Turbo whistle on alfa 2.4 210bhp
I had a remap by Red-dot on my car almost two years ago and it produced 240bhp and 440 lbft of torque on the rollers.
The car drove fine with no issues and pulled very strong. Early this year I took my car into an Alfa Dealer who flashed my ECU with the latest update but this update removed the Red-dot map on my car.
So I went back to Red-dot who then wrote a new map and when my car was put on the rollers it produced 239BHP and 469lbft. At this stage I noticed more pulling power but a gentle whistle when revved at low speeds and walking pace.
The question is, is this normal for a remapped car to produce some whistle.
Please can someone help me.