Fuel pressure regulator for 3100/3400

[BerettaZ26]

Is there a performance fuel pressure regulator made for the 3100/3400 V6? I've heard that I can squeeze a few more horses out of my motor by raising the pressure a little bit. Somebody let me know.
Thanx

[caffeine]

Fuel pressure regulator for 3100/3400

IMO the only thing a few extra psi of fuel pressure would accomplish is bad fuel economy. Unless there's something wrong with the stock one.

[BerettaZ26]

nothing wrong with the stock one just thought I could get some more HP out of the motor by increasing the pressure.
Thanx for the info Caffeine.

[ericjon262]

IMO the only thing a few extra psi of fuel pressure would accomplish is bad fuel economy. Unless there's something wrong with the stock one.

there's no reason it would lower fuel economy if compensated for in the tune, and if the engine needs more fuel, this is a way to get there without replacing injectors.

now that being said, it's not necessary for a CAI and a muffler.

[caffeine]

He made no mention of tuning. It's not uncommon for people to say that increasing fuel pressure increases fueling therefore increasing power. The reality is that increasing fuel without increasing air often results in less power. GM tunes are often too rich to begin with anyway I find.

[Superdave]

He made no mention of tuning. It's not uncommon for people to say that increasing fuel pressure increases fueling therefore increasing power. The reality is that increasing fuel without increasing air often results in less power. GM tunes are often too rich to begin with anyway I find.

Agreed


Put a wideband on it and see what the AFR's are at WOT if you are worried about it being lean. I bet it's not, probably still rich.

[ericjon262]

He made no mention of tuning. It's not uncommon for people to say that increasing fuel pressure increases fueling therefore increasing power. The reality is that increasing fuel without increasing air often results in less power. GM tunes are often too rich to begin with anyway I find.

I was just playing devil's advocate

[trotterlg]

All that will happen if you increase the fuel pressure is that the computer will shorten up the injector pulse to compensate for it and the car will run exactly like it did before. Larry

[caffeine]

You're forgetting that the ECM only adjusts WOT fueling if it detects that the engine is running lean, and also that in open loop it won't adjust fueling either.

The only thing that won't be affected is part/no throttle after the engine is warmed up

Since increased fuel pressure will only lead to a richer fuel mixture, that means that under WOT fueling WILL be increased regardless of how much the computer has learned.

[robertisaar]

yeah, i don't see the effort/money being spent on an adjustable regulator being of much use.

if you want the (slightly) better atomization due to higher pressure, the 00+ unit could be used, but as mentioned, there are problems associated with it if the calibration isn't changed to match reality.

[BerettaZ26]

there's no reason it would lower fuel economy if compensated for in the tune, and if the engine needs more fuel, this is a way to get there without replacing injectors.

now that being said, it's not necessary for a CAI and a muffler.

I only put the CAI on there for more air flow and it helped my motor a lot and the muffler just makes it sound good and freed up a few horses.