Fuel pressure is set by the pressure regulator on the fuel rail, not the pump. All you need is a pump that is capable of delivering more pressure than the regulator is set for. The highest pressure is commanded when intake manifold vacuum is lowest which is during heavy acceleration. Thanks to the vacuum hose on the regulator, it will drop fuel pressure when manifold vacuum is high such as during coasting.
Be aware insurance investigators just love to find these kinds of modifications from what came from the factory. Is there a reason you don't want to put the proper pump back in the tank?
Thursday, December 23rd, 2010 AT 10:18 PM