ok guys so before i got my 06 ss/sc i never had a car with a supercharger, i recently bought a stage two pulley and it appears to bolt on however my stock pulley is a press on, am i missing a part, adapter that i need to get before i can go stage two? i know injectors etc things like that im just asking if i need to change or add something else to make this pulley work.

thanks in advance

 

depending on how many bolts your pulley has, you need the appropriate hub to press onto the supercharger before you can bolt any pulley onto it.

 

You'll need to have the stock pulley removed then have an hub thats compatible with your pulley pressed onto the shaft. The S2 pulley bolts up to the hub.


EDIT: beat me to it^^

 

yes if you have a gm stage two pulley you need the gm hub. You have to pull the stock pulley off, press on the hub and the the pulley will bolt on. and MAKE sure you have at least the gm 42 pound injectors if dropping pulley sizes

 

Cobalt & Ion ---> ZZ Performance

is this what i need?

 

yes but make sure you have the same number of bolt holes. Some pullies are made with 5 holes, and some with 4. I don't remember how many the s2 pulley has. Haven't been supercharged for awhile.

 

if you have a zzp pulley the hubs are brand specific

they have four iirc zzps hub has a five bolt

 

yup





puller/install tool

http://www.smoothflowpulleys.com/Stage2.html

 

thx bro. OP i think you pretty much have your answer. Got any other questions about going down a pulley size?

 

ill have to take a look at the pulley to see how many bolts it has, i know thats a zzp hub but i meant thats what i needed is a hub not necasarily that one.



how bad would it be if i dont have the injectors?

 

Your stock injectors are already just about maxed out from the factory. Dropping pulley sizes requires you to be able to squirt more fuel. Your stockers can't keep up. DON'T DROP TO A SMALLER PULLEY ON STOCK INJECTORS

 

the m62 3.35 pulley and stock 34# injectors leaned to 12.4afr @ 6500rpm = >80% idc

 

lol ok just asking, if i go to a stage two size on the pulley what would your recommendation be as far as size of injectors?

 

The GMS2 comes with 42.5# injectors, and IIRC you can run those down to a 2.9

 

this. If I were you, I would honestly recommend getting some 60lbs./hr injectors w/wiring harness. Those injectors will give you all the fuel you need to run a pulley as small as 2.7", which you will be wanting to do soon enough anyhow. Although, if you want to run something safely without buying any other cooling mods, just stay at a s2 pulley with 60's and you'll be fine.

 

thank you both for the recommendations, ill be looking to buy the fuel injectors first before i get the hub so im not tempted to put it on first! haha thanks again