I got a set from paul at impulse and love them. I was running higher fuel pressure at idle with a 2 to 1 reg to try and ram the fuel through the stock ones at higher boost, so I seen a increase in bottom end response. The stockers were letting to much fuel through at low rpm's because of the pressure increase. I would tend to think it is running out of fuel at about 14 lbs, thats what my air fuel was saying with the stock set up. I have a pl control box and with the injectors my response is still excelent.