .... it's not, but go ahead, it's your car not mine.

 

very true the idc i think will be way high and yeah mines fulll custom tuned

 

ok for the tune but about cooling mod and spark plug what to you do?

 

right now i dont have any cooling mods which i dont like u should get h/e,daulpass,meth injection,step 1 plugs

 

i am running stock on my 05 ss/sc balt right now, and although i know hardly anything about cars, i have to say ive crammed a lotta info in the past week to get parts for my car...

heres what i just purchased...
zzp stg3 w/ 2.8" + s3 h/e
https://www.zzperformance.com/cobalt...1055&catid=143

dual pass intercooling w/ option B (for easy bleeding)
https://www.zzperformance.com/cobalt...=855&catid=178

3" downpipe w/o cat
http://www.zzperformance.com/cobalt_...=542&catid=155

3" hahn catback
http://www.turbotechracing.com/produ...dcategory=5617

hahn performance headers
http://www.turbotechracing.com/produ...dcategory=5617

injen CAI
(just purchased one off ebay ;D)

while i wait for the parts to arrive, i must find me a good tuner nearby, which may be a bit of a problem heh

 

I bought my SS/SC used last spring and I noticed that the boost goes up to 12.5 when I really step on the gas. Is this a sign that my car already has the stage 1 kit on it, if so how could I tell?

 

im pretty sure 12.5 is stock and 14 is stage 1/2

 

12.5 is stock

 

I just read the last few pages of the this thread, and it is question after question. If people would read from the beginning of this thread, all their questions would be answered. I am by no means trying to be an *******, but people need to do a little research of their own.

Cliff Notes (common answers to questions):

What comes with a GM Stage kit ?:

-GM Stage 1 = 42 lb/hr injectors & tune
-GM Stage 2 = 77.9mm pulley, hub, shorter belt, 42 lb/hr injectors, & tune (same as GM Stage 1 tune)
-GM Stage 3 = 76mm pulley, new pcm/tune, dual pass endplate, & uses injectors from GM Stage 1/2, & hub from GM Stage 2.

Are GM Stage kits covered under warrenty ?:

-GM Stage 1/2 are covered under warrenty. GM Stage 3 is for off road use only (no warrenty).

How much boost do the GM Stage kits make ?:

-GM Stage 1 = 12.5psi (same as stock)
-GM Stage 2 = 15psi (on avg.)
-GM Stage 3 = 15.5-16psi (on avg.)

How much horsepower do the GM Stage kits produce ?:

-GM Stage 1 = 236hp & 205tq
-GM Stage 2 = 241hp & 218tq
-GM Stage 3 = 248hp & 260hp w/ 100 octane & 310hp w/ nitrous

*All GM Stage kits can/will make further power with the addition of supporting mods ie. intake, exhaust, cooling.

How much quicker will my GM Stage car be ?:

-GM Stage 1 = 0.3 sec quicker in the 1/4 mile than a stock SS/SC
-GM Stage 2 = 0.7 sec quicker in the 1/4 mile, & 0.5 quicker to 60 mph than a stock SS/SC
-GM Stage 3 = No numbers from GM, but I have managed 0-60 mph in 5.2 sec, but I'm also fully bolted. A standard GM Stage 3 car would prob. knock a tenth or two off of the GM Stage 2 1/4 mile times, and prob. be a tenth quicker to 60 mph on 93 octane mode. On high octane mode or nitrous, it would be much, much quicker.

 

Ok thanks cause I had seen someone say 12.5 was stage 1 and had heard that 10 is stock. Sorry if i skipped over reading those figures. I had been a honda guy before I got this car so I'm learning as I go and this site has really helped me.

 

good recap man, this thread wouldnt be 1000000 pages long if people read the first one lol

 

I hear ya man .... Thanks. Yeah, I saw you answering all the questions on here. I figured I would cut you some slack from the Newb's, haha.