Ok, now onto the issue. It's a 2000 Infiniti I30(auto, in case it wasn't obvious) with 142k miles on it. The noise begins once the car is under a moderate to heavy load under acceleration, usually between 30-40mph up to 60-70mph and usually is most consistent around half throttle. The noise sounds like it's coming from the passenger side front of the vehicle around the floorboard area, and sounds like a roaring/scrubbing noise. It roars almost consistently under load and the scrubbing seems to happen over bumps, the scrubbing almost sounds like the tire rubbing the inner fender but it isn't as far as I can tell. Here's what has been done in the past year: New bank 1 pre-cat, 2 new 02 sensors, both CV axles, outer tie rod ends, new pads and rotors on the front, 4 wheel alignment, fixed broken exhaust mount, new tires. They have also checked the wheel bearings and said that they were fine. I have inspected the struts and they seem fine as well.
When I first bought the car it was making the noise but it sounded closer to a light knocking noise under load, but now the roaring'/scrubbing noise has combined with that and is starting to worry me more. I've had the car for almost 3 years now and it never has caused any issues with the way it drives at all. It drives normal and shifts perfect so i'm still at a loss, I have been trying to not worry about it so much, since it's been this long, but it still drives me nuts because I can't figure out what it is
Any insight on this would be great, if I can't find out anything soon then I guess I will quit worrying about it.