i am new to the cobalt ss i have a 06' ss/sc how small of a pulley can i put on a stock blower with supporting mods as in exhaust, cai, 60# injectors, plugs and custom dyno tune. Like i said i am new to this i have had around 14 mustangs, 4 camaros and couple other cars but wanted a change. thanks...

 

they sell them down to 2.5".

most people recomend for anything 2.9 or below to add some additional cooling mods like a heat exchanger, or meth injection. some have run without the cooling mods and have not had problems, but you'll get more power and more reliability with the extra cooling.

 

You can go a 2.6 or 2.5 i believe with all cooling mods...i wouldnt go under a 2.7 just so that your car can still be very dependable

 

with no cooling mods dont go below a 2.8 inch pulley. 2.7 is really as low as you ever want to go anyway...thats when the blower exceeds its efficiency

 

you could run a 2.9 with that setup. but your next mod should be atleast a heat exchanger

 

ok you can go as low as a 2.5" pulley..

HOWEVER

this is a roots type supercharger. It heat soaks like a mother and it becomes counterproductive. IMO, I wouldn't go lower than a 2.8, MAYBE a 2.7. anything past a 2.7 is just dumb.

However, if you go 2.7 or 2.8, you'd better run 60's and just about every other cooling mod you can get to make use of it

 

thanks for everything guys this is probaly the best forum site i have ever been on, again thanks for all the help...