Quote Originally Posted by SgtMarshal View Post
here is my opinion: I have an XP cam, ported heads, a full size intercooler and am running a 3.25" pulley. my car has kr when I go smaller. you will not be able to just buy one pulley and call it good, unless you are will to settle with a 3.5". you could probably run a 3.25" pulley if you did the headers 1.9 rockers and a methanol injection, but again tuning will be required.
When you say tuning, do you mean like mailing my pcu and having it reprogrammed by someone with some know-how and a list of my mods, or a tuning session with my car on a chassis dyno all afternoon?