Well, it'll create flow resistance. So in theory it would increase the pressure drop across the fitting for the same flow rate, or for the same pressure drop, it'll decrease the flow rate. I guess it makes sense that it'll decrease flow rate so you won't see the fluctuation in the signal, but if you kink it off too much, the lag in the reading won't represent real-time. Hopefully they've properly sized a sharp-edge orifice resistance like what they're using so you'll see full boost when you hit it, and not a full second later.
Is there a gain setting on the boost controller on the UniChip? If so, you might try cutting that down a bit.