"anti Fuel Surge" Explained

[KPM Motorsport]

Anti-surge explained

With the release of our innovative Streetfighter intank fuel system, there have been many
questions asked of us and much talk of what is an “anti-surge” fuel system

Simply, the answer is-

A fuel system that will supply a constant flow of cool fuel at a constant pressure
without aeration to meet the engines demands under all conditions

This supply of fuel must be met under all conditions from idle to maximum power, low
fuel level to full tank levels, straight-line driving, to extreme cornering,
slow take off to extreme launches, cold conditions to hot road track
temperatures.

You will notice that almost all standard vehicles are engineered to meet all these demands.

They have to be or most of us would be back at the dealership complaining to have the “surge”
fixed under warranty.

Therefore the standard fuel systems designed by the vehicle manufacturer engineers can be called “anti-surge fuel systems.”

The problem of fuel surge arises when we enthusiasts start modifying our standard vehicles for
increased engine power.

Standard fuel systems are only designed to supply fuel correctly “without surge” at the
standard engine power levels.

Increased engine power can only be supported by increased fuel delivery.

Once we increase the level of engine power beyond the standard fuel system capabilities we WILL
start to experience the effects of “fuel surge”.

Depending on how much extra engine power you have, “fuel surge” can be as subtle as a slight lean out
that you do not feel on heavy acceleration or as extreme as absolute starvation
causing a pause in power and to bang you head against the windscreen.

The answer to overcome this fuel surge on your extra engine power is-

"A fuel system that will supply a constant flow of cool fuel at a constant pressure without aeration to
meet the engines demands under all conditions.”

Depending on your level of power increase this can be done by several methods

1) Direct replacement of the standard fuel pump with a higher fuel supply pump.

Will the extra fuel pump supply now drain your standard swirl pot /module of fuel to quickly?

If so, you will need:

2) Replacement larger intank fuel module with single or more fuel pumps

or

3) External fuel pump/s and tank addition.

Will the extra delivery of fuel cause high fuel pressures, therefore minimizing your fuel pump maximum
delivery capabilities?

Will the larger/extra fuel pumps need correct rewiring to supply the correct amperage demands for maximum
fuel delivery?

If so, you will need

-Fuel modules
fittings etc. engineered for correct fuel pressures

-Fuel pressure
regulators to support the extra flow

-Rewiring of your
fuel system.

Of course all systems will vary in one need or another for them to work correctly and
overcome previously mentioned fuel surge causes.

They will also need to capture and hold fuel in calculated quantities to prevent surge from cornering,
take off, braking etc.

With both our Streetfighter 1000HP intank pump module and Walbro 460 packages KPM have engineered,
developed and tested our latest inovative fuel systems to meet all these requirements to

" supply a constant flow of cool fuel at a constant pressure without aeration to meet the engines demands under all
conditions "

Our fuel systems have been thouroughly bench , track and road tested on all aspects mentioned.
We ensure and guarantee to supply a true high performance , safe, whisper quiet and legal “anti surge system" that operates perfectly on your standard or 1000hp vehicle.

Edited 02/02/13 02:08 AM by KPM Motorsport

[sexual harrassment panda]

Glad to see you guys have changed it to without aeration, the last thread had me all kinds of wtf

[hoarspower]

Are there suited to us poor ba owners ?

[KPM Motorsport]

Glad to see you guys have changed it to without aeration, the last thread had me all kinds of wtf

Slight wording mistake.

[Kosij]

I noticed after driving my ba for 15mins and draining the E85 from the surge tank the fuel was very very warm! Is fuel temp an issue?

[KPM Motorsport]

Yes fuel temperature is a very important issue.

The hotter the fuel becomes the less dense it is.

Cold fuels will cause hard startarting problems.

Hot or overheated fuel or overly volatile fuel is the main cause of vapor lock and leaning out of mixtures.

Fuel temperature depends on several factors:

the ambient temperature

how hard the vehicle is working,

how well the fuel system is isolated from the heat of the engine

how effectively the fuel system is cooled

This is one of the major reasons manufacturers place the fuel systems intank.

The fuel tank is located away from many potential heat sources eg engine, exhausts, proximity to road temperature

All fuel is returned to a large resevoir ( fuel tank ) and is cooled by the surrounding fuel.

the pump/s are also immersed and kept cool.

Our Streetfighter 1000hp intank and Walbro 460 intank fuel systems follow suit.

Edited 02/02/13 11:53 PM by KPM Motorsport