Ok well i have now got around to installing my nos kit on my car and have my timing at 12 with a 125 shot and everytime i spray it it hit good then feels like its starts breaking up real bad but it doesnt really sound like detonation it doesnt have that pinging sound to it. does anybody have any ideas i have never had this issue with nos befor. i thought about maybe upping my fp its all ready at 45 . car has aluminum heads systemaxintake and a tfs1 cam tbody and all the bolt ons really. Allso does any body know where i can get a jet chart for the nos super powershot sysetm so i can make sure i have the rite jets