I tried the search feature and as you could imagime the words "boost" and "pump" gave me all sorts of stuff not relavent. I was told about this boost a pump from Kenne Belle. Looks to be about 150 dollars cheaper than AVO's option for the Legacy GT. Does anyone have any feedback on this unit?
Thanks!!

I use to own a V8 Dodge Dakota which I had a Kenne Belle supercharger on it. I had their Boost a Pump and their Boost a Spark. Both worked great for my application.

what are you trying to accomplish?

IIRC... The Boost-s-pumpwas designed to work on cars that utilized a returnless fuel system and no vacuum controlled fuel pressure regulator. This type of fuel system uses a "smart pump" that does nto work in an on and off type function as many, but actually works to keep flow of fuel continuous.

The Boost-a-pump I believe messes with the voltage signal to the pump, and you can therefore increase fuel pressure and flow with the turn of a knob.

I may be wrong... I'm really going by memory.

I know of a focus that used one on a turbo set-up... but I don't know anything else about it.

One of the low-tech approaches may be an old turbo DSM trick.

On the 1G and 2G DSM's, the wiring going back to the fuel pump was only 16-gauge. The pump was being limited by the wiring....it couldn't draw enough power to run to it's full potential. People found that by wiring in some 10-gauge wire to deliver more power and lower voltage drop to the fuel pump, it put out significantly more flow.

As I recall, the typical arrangement was to use the stock 16-gauge wire to control a relay. The 10-gauge wire ran directly from the battery to the relay, and then on to the fuel pump.

That was a lot cheaper than a new fuel pump. Not sure if that would work with the stock fuel pump on the Legacy, but may be worth looking to see if it would be possible.

-Michael

Sponaugle is using a KB boost-a-pump on his car.

S.

The Boost-a-Pump is simply a voltage amplifier. It allows you to up the voltage seen by the fuel pump to increase the volume of fuel that it can flow. It is designed to work with a traditional return style fuel system. It does work in the Legacy, I believe there is at least one guy on the legacy board that runs one in his car. It is an effective and cost efficient solution.

Sponaugle is using a KB boost-a-pump on his car.

S.
When we switched to twin pumps we also did a boost a voltage system.

I don't think the factory setup liked two fuel pumps :(

Ok, I've started a thread over at legacygt.com about the Boost-A-Pump.

http://www.legacygt.com/forums/showthread.php?t=32571

I have one question right now, what happens with fuel flow from the pump if I have the Boost-A-Pump active at full blast and bump up the pressure at the fuel rails (maybe 10psi)? I am trying to see if I can get 350whp on stock 560cc/min injectors with the Boost-A-Pump and adjustable FPR.

i've been abusing a walbro gss342 with +20psi over the stock 3 bar static pressure (63psi @ idle w/no manifold reference).

and i run 22psi boost pressure on top of that. :D

end result is about 280whp @ 11.5:1 w/93 octane and oem wrx blue injectors.

i think a beefier fuel pump should be your method of increasing fuel flow at pressure, not by bumping up the voltage across the terminals. why use a 250 dollar part that requires rewiring when you can use a 100 dollar part that drops in?

A Walbro does not drop in a LGT, AVO is currently the only place for a drop-in replacement and is ~$300.


But, it's nice to know you can run upwards of 80psi on the injectors without them failing.