GrabberblueS197
forum member
Im asking this question for a friend if mine, We recently added a 2.6 pulley to my friends 2011 GT500 and also added an idler pulley. Car feels strong but is going into limp mode (I think) when hes hits full boost which is at about 12lbs right now. The car seems like it just shuts off, drops boost then comes back up. It seems like belt slippage but we did some research and everyone seems to be saying that a smaller belt is not necessary. So what do u guys think should we go for a smaller belt or is there some other issue going on. The car has a jlt cai, ngk plugs, pulley, idler and a john lund box tune. Any ideas of what it could be? thanks in advance