Dangerous 550 fuel starvation in cornering

[wyo550]

Has anyone who owns a 550 or 575 had this problem:

When the fuel tank is 1/2 or lower, the car suddenly starves for fuel when going around a corner in an intersection or around a moderately-tight corner on the highway. Moments after the cornering is complete, the engine suddenly comes back to full power.

Work-to-date to correct the problem:
There are two small reservoirs within the 550's fuel tank that are designed to hold fuel during cornering. The fuel pumps sit in these reservoirs and the idea is that- even if the larger fuel tank is depleted by sloshing- these reservoirs hold enough fuel for the pumps to feed from. Sealing these reservoirs are rubber elements which are known to disintegrate and clog fuel lines and destroy pumps if the bits of rubber are not removed and the seals replaced.

OK, so we pulled the tank, pulled the reservoirs and replaced the rubber seals...and the problem not only continues...now the car stalls when going in a straight line and the tank is only 1/4 full!

Has anyone else had similar problems and possibly found that there are sensors within the tank that cause this starvation?

The current situation is dangerous- seriously dangerous- as the cut-out of power ALWAYS occurs when entering a highway from a curved on-ramp! Just as you NEED acceleration and complete control of the car's performance...it's giving you 6 cylinders of power...then suddenly all 12!

If the tank is FULL...NO PROBLEM.
1/2 full: Cornering is a problem.
1/4 full: Going up a steep hill is a problem!

Thank you for your time and help.
Otherwise, the car (with prototype tuned exhaust) is working wonderfully, with apx 10% increase in both mid-range torque and horsepower evident. I'm eating up rear tires and buying them now in 6's, getting only about 5,000 miles on a set of rears! The torque is so powerful, I broke the welds on both of the prototype cats coming home from the USGP in Indianapolis in June!
Here's a video of what the exhaust sounds and performs (ie wheel spin) like
http://www.laserradio.com/tuned550.rm

[trev0006]

This can't be a common problem.

[Racer86]

Might be the electronic stability controls and, or, its software. This is what the F430 was doing to me at VIR track day. And you bet, it can be dangerious. A ZO 6 Vette very nearly hit the back end of the 430, as the 430 computer did not allow throttle, leaving the apex until (I guess) the front tires were turning the same rpm. It seems like most owners don't experience this, but if they were to drive the car at a true race limit, I think this system is very unsafe.