All the people that Tried different performance parts What gave you Noticeable power and decent HP gains. I only have the stage 2 that made a big difference. Full Exhaust Inlcuding The manifold should make a noticeable gain right? Does the 2.9 pulley make a big difference from the 3? As far as GM parts what will put me in the low 13s? I plan on going turbo the SECOND my Warranty is up. So for now what can i do? Sorry for the million and 1 questions but this is what this forum is for information.

 

Intake S2 Exhaust should get you into the 13s with 2 provisos.
1 you can drive....IE 2.2 60fters. Traction mods may be needed, ingalls ETD is good.
2 you are at a decently prepped track, that isnt at altitude.

Stage 2 is going to be your biggest noticable boost for a while.
Exhaust made a nice difference for me....noticable...but obviously not the same as S2.
a 2.9 pully has definately been the best bang for the buck boost.
noticable boost.. more than full exhaust...and only $60.

 

Thanx whats the S2 Exhaust?

 

sorry, bad punctuation.


Intake, S2, Exhaust.

 

intake, stage 2, exhaust, he means you should get all 3. Not a stage 2 exhaust.

ahh you beat me to it

 

if you plan on going turbo think about running 3" catback .. if it is for sure done deal

 

theres nothing else like cams, heads? Straight Pipe no Cats?

 

Actually, a 2.9" is smaller then the GMPP Stage 3.

Stage 2 = 3.07" = ~15.0psi
Stage 3 = 2.99" = ~15.5psi
Custom = 2.9" = ~16.5psi

If you have a custom exhaust, then your psi levels will be lower then that. Before you ask, the drop I'm talking about is what happens when you increase a roots supercharged engines ability to flow more air through it. Since more air is flowing, less air is left sitting around in your manifold and so the boost doesn't go as high. This is a good thing, since your super charger is moving the same amount of air.

 

You can get cams, but you would need HPTuners to retune for the cam change. If i were you i would drop to a 2.85" pulley, header and custom exhaust w/ high-flow cat(show a little compassion for the environment), and HPTuners and you should have a real quick balt. Thats my plan for my best friends SS/SC.

High-flow cat: $60
Magnaflow Muffler: $50
Custom 2.5" exhaust installed w/ muffler and cat: ~$200-300
Header: ~$180
2.9" or 2.85" Pulley: $60
(Optional)HPTuners: $499

Your looking at $550 for a real nice power gain and thats not including HPTuners which would net even more power with a 2.85" pulley.

 

My GM stage 3 pulley is putting out 17.5 PSI, not sure where you got 15.5?

And yes...my cat is just fine. It ran 17.5 from the day I brought it home. In fact my sateg 2 pulley pulles 15.5

 

dont you run on the stock exhaust though?
or have you upgraded now?

Intake and exhaust systems play a role in boost readings.
as does temperature and Altitude.

Not to mention the inaccuracy of the stock boost gauge.

 

Alls I have is the GM Stage 2 other then that im stock. Im looking for the next big upgrade that will give me some big gains. So right now im thinking of the full exhaust and the airbox mod for now since its easy to go back to stock when i bring it into the dealer. im not gonna get that minifold because i heard its the same as stock but just polished cant make that much of a difference ill wait and get a different perfomance header in the future when my warranty is up. Theres gotta be something more i can do to get more out of this engine.

 

obviously you value warranty, basically the answer is no.
if your worried about warranty with an intake...or an aftermarket header....then theres really no other options for you to get a HP boost equivalent to what stage 2 gave you.

 

Have the stage 2 with CAI and GMPP full exhaust with the extruded honed manifold.

Ran at the track this week which is sea level and ambient temps were 78-66 for the 6 runs.

Best run was first one at 14.25 at 97.5 mph with a 2.23 60 footer (which also was against a C5 Z06 vette which lost as he blew the launch with a 2.6 60' and couldnt catch up before the end of the 1/4 and was probably embarassed as hell). Have video of that run agaisnt the Z06.

The worst run was a 14.5 at 98.5 with a 2.3 60'. All runs were with 2.23-2.3 60 footers and shifting right at 7000 with no missed orslow shifts. Tried all sorts of different launch rpms and couldnt get better than a 2.23. After watching video it was obvious tires were spinning all through first but no wheel hopping, so could have come out softer, but that would have made for even worse times than spinning tires. Just couldnt nail a 13 period with current setup.

Am going with a 2.9 pulley to see what that does next.

 

if i get the stage 3 2.9 pulley do i need a new belt? or does the tensioner tension out tight enough? and is it easy to install?

 

Stage 2 belt will work with 2.9 pulley.

 

thanx im at 15 psi with stage 2 now if i get the gm 2.9 will i get 17?

 

There is no GM 2.9" pulley. The GM Stage 3 is pretty much 3".

And FNFAST, if it is not your cat then you have some other restriction which is causing your engine to be able to flow less air. Your car is an odd case. The numbers I listed are roughly the average with stock intake and exhaust.

 

my stage 2 pulley is 3" so how is the stage 3 3"

 

your stage 2 pully is 3.06 inches
GM stage 3 pully is 2.99 inches

 

So if i get the gm 2.99 pulley that wouldnt void my warranty since its made by gm right? As easy as it is to install do i still have to bring it to gm keep the warranty.

 

just wanted to say i love your car man. that orange over the black looks really good. nice work.

ryan.

 

As an aside point, some people are real pains in the but. Who gives negative rep for a post that just presents information. Least someone gave it a positive to balance it out.