How much hp gain should I expect if I switch to the 3.12 pulley? Are there ANY issues with this pulley (slippage, fitment, etc)? Also, what size belt do I need and what do I need to take the 3.33 pulley off? Any info would be appreciated

 

You need to loosen the top 3 bolts on the blower , that hold it to the bracket . Pry the blower over far enough to get the 3.33 pulley off . You need a 93 inch belt . I suggest the Gates belt , thicker , stronger , less slipping . You will gain 20 to 40 hp and 1 to 1 1/2 psi . You'll need to retune afterwards

 

is that hp gain to the wheels? if so, that is more than what i would have guessed? also, how does the car feel after the switch? is the power increase noticable stronger/faster?

 

Booger... I'm getting ready to make this swap myself. Would it be easier to remove the jack shaft pulley assembly than take the SC loose as you suggest?

I was looking at it over the weekend and it appears as if you can remove both front and back jack shaft pulleys, then remove the 4 allen head bolts to remove the entire pulley assembly. Then, swap the 3.12" for the 3.33" and remount.

 

Another belt you might want to consider from Checker is the:
Dayco "Poly Cog"
# 5060930
6PK2375

 

Hey SungNamZ I think my cog belt is too lose again!

 

Give me a call! Take the necessary tools to work or come by the house we will check it out!

 

I have never considered doing it that way . I would have to look at it before I would comment on it . Just thinking about it though...I dont see why it wouldnt be doable

 

After you have the 3.12 on....going to the 2.87 is no problem . 3.12 comes off with out any problems