You can read my sig for my swap and mods. Im running a chipped pr3 with a mugen knock of program and the thing runs stupid rich. My question is i have a chipped pr4 with removed rev limit. Along with dyno time and propper tunning should i run that along with a Vafc for vtec and fuel settings? My reason for wanting to run the pr4 is it doesnt look for a knock sensor, or a second o2. Thanks in advance for your help.