Power steering overrun - lack of flow or worn box?

Just for anyone who runs across this. The pump I'm using is the problem, not enough flow. I hooked a flow meter up to it and it runs 1 GPM in it's limp mode, so, it's just fine for around town driving, but no good for racing / autocrossing. It looks like you need at least 2 to 2.5 GPM for the borgeson box, and I suspect more for the OEM box.