However there is a fourth category that you will find 90% of people with aftermarket fuel pressure regulators fall into:Ĥ.
#Do you need a pressure regulater for ppe fuel pump upgrade#
A few do fall into the first category because they may be on a budget and don't want to upgrade the stock injectors so they choose to bump the rail pressure up instead and obviously a few will fall into the third category. So as you can see, not many people fall into the second category because a lot of people don't run 2+bar of boost through their car. The factory fuel pressure regulator has failed so you may choose to buy an aftermarket one however still run it at factory fuel pressure. Therefore you will need an aftermarket fuel pressure regulator that can handle this high amount of boost pressure and keep up the 1:1 ratio.ģ. When you are running huge amounts of boost and the factory fuel pressure regulator can not keep up the 1:1 fuel pressure ratio. Just buy the correct injectors to start with.Ģ. Obviously this isn't ideal and most people don't recommend it. When your injectors are starting to max out, but you don't want to upgrade them, so you bump up the rail pressure with the aftermarket adjustable fuel pressure regulator to push them a little but furthur. The only reason to "upgrade" the factory FPR is really in three instances:ġ.
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