Procharger pully upgrade?

[lostsoul]

I have the reg procharger kit and want to juice it up a little to 11-12 psi.. The stock come with a 4.00 and I heard they have a 4.25 (10-11psi). so I need a 4.50 I think.. Does anyone know of other places that sales the pullys?

--thanks

 

[fin1]

I have the reg procharger kit and want to juice it up a little to 11-12 psi.. The stock come with a 4.00 and I heard they have a 4.25 (10-11psi). so I need a 4.50 I think.. Does anyone know of other places that sales the pullys?

--thanks

Last I heard from ATI, was the 4.25" = 8-9psi & the 4.00" = 10-11psi. Mine came with the 4.25 and I've had it upgrade to 4.00 since then. I'm pushing 10.5psi now @ 6500 rpm.

If you go with a smaller pulley don't forget the belt.

Are you planning on re-tuning? What about MAF & fuel issues? Did you address these already? Be careful in how hard you push your stock motor with the additional boost.

Speaking from experience, the MAF and fuel pump will not keep up with the added boost and will push you lean. I had my fuel system re-wired, a MAF extender installed and a BAP installed along with a custom tune.

 

[lostsoul]

haha.. I think I got it reviresed.. like most things in my life.. I'm getting the kb bap soon.. and I have the "mafextender" sitting on the floor. I dont know why its hard to find a pully. I will have someone install the stuff for me and re-do the wiring like you told me about last time. it should be good for 11-12 psi.. I think.. ATI never did get to me about their 650rwhp stock mustang =-/ .. also I need to do the plugs.. did you gap yours yet? soo much to do still.. I'm doing a little at a time.

 

[fin1]

also I need to do the plugs.. did you gap yours yet?

No and I don't plan to at this time. My next power add will come with a new bottom end but that's a different story and will require wife approval, which will take time.