Yosh! Because I'm a poor bastard but work at a Dealership it was easier for me to AR a GMS1 kit instead of buying HP Tuners and finding someone in my area to tune it. So with that said next week sometime I'll be getting the GMS1 kit installed and the reflash done. I only have a K&N CIA on my car at the moment and the Catless Downpipe from ZZP sitting in my garage. What kind of power gains should I be expecting and what boost numbers do you think I would be putting out.

2009 Cobalt SS/TC || 74k Miles

 

This is very easily searched for but il throw you a bone.
Make sure you buy the adapter harness from crate engine depot so they don't have to cut your harness. It will save you allot of issues down the road! Plus you can always go back to stock without problems.

I put down 282whp torque figure was skewed but based on averages I should have put down about 310-320wtq

My mods were k&n Sri 3"catted dp and gms1 at the time.

Also make sure the dealer uses the correct o rings as the ones that come on the sensor need to be changed. And a tab needs to be cut off on the lower sensor.

 

Since no cars are on warranty any more I would just get the ZZP PCM tune and buy the sensors from crate engine depot. Better tune more power and you wouldn't need to buy hpt.

 

Why not just buy the sensors from zzp they only sell the plug and play gms1 sensors?

 

Or this

 

I put down 286whp and 308wtq on my Stg1 with K&N SRI. Everywhere in Wa, I pretty much get 20psi. Occasionally, if conditions are right, it'll jump to about 22-23psi, and once I saw about 25-26psi, but 99/100 times, it boosts 20. Unfortunately, mods don't really do anything for factory or GMS1, as they have the learn down.

 

GMS1 removes the learn down fyi.

 

Or at least makes it a bit more lenient.

Gms1 cars with no bolt ons usually put down about 271-275whp 295-300wtq dp and k&n are usually good for about 10-15whp and wtq gain.

 

Huh, Everything I've read said that STG1 still had the learndown.

 

Everything I read said it's removed.

Also, read this below:

http://www.crateenginedepot.com/1921...70-P17741.aspx

 

I stand corrected...

 

It's not that the learn down is entirely not present the engine tuning doesn't work that way. It just allows more leniency on the desired hp output so it doesn't lock it down when it senses more flow. It will still cut it off at some point. It just won't cut boost as early to make up for additional airflow.