hydro tec phase 2 Gas Milage

I am considering installing a phase 2 kit in a HPDI 225 Just wondering how it will affect fuel millage at crusing speed. I have a fuel flow meter and at 45 to 50 Im burning about 10-11 GPH and WOT 21 or so GPH. I have a ZX225 skeeter and loaded am running about 69 full fuel and loaded. http://www.bassboatcentral.com/smileys/ohwell.gif

On my 300 HPDI, I didn't notice a mileage change when going from just heads to full stage 3. You should gain a little with the heads, though.

Mike