I read somewhere in another person's thread the other day about the 2.9 pulley being pretty BA if tuned properly for it. So that brings me to what stage kit is the better one to purchase. I have a 2007 SS/SC with a ZZP 3" CAI and the rest is factory. I'm not looking to go to crazy on it right now...my plans are Stage kit full 3" Hahn exhaust OTT rotated trans mounts and prob Ingalls TD and probably a Custom tune once I get all that stuff done so its tuned for everything at that point. Any help is appreciated. Thank you. =D

 

just get a 2.8, its the smallest pulley you can run without machining the blower. Also make sure you get the heat exhanger, and no ingalls TD most people would agree the trans mounts are much superior.

custom tune would be areally good idea as well

 

Ah ok. I kind of planned on running a 2.8 or 2.7 pulley depending....but if I have to do any machine work below a 2.8 I don't really care for that. I do plan on getting a H/E, is the OTTP one good or is the ZZP S3 better? Also I would be getting Dual pass with Option B, unless that Single pass that just came out would be a better choice. Ya a custom tune will be getting performed once I get everything on so I get the maximum possible out of everything.

 

Machining the blower? What do you mean? I haven't read anything about having to do anything to the blower...just that you might spin it out of efficiency if you don't have supporting mods

 

Wrong. I'm running a 2.7, snout isn't machined. Depends on what pulley system you use. Smoothflow fits just fine.

 

oh, nvm then. Maybe its with the stage 2 hub?

Just so you don't think im pulling stuff out my ass look at the description under the snout machining tool
http://www.zzperformance.com/cobalt_...cts.php?id=142

"ZZP snout machining tool (In Stock - 01/31/2006)
Turn down your snout to run sub 2.8" pulleys!"

 

Yea, I know that's what you were referring to, like I said I'm pretty sure it just depends what pulley system you run. (some are thicker than others)

To make it even more confusing, they say a different number on their pulley page.
http://www.zzperformance.com/cobalt_...=446&catid=142
"ZZPerformance pulleys do not require snout machining. By developing Ecotech specific pulleys we run all the way down to 2.7" w/o snout machining."

 

maybe they took the description from the grandprix / m90 page???