Are Fuel Pressure Regulators Bad?

[Turbz RB-25]

Hi Fellas,

Just a quick question, I understand the basic principle of what a fuel pressure regulator does. I have 555cc injectors and I am aiming for around 360 rwkw.

Now, if I increase fuel pressure to make them flow more, what is the down side to this?

Can the injectors break? Fuel Pump clonk out? hoses split?

Cheers

[Beer Baron]

well fuel pumps can start to struggle the higher the pressure. and then their flow drops off. i have never seen a need to increase fuel pressure. if you need more fuel flow get a better flowing pump and some bigger injectors. I could only see it being worthwhile if you find you need just a little more fuel and are not planning to ever need more power. then by all means gain that little bit extra by upping pressure a little.

and yes the higher the pressure the higher the risk of leaking injectors, leaking hoses etc.

[Turbz RB-25]

well fuel pumps can start to struggle the higher the pressure. and then their flow drops off. i have never seen a need to increase fuel pressure. if you need more fuel flow get a better flowing pump and some bigger injectors. I could only see it being worthwhile if you find you need just a little more fuel and are not planning to ever need more power. then by all means gain that little bit extra by upping pressure a little.

and yes the higher the pressure the higher the risk of leaking injectors, leaking hoses etc.

How much more power would you say they would add? For example, if my 555cc injectors max out at 330 rwkw without a FPR, what would I expect with a FPR installed?

[STATUS]

Forget the reg. Do it properly.

[Duncan]

if you need a cheap solution you can probably squeeze 10% more out of an FPR.

[Cjmartz2k]

What pump is behind the FPR? I think that would matter a good bit. I wouldn't try to much with a Walbro, but a bosch or aeromotive or something like that I might.