Quick question being new to the site and having a supercharged cobalt, I already have gotten used to the stock power on my ss. To upgrade to stage 2 do I use the already existing supercharger just add a smaller pulley? I know about tuning mods and the bigger fuel injectors.

 

gm stage 2 comes with smaller pulley for the supercharger, injectors, smaller belt, and a gm tune. your better off getting the OTT stage one tho, more power less money. Also the search button is a great tool :

 

Question was, if it's on the same stock supercharger?

 

sure is

 

yes its on the same supercharger just smaller pully smaller belt bigger injectors and tune

 

https://www.cobaltss.net/forums/2-0l-lsj-performance-tech-47/gm-stage-kits-faqs-read-me-first-16806/
there ya go

 

Same supercharger...any ideas on max boost with stock supercharger

 

Im pushing about 17lbs of boost on my stage 2. Gm says any smaller pulley will need upgrades to the cooling system due to heat.

 

Did they say specifically what type of upgrades? I'm getting ready to upgrade to 2.6 pulley, 60s, and ecu reprogram.

 

you need to get meth, Heatexchanger, dual pass, option b, etc, etc. a 2.6 will make alot of heat