which Jun cams do u have? JUN 3? Anyway JUN's like Spoon's cams are made for NA application as well, which you can't use on a turbocharged car. If you are going to put nitrous in your car, the cams won't be an issue as long as u have the proper tunning and fuel delivery. On my car I have the Spoon TB, Skunk2 stage 2 cams (which are a lil more powerfull than the jun3) skunk 2 vavle train, srp 10.5:1 cr, mugen head gasket, eagle rods, eagle light weight crankshaft, and all thebasic bolt on's, and AEM EMS, and rc 270cc injectors. Right now i am NA and i am running 13.5 all night long on street tires, with a 75 shot and a bigger fuel pump i ll be in the 12's easy. So basicly if u are going to use jun 3 cams, turbo is a no no, but nitrous will be no problem, and don't forget to check the vavle to piston clearance with those cams!!