fuel regulators

[vishus]

who makes a good adjustable fuel regulator? I want one that can be set to 39psi for my currently stock 2.5EFI, but as I modify/turn up the rpm, I want to be able to go to 56psi. I was looking at JEGS and saw a slew of different models, some billet, some plain, a little confusing at which would be a good choice for the 2.5EFI.

As I understand, 39psi is good for 8000rpm, and I want to be able to spin to 9000 for brief (1/4mi runs). I am going to be running a Bosch 984 pump.

thx.sid

[Jay Smith]

Tony Brucato sells the Bosch units and they make an adjustable regulator that works real well on outboard applications. The Jegs stuff are automotive and others may disagree but I like to stick with apples to apples !

Just my opinion and experiences!

[STV_Keith]

The Bosch number on the 39# regulator is 0 280 160 200. What is the part number on the 56# regulator?

[vishus]

I can't find a part# for the Bosch Regulator. I have a "gold" 39psi regulator, I just wanted to be able to TURN it up when running hard!!!

thx.sid

[T-REX]

Barry Grant bypass regulator iz a good one...It don't make a diddly what it's on, a car or a boat...fuel flow iz fuel flow...I have a 0-30# and a 20-100#, and they work great!!...Top ov tha line az far as I'm concerned...My 2centz, REX:cool:

[TB21]

I have great luck with the aeromotive # 027-13109 from jegs , like Trex said fuel flow is fuel flow..........but some of the automotive reg. wont flow enough volume for a 9000 rpm mercury , the mallory efi regulator is an example it simply wont flow enough in stock form , i found that out the hard way.
TB

[stoker2001]

imho i wouldnt ever turn up pressure over 56#.if you need more fuel you should modify ecu or adjust pot up.pressures above 56 increase amp draw,which can overwork pump and tax that whopping 16 amp stator:D

[STVBOY]

Why does the a48 chip have a limiter that is 11,500rpm and it only requires 39psi. I am assuming Mercury would not have designed it so it would blow up as soon as you exceed the 8,000 mark.

[Tony Brucato]

The injectors have a longer open duration at a lower fuel pressure, and available time to meter fuel decreases with increased RPM.
You will get to a point where there's not enough time available to comepletely close the injector before they must open again. This will cause the injectors to hang open and flood.
This RPM threshold won't be the same on all of your injectors. Usually one or two injectors will flood like this first, creating enough power loss to keep RPM down.

[vishus]

Tony,

1. NOW - I have a analog ecu and was wanting to increase performance and ensure that it has enough fuel if I spin it to 9000rpm. IF I stay with the A27 that comes stock, will the "gold" 39psi regulator and one of the Bosch Drag pumps provide enough fuel?


I would like to go to one of your PCUs, but I will need to wait till summer and the funds allow.

2. SOMEDAY - With your PCU and the Drag Pump, would I be better going to the "black" 56psi regulator?


thx.sid

p.s. I will be ordering one of your Drag Pumps on Friday (PAYDAY), how long and how much to ship to AZ (85224)?

[steve]

The A27 and a 39psi system and a good pump will spin 9,000.