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Fuel cut occurs when the ECU sees entirely too much air compared to the amount of fuel it thinks it is delivering. It then tells you by doing something that results in the car feeling like it just dropped the motor out of the car. It feels like you hit a huge pothole while going 100mph, as said before, it would be hard to not bite the steering wheel.
You may just be knocking so hard(probably due to boost creep, what kind of exhaust/o2 housing are you using?) at that RPM that the ECU is pulling a shitload of timing and it feels like your car isn't going anywhere when it should be. My car does that due to a bad knock sensor, I can watch my knock count max out randomly while cruising and if I stomp on it just for giggles, I can hit 17psi and feel like I barely even put it down.
Get a boost gauge, controller, datalogger, and make sure your plugs are good and gapped properly and only run premium 92 octane, unless you hate your pistons.
Hope this helps.
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1992 Eagle Talon TSi AWD
320awhp/320lb-ft tq
12.772 @ 108.57
1992 Mitsubishi Galant VR-4
678/1000
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