Fuel Rail Pressure's relationship to fuel economy.

[LBZoom]

Okay I got it now. Thanks for the help guys!

[killerbee]

The CP3 is a parasitic accessory.

[DmaxHawk]

The CP3 is a parasitic accessory.

What would be better?

[killerbee]

Nothing. Just pointing out that higher fuel pressure equals more parasite. When commanding more pressure without a commensurate power increase requirement, the impact (IMO) is more drag.

As Bballer said, there may be some burn effect differences that are not as easy to predict.

[duramaximizer]

I figured the CP3 is always making 30k internally, but the fuel pressure regulates output of that pressure to the rail. What side of the pumps is the FRP on low side or high side. My guess is low side, but I always thought it was on high side.

[killerbee]

regardless of output, it doesn't work for free.

[bballer182]

Nothing. Just pointing out that higher fuel pressure equals more parasite. When commanding more pressure without a commensurate power increase requirement, the impact (IMO) is more drag.

As Bballer said, there may be some burn effect differences that are not as easy to predict.

Good point, i forgot to mention that.

[DmaxHawk]

Okay I got it now. Thanks for the help guys!

How much did you lower it by?

[duramaximizer]

regardless of output, it doesn't work for free.

I just figured its hp scavenged was a given amount at a given RPM range not a variable hp amount at a variable pressure level. Can anyone confirm this on bench tester based on resistance?