I can't belive we don't have a thread where everyone posts their mods and dynos so I guess I will go ahead and kick this one off. Here is my dyno and mods, soon to change. Crappy GM stage 2 tune, super rich!

GM Stage II
Polished Injen CAI/Dry Charger
NGK BKR7E Copper Plugs (.40Gap)
242whp and 212wtq

 

Just get a smaller pulley. That'll fix your A/F Ratios.

 

thats what my stock dyno looked like with the air box mod... I can't wait to get it up on there soon. with these mods

 

These are the mods to come. That should help things out nicely.

CA 2.79" pulley
XTC Downpipe w/high flow cat
GMPP manifold
GM Performance Exhaust
A nice tune by Cobalt Addiction

 

At the time, I had:

Injen CAI
Vector Tune

 

hey is that exhaust the gmpp exhaust that is 2.5 inch diameter? whats the diameter on it?

 

GMPP exhaust is 2.25"

Thanks for posting a dyno JohnyNFullEffect! We need more dynos.

 

i thought GMPP was 2.5 inch?

 

Negative my friend it's 2.25"

The stock exhaust of a SS/SC is 2.5" but very restrictive.
The GMPP exhaust is 2.25" and very free flowing.
That 2.25" is going to help us keep low end power and torque.
So in other words even though it's 2.25" it way out performs stock exhaust.
Not to mention it is not raspy at all and that is huge for a 4 cylinder.

 

nope 2 1/4 catback

 

Good to know. Thanks for clearing that up for me!

 

and its true that you can use the gmpp exhaust on the 2.2 ecotec cobalt ls? right?

 

Yeah absolutely.

 

ight then. im prolly gonna order it within the week

 

They are doing a group buy right now.
It's only good through Sunday! Here it is.

https://www.cobaltss.net/forums/crate-engine-depot-87/gmpp-cat-back-performance-exhaust-special-32632/

 

here are my stock vs gmpp catback runs:
https://www.cobaltss.net/forums/dyno-results-170/my-gmpp-catback-dyno-results-32554/