THE OFFICIAL HPFP CDFP FUEL PUMP THREAD

[themytb]

****2015 update, thanks @SarcasticOne;!
The following applies to all 2.3 MZR DISI powered mazdas as they all share the same pump. (ms3 both gens- ms6- cx-7)

GENERAL

Direct injected engines require a far higher fuel pressure then a port injected engine. This is why we have two fuel pumps. We have an in-tank pump and a high pressure cam driven pump.

The high pressure pump is commonly referred to on this site as the HPFP(high pressure fuel pump) and occasionaly as a CDFP(cam driven fuel pump)

The in-tank pump sends fuel at a low pressure to the HPFP which vastly increases the pressure and sends the fuel to the injectors.

For a very basic overview, here's a MSPaint picture:

From the fuel tank, fuel gets pumped via an "in tank fuel pump" (ITFP) at ~50-60psi through the red "line"... that's enough pressure for your port injectors, and it's really all about how much fuel it can flow, rather than the pressure.
The HPFP then takes this fuel, and pressurizes it up to 1600+ psi...

As you modify your car and make more power the engine requires more fuel to feed the ignition process. At some point the stock HPFP will lack the ability to keep up with fuel demands. When this happens your engine enters a dangerous scary world of possible boom.
Thankfully we have some upgrade options making real power a possibility for us.

So how do you know when you need to upgrade?

The ONLY real way to know positively is through a logging/ ecu data device which can read/log your fuel pressure, such as an access port or dashhawk. Any thing under 1600 psi at WOT is a case of needing an upgrade. However, many would say to upgrade before it is NEEDED. Who wants to drive around like a grandma while waiting for parts and install anyways?

What does this look like in your logs? Well, something like this:



See how it's dropping below 1600psi? this is a sure sign that the HPFP is not capable of keeping up with the fueling demands.

The modification level that requires a HPFP uprade varies from model to model, gen to gen, and even car to car. (READ THE PARAGRAPH ABOVE AGAIN)

GEN 1 MS3 & MS6
Most low level flow mods are ok( intake,test pipe, CBE etc)
Add an upgraded intercooler or a tune and your pushing it.
Add a downpipe and you might as well get the internals installed FIRST.
Don't even think about upgrading your turbo without an upgrade.

GEN 2 MS3
The genpu does not play as nice with the HPFP.
Many need an upgrade with just an intake, and Cobb states that some HPFP's will not keep up with stage 1 maps.
Upgrade should be very early on your list.

CX-7****
Much like MS3's, refer to 1st and 2nd Gen MS3 above

I cannot say this enough the ONLY way to know for sure is through logging.

OPTIONS

So you've decided to upgrade, now what? Well, you can either buy yourself an upgraded pump, or save some money and buy upgraded pump internals to install into the pump yourself. The full pump is about as easy as it can get to install, but many members here have installed internals themselves with no issues(this is the route most take).

All these items are available from many different vendors both on MSF and not, and at varying prices. I am only linking to the manufacturers site and giving their prices.
You will notice some are listed as VW/AUDI parts, this is because we share a common HPFP with some of their engines- do not worry about that

I will list the internals kits first.
Autotech
part number 10-127-100k $399.95
VW Performance - Autotech Sport Tuning: Hi-Volume Fuel Pump UpGrade Kit 2.0T FSI


KMD
part number 03020 $329.95
Audi - A3 - 2.0T FSI - Engine - KMD Tuning - 2.0T FSI High Pressure Fuel Pump Kit - KMD Tuning & Engineering


HPFPupgrade(ptp)
part number HPFP00005 $349.00
Mazda DISI Do It Yourself Pump Internals | HPFPUpgrade.com



CorkSport Max Flow Fuel Pump
part number Gen-6-999-10 $349.99
CorkSport Max Flow HPFP Fuel Pump Internals


Now for the full pumps
Most pumps will require you to pay a core charge added to the price of the pump, when you install your new pump you send your old pump back to them and get your core charge refunded back to you.

CP-E
part number MZR23HPFP $667.56+$350 core
MZR DISI 2.3 HPFpump


HPFP upgrade(ptp)
2 options

1-upgrade your pump(send it to them, they upgrade it and send it back)
part number HPFP00004
A-stage 1 $549.00 B-stage 2 $799.00
Mazda DISI Upgrade Your Pump | HPFPUpgrade.com


2-complete HPFP(prebuilt and core charge-no wait)
part number HPFP00003
A-stage 1 $549.00+$350.00 core B-stage 2 $799.00+$350.00 core
Mazda DISI Complete High Pressure Fuel Pump | HPFPUpgrade.com



Need some help with install?
Luckily you've found the best damn Mazdaspeed tech site in the world and we can help you with that.

Fuel Pump internals Install!

CDFP internals upgrade

How-to: Install your Autotech fuel pump internals