[dec010974]

thanks br3w City. That means the Walbro 255 fuel pump, should flow enough fuel for any ls1 swap, up to a 58 PSI, WOT. In a 12 volt system, what would alter the Walbro's Performance, to a measly 48 PSI and lower? I guess I will never know. Oh yeah ls1nova71, when I removed the vacuum line, from the Fuel Pressure Regulator, it rose between to 53 and 54 PSI.