notkool59
Go Kart Champion
Pretty much as the title states, I got the apr stage 1 flash about a week ago, love it by the way. Anyway I noticed that at peak boost in 3rd and 4th gear that there is a high pitched whistle/whirling noise that accompanies the induction noise of the turbo. Just curious if this is normal or not, everything else on the car is stock. I don't feel a drop in power, there is just that noise, and since this is my first car with a turbo, I am not sure if this is normal or not. Thanks for your help! :thumbsup: