lvd1102

ok right now i have a 3.875" and a UR FMIC and im netting around 6psi. Now i want to up my boost to net about 9-10 psi. just wondering what size pulley i would need. i was reading the SOS website and it says that a 3.6" is a 9lb pulley. I thought that a 3.875 was a 9lb pulley.
So assuming that my 3.875" pulley is a 9lb pulley im losing 3psi from the fmic. so i would need a 12-13 psi pulley. would that be a 3" or a 3.2"

s2kadrenalin

Ap1? AP2? Need more details.

lvd1102

sorry ap1 with the novi 1000

RAIN H8R

you are correct. a 3.2 will net around 9 or 10 psi. Thats where I was at until I traded a local my UR FMIC for the COMPTECH Aftercooler. Now Im at 11/12psi with A LOT more power.

myflys2k

i have 4" pulley on ap1 with comptech aftercooler and i get anywhere from 7-8 on my boost gauge depending on the air temperature.