This chip(pic)was in my car when I bought it. I now have a Red Armstrong chip 17lb - 93 octane chip. Reds chip worked OK until 93 became extinct here and I have been getting knock ever since. I turned the boost down to 14 lbs and still getting knock. Does the chip in the pic have more,less, or same timing as Reds? Should I just put the stock GM in it instead? I am buying bigger injectors and a new chip later, so I hate to get another chip at this point! 
