ok, i cant find any good simple info on this, but i noticed my car topped out at about 115mph and around 4k rpm, it really didnt seem like it was even trying after that, i even went on a long downhill on the highway, and still it didnt top 115. just wonderin what exactly is causing this, and is there a way to take off the limiter?

Another issue i found doing my tests is that my car BBUZZZZES when around 100mph or when at high speeds with strong headwind, it sounds like a semi next to me honking. (its pretty loud) at first i thought it was the passenger wiper blade vibrating, so at around 100mph when it started i turned the wipers on, but did not stop the noise, and sounded like it was commin from under the dash inside the car.

any info is appreciated