High g-force racket

[alfasteve]

Hi folks, I have a new issue with my '99 Boxster. I can recreate the issue as follows. If I go to a big dry parking lot and go around in big 360's as the speed and G-forces increase the car will start to have a 'fouling' or interference sound coming from what I think is the rear. If I turn the wheel sharper the sound (severity) immediately increases. So, higher G-forces cause it. I thought it might be a bad CV joint on a rear axle so I replaced the passenger side axle with (hopefully) good used one. No effect at all. It makes the sound turning left or right. I discovered it while driving on my fave twisty road (Angeles Crest Hwy around LA). I haven't a clue what it could be. Wheel bearings feel fine. Car has 102k miles. Manual transmission. Any thoughts?

[mikefocke]

Done anything to the oil pan? Baffles? Deep sump pan? All that oil sloshing to one side in a 360 can't be good. Just ask those who race the cars.

[alfasteve]

Hello there,

No I haven't done anything to the oil pan, nor do I drive in 360's! I was describing how to replicate the problem hypothetically. I discovered the sound on my local twisty roads. No sustained g-forces for very long. I've campaigned 3 race cars. This is my street car, it's stock, no mods.

I'm thinking it has to be wheel bearings.

Thank you,

Steve S.
Los Angeles